task_name
string | rows
int64 | cols
int64 | rules
string | visual_elements
string | initial_board
string | solution
string | initial_observation
string | solution_reference
string | description
string | title
string | hint
string |
|---|---|---|---|---|---|---|---|---|---|---|---|
sudoku_normal_hard_50
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
793.1.65..4653..9...8..9..358.9..1..9...5...8..1....456154..389.79..3.2..32.9...7
|
793218654146537892258649713587924136964351278321786945615472389479863521832195467
|
7 9 3 . 1 . 6 5 .
. 4 6 5 3 . . 9 .
. . 8 . . 9 . . 3
5 8 . 9 . . 1 . .
9 . . . 5 . . . 8
. . 1 . . . . 4 5
6 1 5 4 . . 3 8 9
. 7 9 . . 3 . 2 .
. 3 2 . 9 . . . 7
|
7 9 3 2 1 8 6 5 4
1 4 6 5 3 7 8 9 2
2 5 8 6 4 9 7 1 3
5 8 7 9 2 4 1 3 6
9 6 4 3 5 1 2 7 8
3 2 1 7 8 6 9 4 5
6 1 5 4 7 2 3 8 9
4 7 9 8 6 3 5 2 1
8 3 2 1 9 5 4 6 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2303h1
|
793218654146537892258649713587924136964351278321786945615472389479863521832195467 #1 Medium (446)
Locked Candidates Type 1 (Pointing): 4 in b4 => r8c3<>4
Locked Pair: 5,9 in r78c3 => r1c3,r79c2<>5, r1c3,r7c2<>9
Naked Single: r1c3=3
Naked Single: r7c2=1
Naked Single: r2c3=6
Naked Single: r7c9=9
Naked Single: r9c2=3
Naked Single: r7c3=5
Naked Single: r7c8=8
Naked Single: r8c3=9
Naked Single: r1c8=5
Hidden Single: r1c2=9
Hidden Single: r2c5=3
Hidden Single: r4c4=9
Hidden Single: r6c7=9
Hidden Single: r6c1=3
Hidden Single: r9c6=5
Naked Single: r9c7=4
Naked Single: r8c7=5
Naked Single: r9c1=8
Full House: r8c1=4
Hidden Single: r2c7=8
Hidden Single: r3c2=5
Hidden Single: r4c8=3
Hidden Single: r5c4=3
Hidden Single: r5c6=1
Hidden Single: r3c5=4
Hidden Single: r1c9=4
Hidden Single: r2c6=7
Naked Single: r7c6=2
Full House: r7c5=7
Naked Single: r1c6=8
Full House: r1c4=2
Full House: r3c4=6
Naked Single: r6c6=6
Full House: r4c6=4
Naked Single: r9c4=1
Full House: r9c8=6
Full House: r8c9=1
Naked Single: r4c5=2
Naked Single: r6c2=2
Full House: r5c2=6
Naked Single: r4c3=7
Full House: r4c9=6
Full House: r2c9=2
Full House: r5c3=4
Full House: r2c1=1
Full House: r3c1=2
Naked Single: r8c4=8
Full House: r6c4=7
Full House: r6c5=8
Full House: r8c5=6
Naked Single: r5c8=7
Full House: r3c8=1
Full House: r3c7=7
Full House: r5c7=2
|
sudoku_normal_extremely_hard_50
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
7...1.6...4.5...9...8..9..358....1..9...5...8..1....456..4..3...7...3.2...2.9...7
|
793218654146537892258649713587924136964351278321786945615472389479863521832195467
|
7 . . . 1 . 6 . .
. 4 . 5 . . . 9 .
. . 8 . . 9 . . 3
5 8 . . . . 1 . .
9 . . . 5 . . . 8
. . 1 . . . . 4 5
6 . . 4 . . 3 . .
. 7 . . . 3 . 2 .
. . 2 . 9 . . . 7
|
7 9 3 2 1 8 6 5 4
1 4 6 5 3 7 8 9 2
2 5 8 6 4 9 7 1 3
5 8 7 9 2 4 1 3 6
9 6 4 3 5 1 2 7 8
3 2 1 7 8 6 9 4 5
6 1 5 4 7 2 3 8 9
4 7 9 8 6 3 5 2 1
8 3 2 1 9 5 4 6 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2303h1
|
793218654146537892258649713587924136964351278321786945615472389479863521832195467 #1 Medium (446)
Locked Candidates Type 1 (Pointing): 4 in b4 => r8c3<>4
Locked Pair: 5,9 in r78c3 => r1c3,r79c2<>5, r1c3,r7c2<>9
Naked Single: r1c3=3
Naked Single: r7c2=1
Naked Single: r2c3=6
Naked Single: r7c9=9
Naked Single: r9c2=3
Naked Single: r7c3=5
Naked Single: r7c8=8
Naked Single: r8c3=9
Naked Single: r1c8=5
Hidden Single: r1c2=9
Hidden Single: r2c5=3
Hidden Single: r4c4=9
Hidden Single: r6c7=9
Hidden Single: r6c1=3
Hidden Single: r9c6=5
Naked Single: r9c7=4
Naked Single: r8c7=5
Naked Single: r9c1=8
Full House: r8c1=4
Hidden Single: r2c7=8
Hidden Single: r3c2=5
Hidden Single: r4c8=3
Hidden Single: r5c4=3
Hidden Single: r5c6=1
Hidden Single: r3c5=4
Hidden Single: r1c9=4
Hidden Single: r2c6=7
Naked Single: r7c6=2
Full House: r7c5=7
Naked Single: r1c6=8
Full House: r1c4=2
Full House: r3c4=6
Naked Single: r6c6=6
Full House: r4c6=4
Naked Single: r9c4=1
Full House: r9c8=6
Full House: r8c9=1
Naked Single: r4c5=2
Naked Single: r6c2=2
Full House: r5c2=6
Naked Single: r4c3=7
Full House: r4c9=6
Full House: r2c9=2
Full House: r5c3=4
Full House: r2c1=1
Full House: r3c1=2
Naked Single: r8c4=8
Full House: r6c4=7
Full House: r6c5=8
Full House: r8c5=6
Naked Single: r5c8=7
Full House: r3c8=1
Full House: r3c7=7
Full House: r5c7=2
|
sudoku_normal_hard_51
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
1..2..7.384..7.6.19.....5.259.8...3...1.2.9...8...4..63.9..28.7.2.65.3196.87.3...
|
165289743842375691973461582596817234431526978287934156359142867724658319618793425
|
1 . . 2 . . 7 . 3
8 4 . . 7 . 6 . 1
9 . . . . . 5 . 2
5 9 . 8 . . . 3 .
. . 1 . 2 . 9 . .
. 8 . . . 4 . . 6
3 . 9 . . 2 8 . 7
. 2 . 6 5 . 3 1 9
6 . 8 7 . 3 . . .
|
1 6 5 2 8 9 7 4 3
8 4 2 3 7 5 6 9 1
9 7 3 4 6 1 5 8 2
5 9 6 8 1 7 2 3 4
4 3 1 5 2 6 9 7 8
2 8 7 9 3 4 1 5 6
3 5 9 1 4 2 8 6 7
7 2 4 6 5 8 3 1 9
6 1 8 7 9 3 4 2 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1909h
|
165289743842375691973461582596817234431526978287934156359142867724658319618793425 #1 Medium (414)
Hidden Single: r4c2=9
Hidden Single: r8c7=3
Locked Triple: 2,4,7 in r8c123 => r8c49<>4, r8c46,r9c2<>7, r79c2,r8c6<>2
Hidden Single: r7c6=2
Hidden Single: r9c4=7
Hidden Single: r8c2=2
Locked Candidates Type 1 (Pointing): 1 in b3 => r2c146<>1
Hidden Single: r1c1=1
Hidden Single: r2c1=8
Hidden Single: r7c7=8
Naked Single: r8c9=9
Naked Single: r2c9=1
Naked Single: r8c4=6
Naked Single: r2c7=6
Naked Single: r4c9=4
Naked Single: r8c6=8
Naked Single: r2c8=9
Naked Single: r9c9=5
Full House: r5c9=8
Naked Single: r2c6=5
Naked Single: r9c2=1
Naked Single: r2c4=3
Full House: r2c3=2
Naked Single: r7c2=5
Naked Single: r5c4=5
Naked Single: r1c2=6
Naked Single: r5c8=7
Naked Single: r1c3=5
Naked Single: r1c6=9
Naked Single: r5c1=4
Naked Single: r5c2=3
Full House: r5c6=6
Full House: r3c2=7
Full House: r3c3=3
Naked Single: r8c1=7
Full House: r6c1=2
Full House: r8c3=4
Naked Single: r6c3=7
Full House: r4c3=6
Naked Single: r3c6=1
Full House: r4c6=7
Naked Single: r4c5=1
Full House: r4c7=2
Naked Single: r6c7=1
Full House: r6c8=5
Full House: r9c7=4
Naked Single: r3c4=4
Naked Single: r6c4=9
Full House: r7c4=1
Full House: r6c5=3
Naked Single: r7c5=4
Full House: r7c8=6
Full House: r9c5=9
Full House: r9c8=2
Naked Single: r1c5=8
Full House: r1c8=4
Full House: r3c8=8
Full House: r3c5=6
|
sudoku_normal_extremely_hard_51
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...2..7.3.4..7....9.....5.25..8...3...1.2.9...8...4..63.9.....7....5..1.6.8..3...
|
165289743842375691973461582596817234431526978287934156359142867724658319618793425
|
. . . 2 . . 7 . 3
. 4 . . 7 . . . .
9 . . . . . 5 . 2
5 . . 8 . . . 3 .
. . 1 . 2 . 9 . .
. 8 . . . 4 . . 6
3 . 9 . . . . . 7
. . . . 5 . . 1 .
6 . 8 . . 3 . . .
|
1 6 5 2 8 9 7 4 3
8 4 2 3 7 5 6 9 1
9 7 3 4 6 1 5 8 2
5 9 6 8 1 7 2 3 4
4 3 1 5 2 6 9 7 8
2 8 7 9 3 4 1 5 6
3 5 9 1 4 2 8 6 7
7 2 4 6 5 8 3 1 9
6 1 8 7 9 3 4 2 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1909h
|
165289743842375691973461582596817234431526978287934156359142867724658319618793425 #1 Medium (414)
Hidden Single: r4c2=9
Hidden Single: r8c7=3
Locked Triple: 2,4,7 in r8c123 => r8c49<>4, r8c46,r9c2<>7, r79c2,r8c6<>2
Hidden Single: r7c6=2
Hidden Single: r9c4=7
Hidden Single: r8c2=2
Locked Candidates Type 1 (Pointing): 1 in b3 => r2c146<>1
Hidden Single: r1c1=1
Hidden Single: r2c1=8
Hidden Single: r7c7=8
Naked Single: r8c9=9
Naked Single: r2c9=1
Naked Single: r8c4=6
Naked Single: r2c7=6
Naked Single: r4c9=4
Naked Single: r8c6=8
Naked Single: r2c8=9
Naked Single: r9c9=5
Full House: r5c9=8
Naked Single: r2c6=5
Naked Single: r9c2=1
Naked Single: r2c4=3
Full House: r2c3=2
Naked Single: r7c2=5
Naked Single: r5c4=5
Naked Single: r1c2=6
Naked Single: r5c8=7
Naked Single: r1c3=5
Naked Single: r1c6=9
Naked Single: r5c1=4
Naked Single: r5c2=3
Full House: r5c6=6
Full House: r3c2=7
Full House: r3c3=3
Naked Single: r8c1=7
Full House: r6c1=2
Full House: r8c3=4
Naked Single: r6c3=7
Full House: r4c3=6
Naked Single: r3c6=1
Full House: r4c6=7
Naked Single: r4c5=1
Full House: r4c7=2
Naked Single: r6c7=1
Full House: r6c8=5
Full House: r9c7=4
Naked Single: r3c4=4
Naked Single: r6c4=9
Full House: r7c4=1
Full House: r6c5=3
Naked Single: r7c5=4
Full House: r7c8=6
Full House: r9c5=9
Full House: r9c8=2
Naked Single: r1c5=8
Full House: r1c8=4
Full House: r3c8=8
Full House: r3c5=6
|
sudoku_normal_hard_52
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.41..8.2.5361..98..27.3..1..98....47..2.4.85.1.4....6..85.9.47...3..7.92..95...3.
|
941658723536172984827439615698215347372946851154783269285391476413867592769524138
|
. 4 1 . . 8 . 2 .
5 3 6 1 . . 9 8 .
. 2 7 . 3 . . 1 .
. 9 8 . . . . 4 7
. . 2 . 4 . 8 5 .
1 . 4 . . . . 6 .
. 8 5 . 9 . 4 7 .
. . 3 . . 7 . 9 2
. . 9 5 . . . 3 .
|
9 4 1 6 5 8 7 2 3
5 3 6 1 7 2 9 8 4
8 2 7 4 3 9 6 1 5
6 9 8 2 1 5 3 4 7
3 7 2 9 4 6 8 5 1
1 5 4 7 8 3 2 6 9
2 8 5 3 9 1 4 7 6
4 1 3 8 6 7 5 9 2
7 6 9 5 2 4 1 3 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2308m
|
941658723536172984827439615698215347372946851154783269285391476413867592769524138 #1 Easy (262)
Hidden Single: r1c3=1
Hidden Single: r9c3=9
Hidden Single: r8c8=9
Naked Single: r5c8=5
Naked Single: r7c8=7
Naked Single: r1c8=2
Naked Single: r4c8=4
Full House: r2c8=8
Naked Single: r2c3=6
Naked Single: r3c2=2
Naked Single: r7c3=5
Naked Single: r2c2=3
Naked Single: r4c3=8
Full House: r6c3=4
Naked Single: r1c1=9
Full House: r3c1=8
Naked Single: r2c9=4
Naked Single: r2c6=2
Full House: r2c5=7
Naked Single: r1c4=6
Naked Single: r1c5=5
Naked Single: r1c9=3
Full House: r1c7=7
Naked Single: r6c9=9
Naked Single: r5c9=1
Naked Single: r7c9=6
Naked Single: r3c9=5
Full House: r9c9=8
Full House: r3c7=6
Naked Single: r7c1=2
Naked Single: r9c7=1
Full House: r8c7=5
Naked Single: r7c4=3
Full House: r7c6=1
Naked Single: r4c4=2
Naked Single: r4c7=3
Full House: r6c7=2
Naked Single: r6c5=8
Naked Single: r4c1=6
Naked Single: r6c4=7
Naked Single: r8c5=6
Naked Single: r4c5=1
Full House: r4c6=5
Full House: r9c5=2
Naked Single: r5c2=7
Naked Single: r8c1=4
Naked Single: r5c4=9
Naked Single: r6c2=5
Full House: r6c6=3
Full House: r5c1=3
Full House: r9c1=7
Full House: r5c6=6
Naked Single: r8c2=1
Full House: r9c2=6
Full House: r9c6=4
Full House: r8c4=8
Full House: r3c4=4
Full House: r3c6=9
|
sudoku_normal_extremely_hard_52
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.4...8...5..1..9....7.3..1..9......7..2.4.8..1......6..8..9.4....3..7..2...5...3.
|
941658723536172984827439615698215347372946851154783269285391476413867592769524138
|
. 4 . . . 8 . . .
5 . . 1 . . 9 . .
. . 7 . 3 . . 1 .
. 9 . . . . . . 7
. . 2 . 4 . 8 . .
1 . . . . . . 6 .
. 8 . . 9 . 4 . .
. . 3 . . 7 . . 2
. . . 5 . . . 3 .
|
9 4 1 6 5 8 7 2 3
5 3 6 1 7 2 9 8 4
8 2 7 4 3 9 6 1 5
6 9 8 2 1 5 3 4 7
3 7 2 9 4 6 8 5 1
1 5 4 7 8 3 2 6 9
2 8 5 3 9 1 4 7 6
4 1 3 8 6 7 5 9 2
7 6 9 5 2 4 1 3 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2308m
|
941658723536172984827439615698215347372946851154783269285391476413867592769524138 #1 Easy (262)
Hidden Single: r1c3=1
Hidden Single: r9c3=9
Hidden Single: r8c8=9
Naked Single: r5c8=5
Naked Single: r7c8=7
Naked Single: r1c8=2
Naked Single: r4c8=4
Full House: r2c8=8
Naked Single: r2c3=6
Naked Single: r3c2=2
Naked Single: r7c3=5
Naked Single: r2c2=3
Naked Single: r4c3=8
Full House: r6c3=4
Naked Single: r1c1=9
Full House: r3c1=8
Naked Single: r2c9=4
Naked Single: r2c6=2
Full House: r2c5=7
Naked Single: r1c4=6
Naked Single: r1c5=5
Naked Single: r1c9=3
Full House: r1c7=7
Naked Single: r6c9=9
Naked Single: r5c9=1
Naked Single: r7c9=6
Naked Single: r3c9=5
Full House: r9c9=8
Full House: r3c7=6
Naked Single: r7c1=2
Naked Single: r9c7=1
Full House: r8c7=5
Naked Single: r7c4=3
Full House: r7c6=1
Naked Single: r4c4=2
Naked Single: r4c7=3
Full House: r6c7=2
Naked Single: r6c5=8
Naked Single: r4c1=6
Naked Single: r6c4=7
Naked Single: r8c5=6
Naked Single: r4c5=1
Full House: r4c6=5
Full House: r9c5=2
Naked Single: r5c2=7
Naked Single: r8c1=4
Naked Single: r5c4=9
Naked Single: r6c2=5
Full House: r6c6=3
Full House: r5c1=3
Full House: r9c1=7
Full House: r5c6=6
Naked Single: r8c2=1
Full House: r9c2=6
Full House: r9c6=4
Full House: r8c4=8
Full House: r3c4=4
Full House: r3c6=9
|
sudoku_normal_hard_53
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
5..19...6.6....9...97..4.2...3741.98.8.93..1.9.1..64...192..8....54.8.798....9..4
|
542193786368572941197684325623741598784935612951826437419257863235468179876319254
|
5 . . 1 9 . . . 6
. 6 . . . . 9 . .
. 9 7 . . 4 . 2 .
. . 3 7 4 1 . 9 8
. 8 . 9 3 . . 1 .
9 . 1 . . 6 4 . .
. 1 9 2 . . 8 . .
. . 5 4 . 8 . 7 9
8 . . . . 9 . . 4
|
5 4 2 1 9 3 7 8 6
3 6 8 5 7 2 9 4 1
1 9 7 6 8 4 3 2 5
6 2 3 7 4 1 5 9 8
7 8 4 9 3 5 6 1 2
9 5 1 8 2 6 4 3 7
4 1 9 2 5 7 8 6 3
2 3 5 4 6 8 1 7 9
8 7 6 3 1 9 2 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2106h1
|
542193786368572941197684325623741598784935612951826437419257863235468179876319254 #1 Medium (644)
Locked Candidates Type 2 (Claiming): 8 in r3 => r1c56,r2c456<>8
Hidden Single: r8c6=8
Hidden Single: r4c6=1
Hidden Single: r6c3=1
Naked Triple: 2,5,8 in r5c6,r6c45 => r4c5<>2, r4c5,r5c4<>5
Naked Triple: 1,3,5 in r3c179 => r3c24<>3, r3c45<>5
Naked Single: r3c2=9
Hidden Single: r1c5=9
Naked Single: r4c5=4
Naked Single: r5c4=9
Hidden Single: r7c3=9
Hidden Single: r8c9=9
Hidden Single: r4c8=9
Hidden Single: r8c4=4
Hidden Single: r7c1=4
Hidden Single: r1c2=4
Hidden Single: r5c3=4
Hidden Single: r5c1=7
Hidden Single: r9c2=7
Hidden Single: r2c8=4
Hidden Single: r9c3=6
Hidden Single: r1c7=7
Hidden Single: r6c9=7
Hidden Single: r5c7=6
Hidden Single: r4c1=6
Hidden Single: r8c2=3
Full House: r8c1=2
Naked Single: r8c7=1
Full House: r8c5=6
Naked Single: r3c5=8
Naked Single: r3c4=6
Hidden Single: r2c3=8
Full House: r1c3=2
Naked Single: r1c6=3
Full House: r1c8=8
Naked Single: r2c4=5
Naked Single: r6c4=8
Full House: r9c4=3
Naked Single: r9c8=5
Naked Single: r6c8=3
Full House: r7c8=6
Naked Single: r7c9=3
Full House: r9c7=2
Full House: r9c5=1
Naked Single: r2c9=1
Naked Single: r4c7=5
Full House: r3c7=3
Full House: r3c9=5
Full House: r4c2=2
Full House: r5c9=2
Full House: r3c1=1
Full House: r2c1=3
Full House: r6c2=5
Full House: r5c6=5
Full House: r6c5=2
Naked Single: r7c6=7
Full House: r2c6=2
Full House: r2c5=7
Full House: r7c5=5
|
sudoku_normal_extremely_hard_53
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
5..1....6.6....9....7..4.2...37....8.8..3..1.9....64...1.2..8....5....7.8....9..4
|
542193786368572941197684325623741598784935612951826437419257863235468179876319254
|
5 . . 1 . . . . 6
. 6 . . . . 9 . .
. . 7 . . 4 . 2 .
. . 3 7 . . . . 8
. 8 . . 3 . . 1 .
9 . . . . 6 4 . .
. 1 . 2 . . 8 . .
. . 5 . . . . 7 .
8 . . . . 9 . . 4
|
5 4 2 1 9 3 7 8 6
3 6 8 5 7 2 9 4 1
1 9 7 6 8 4 3 2 5
6 2 3 7 4 1 5 9 8
7 8 4 9 3 5 6 1 2
9 5 1 8 2 6 4 3 7
4 1 9 2 5 7 8 6 3
2 3 5 4 6 8 1 7 9
8 7 6 3 1 9 2 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2106h1
|
542193786368572941197684325623741598784935612951826437419257863235468179876319254 #1 Medium (644)
Locked Candidates Type 2 (Claiming): 8 in r3 => r1c56,r2c456<>8
Hidden Single: r8c6=8
Hidden Single: r4c6=1
Hidden Single: r6c3=1
Naked Triple: 2,5,8 in r5c6,r6c45 => r4c5<>2, r4c5,r5c4<>5
Naked Triple: 1,3,5 in r3c179 => r3c24<>3, r3c45<>5
Naked Single: r3c2=9
Hidden Single: r1c5=9
Naked Single: r4c5=4
Naked Single: r5c4=9
Hidden Single: r7c3=9
Hidden Single: r8c9=9
Hidden Single: r4c8=9
Hidden Single: r8c4=4
Hidden Single: r7c1=4
Hidden Single: r1c2=4
Hidden Single: r5c3=4
Hidden Single: r5c1=7
Hidden Single: r9c2=7
Hidden Single: r2c8=4
Hidden Single: r9c3=6
Hidden Single: r1c7=7
Hidden Single: r6c9=7
Hidden Single: r5c7=6
Hidden Single: r4c1=6
Hidden Single: r8c2=3
Full House: r8c1=2
Naked Single: r8c7=1
Full House: r8c5=6
Naked Single: r3c5=8
Naked Single: r3c4=6
Hidden Single: r2c3=8
Full House: r1c3=2
Naked Single: r1c6=3
Full House: r1c8=8
Naked Single: r2c4=5
Naked Single: r6c4=8
Full House: r9c4=3
Naked Single: r9c8=5
Naked Single: r6c8=3
Full House: r7c8=6
Naked Single: r7c9=3
Full House: r9c7=2
Full House: r9c5=1
Naked Single: r2c9=1
Naked Single: r4c7=5
Full House: r3c7=3
Full House: r3c9=5
Full House: r4c2=2
Full House: r5c9=2
Full House: r3c1=1
Full House: r2c1=3
Full House: r6c2=5
Full House: r5c6=5
Full House: r6c5=2
Naked Single: r7c6=7
Full House: r2c6=2
Full House: r2c5=7
Full House: r7c5=5
|
sudoku_normal_hard_54
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
275134698...78..4..8...6.713..8...27..7...9...9..71..41..5.7.8.75..12.....9.4.7..
|
275134698961785342483296571346859127817423956592671834134567289758912463629348715
|
2 7 5 1 3 4 6 9 8
. . . 7 8 . . 4 .
. 8 . . . 6 . 7 1
3 . . 8 . . . 2 7
. . 7 . . . 9 . .
. 9 . . 7 1 . . 4
1 . . 5 . 7 . 8 .
7 5 . . 1 2 . . .
. . 9 . 4 . 7 . .
|
2 7 5 1 3 4 6 9 8
9 6 1 7 8 5 3 4 2
4 8 3 2 9 6 5 7 1
3 4 6 8 5 9 1 2 7
8 1 7 4 2 3 9 5 6
5 9 2 6 7 1 8 3 4
1 3 4 5 6 7 2 8 9
7 5 8 9 1 2 4 6 3
6 2 9 3 4 8 7 1 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2205h1
|
275134698961785342483296571346859127817423956592671834134567289758912463629348715 #1 Medium (388)
Hidden Pair: 1,8 in r28c5 => r2c5<>2, r2c5<>5, r28c5<>9, r8c5<>6, r8c5<>7
Hidden Single: r8c1=7
Hidden Single: r3c8=7
Naked Single: r1c8=9
Hidden Single: r1c2=7
Hidden Single: r4c9=7
Hidden Single: r6c5=7
Hidden Single: r1c4=1
Naked Single: r2c5=8
Naked Single: r1c6=4
Naked Single: r8c5=1
Naked Single: r1c1=2
Full House: r1c9=8
Hidden Single: r7c6=7
Hidden Single: r9c8=1
Hidden Single: r9c6=8
Naked Single: r9c1=6
Naked Single: r2c1=9
Naked Single: r9c4=3
Naked Single: r2c6=5
Naked Single: r3c1=4
Naked Single: r9c2=2
Full House: r9c9=5
Naked Single: r4c6=9
Full House: r5c6=3
Naked Single: r3c3=3
Naked Single: r5c9=6
Naked Single: r7c3=4
Naked Single: r5c8=5
Naked Single: r7c2=3
Full House: r8c3=8
Naked Single: r4c7=1
Naked Single: r5c1=8
Full House: r6c1=5
Naked Single: r5c5=2
Naked Single: r6c8=3
Full House: r6c7=8
Full House: r8c8=6
Naked Single: r7c7=2
Naked Single: r4c3=6
Naked Single: r3c5=9
Full House: r3c4=2
Full House: r3c7=5
Naked Single: r5c4=4
Full House: r5c2=1
Naked Single: r6c4=6
Full House: r8c4=9
Full House: r4c5=5
Full House: r4c2=4
Full House: r6c3=2
Full House: r2c3=1
Full House: r7c5=6
Full House: r7c9=9
Full House: r2c2=6
Naked Single: r2c7=3
Full House: r2c9=2
Full House: r8c9=3
Full House: r8c7=4
|
sudoku_normal_extremely_hard_54
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..5.3.6.....7...4..8...6..13..8...2...7...9...9...1..41..5...8..5...2.....9.4.7..
|
275134698961785342483296571346859127817423956592671834134567289758912463629348715
|
. . 5 . 3 . 6 . .
. . . 7 . . . 4 .
. 8 . . . 6 . . 1
3 . . 8 . . . 2 .
. . 7 . . . 9 . .
. 9 . . . 1 . . 4
1 . . 5 . . . 8 .
. 5 . . . 2 . . .
. . 9 . 4 . 7 . .
|
2 7 5 1 3 4 6 9 8
9 6 1 7 8 5 3 4 2
4 8 3 2 9 6 5 7 1
3 4 6 8 5 9 1 2 7
8 1 7 4 2 3 9 5 6
5 9 2 6 7 1 8 3 4
1 3 4 5 6 7 2 8 9
7 5 8 9 1 2 4 6 3
6 2 9 3 4 8 7 1 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2205h1
|
275134698961785342483296571346859127817423956592671834134567289758912463629348715 #1 Medium (388)
Hidden Pair: 1,8 in r28c5 => r2c5<>2, r2c5<>5, r28c5<>9, r8c5<>6, r8c5<>7
Hidden Single: r8c1=7
Hidden Single: r3c8=7
Naked Single: r1c8=9
Hidden Single: r1c2=7
Hidden Single: r4c9=7
Hidden Single: r6c5=7
Hidden Single: r1c4=1
Naked Single: r2c5=8
Naked Single: r1c6=4
Naked Single: r8c5=1
Naked Single: r1c1=2
Full House: r1c9=8
Hidden Single: r7c6=7
Hidden Single: r9c8=1
Hidden Single: r9c6=8
Naked Single: r9c1=6
Naked Single: r2c1=9
Naked Single: r9c4=3
Naked Single: r2c6=5
Naked Single: r3c1=4
Naked Single: r9c2=2
Full House: r9c9=5
Naked Single: r4c6=9
Full House: r5c6=3
Naked Single: r3c3=3
Naked Single: r5c9=6
Naked Single: r7c3=4
Naked Single: r5c8=5
Naked Single: r7c2=3
Full House: r8c3=8
Naked Single: r4c7=1
Naked Single: r5c1=8
Full House: r6c1=5
Naked Single: r5c5=2
Naked Single: r6c8=3
Full House: r6c7=8
Full House: r8c8=6
Naked Single: r7c7=2
Naked Single: r4c3=6
Naked Single: r3c5=9
Full House: r3c4=2
Full House: r3c7=5
Naked Single: r5c4=4
Full House: r5c2=1
Naked Single: r6c4=6
Full House: r8c4=9
Full House: r4c5=5
Full House: r4c2=4
Full House: r6c3=2
Full House: r2c3=1
Full House: r7c5=6
Full House: r7c9=9
Full House: r2c2=6
Naked Single: r2c7=3
Full House: r2c9=2
Full House: r8c9=3
Full House: r8c7=4
|
sudoku_normal_hard_55
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
386421975...5..8.44.5....31158..2.47..9.4.1..6..8...9..1...47.6..2..7...8..25.41.
|
386421975721539864495678231158392647239746158674815392513984726942167583867253419
|
3 8 6 4 2 1 9 7 5
. . . 5 . . 8 . 4
4 . 5 . . . . 3 1
1 5 8 . . 2 . 4 7
. . 9 . 4 . 1 . .
6 . . 8 . . . 9 .
. 1 . . . 4 7 . 6
. . 2 . . 7 . . .
8 . . 2 5 . 4 1 .
|
3 8 6 4 2 1 9 7 5
7 2 1 5 3 9 8 6 4
4 9 5 6 7 8 2 3 1
1 5 8 3 9 2 6 4 7
2 3 9 7 4 6 1 5 8
6 7 4 8 1 5 3 9 2
5 1 3 9 8 4 7 2 6
9 4 2 1 6 7 5 8 3
8 6 7 2 5 3 4 1 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2105m
|
386421975721539864495678231158392647239746158674815392513984726942167583867253419 #1 Easy (314)
Hidden Single: r3c3=5
Hidden Single: r1c2=8
Hidden Single: r3c9=1
Hidden Single: r4c3=8
Hidden Single: r9c8=1
Hidden Single: r4c8=4
Naked Single: r1c8=7
Naked Single: r1c7=9
Naked Single: r1c1=3
Full House: r1c4=4
Naked Single: r4c1=1
Hidden Single: r2c9=4
Hidden Single: r7c7=7
Hidden Single: r7c6=4
Naked Single: r7c3=3
Naked Single: r7c4=9
Naked Single: r9c3=7
Naked Single: r7c1=5
Naked Single: r7c5=8
Full House: r7c8=2
Naked Single: r2c3=1
Full House: r6c3=4
Naked Single: r8c1=9
Naked Single: r2c8=6
Full House: r3c7=2
Naked Single: r9c2=6
Full House: r8c2=4
Naked Single: r9c6=3
Full House: r9c9=9
Naked Single: r2c6=9
Naked Single: r6c6=5
Naked Single: r5c6=6
Full House: r3c6=8
Naked Single: r6c7=3
Naked Single: r4c4=3
Naked Single: r4c7=6
Full House: r8c7=5
Full House: r4c5=9
Naked Single: r6c9=2
Naked Single: r5c4=7
Full House: r6c5=1
Full House: r6c2=7
Naked Single: r8c8=8
Full House: r5c8=5
Full House: r5c9=8
Full House: r8c9=3
Naked Single: r3c4=6
Full House: r8c4=1
Full House: r8c5=6
Naked Single: r5c1=2
Full House: r2c1=7
Full House: r5c2=3
Naked Single: r2c2=2
Full House: r3c2=9
Full House: r3c5=7
Full House: r2c5=3
|
sudoku_normal_extremely_hard_55
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..6.21..5...5..8..4......3..5...2..7..9.4.1..6..8...9..1......6..2..7...8..25.4..
|
386421975721539864495678231158392647239746158674815392513984726942167583867253419
|
. . 6 . 2 1 . . 5
. . . 5 . . 8 . .
4 . . . . . . 3 .
. 5 . . . 2 . . 7
. . 9 . 4 . 1 . .
6 . . 8 . . . 9 .
. 1 . . . . . . 6
. . 2 . . 7 . . .
8 . . 2 5 . 4 . .
|
3 8 6 4 2 1 9 7 5
7 2 1 5 3 9 8 6 4
4 9 5 6 7 8 2 3 1
1 5 8 3 9 2 6 4 7
2 3 9 7 4 6 1 5 8
6 7 4 8 1 5 3 9 2
5 1 3 9 8 4 7 2 6
9 4 2 1 6 7 5 8 3
8 6 7 2 5 3 4 1 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2105m
|
386421975721539864495678231158392647239746158674815392513984726942167583867253419 #1 Easy (314)
Hidden Single: r3c3=5
Hidden Single: r1c2=8
Hidden Single: r3c9=1
Hidden Single: r4c3=8
Hidden Single: r9c8=1
Hidden Single: r4c8=4
Naked Single: r1c8=7
Naked Single: r1c7=9
Naked Single: r1c1=3
Full House: r1c4=4
Naked Single: r4c1=1
Hidden Single: r2c9=4
Hidden Single: r7c7=7
Hidden Single: r7c6=4
Naked Single: r7c3=3
Naked Single: r7c4=9
Naked Single: r9c3=7
Naked Single: r7c1=5
Naked Single: r7c5=8
Full House: r7c8=2
Naked Single: r2c3=1
Full House: r6c3=4
Naked Single: r8c1=9
Naked Single: r2c8=6
Full House: r3c7=2
Naked Single: r9c2=6
Full House: r8c2=4
Naked Single: r9c6=3
Full House: r9c9=9
Naked Single: r2c6=9
Naked Single: r6c6=5
Naked Single: r5c6=6
Full House: r3c6=8
Naked Single: r6c7=3
Naked Single: r4c4=3
Naked Single: r4c7=6
Full House: r8c7=5
Full House: r4c5=9
Naked Single: r6c9=2
Naked Single: r5c4=7
Full House: r6c5=1
Full House: r6c2=7
Naked Single: r8c8=8
Full House: r5c8=5
Full House: r5c9=8
Full House: r8c9=3
Naked Single: r3c4=6
Full House: r8c4=1
Full House: r8c5=6
Naked Single: r5c1=2
Full House: r2c1=7
Full House: r5c2=3
Naked Single: r2c2=2
Full House: r3c2=9
Full House: r3c5=7
Full House: r2c5=3
|
sudoku_normal_hard_56
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.7.8.49.543..9..1..9...74..964...3...17.6.2.9.25.481.6.524.9....83.7..9.74.1.3...
|
271834965436592817598617423964721358817365249325948176652489731183276594749153682
|
. 7 . 8 . 4 9 . 5
4 3 . . 9 . . 1 .
. 9 . . . 7 4 . .
9 6 4 . . . 3 . .
. 1 7 . 6 . 2 . 9
. 2 5 . 4 8 1 . 6
. 5 2 4 . 9 . . .
. 8 3 . 7 . . 9 .
7 4 . 1 . 3 . . .
|
2 7 1 8 3 4 9 6 5
4 3 6 5 9 2 8 1 7
5 9 8 6 1 7 4 2 3
9 6 4 7 2 1 3 5 8
8 1 7 3 6 5 2 4 9
3 2 5 9 4 8 1 7 6
6 5 2 4 8 9 7 3 1
1 8 3 2 7 6 5 9 4
7 4 9 1 5 3 6 8 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2202e
|
271834965436592817598617423964721358817365249325948176652489731183276594749153682 #1 Easy (294)
Naked Single: r5c2=1
Naked Single: r6c2=2
Naked Single: r4c2=6
Hidden Single: r2c1=4
Hidden Single: r6c5=4
Hidden Single: r9c2=4
Hidden Single: r5c9=9
Hidden Single: r1c7=9
Naked Single: r1c2=7
Hidden Single: r8c3=3
Hidden Single: r7c6=9
Naked Single: r6c6=8
Naked Single: r7c2=5
Full House: r3c2=9
Naked Single: r5c6=5
Naked Single: r6c1=3
Full House: r5c1=8
Naked Single: r6c8=7
Full House: r6c4=9
Naked Single: r7c5=8
Naked Single: r5c4=3
Full House: r5c8=4
Naked Single: r4c9=8
Full House: r4c8=5
Naked Single: r9c9=2
Naked Single: r2c9=7
Naked Single: r3c9=3
Naked Single: r9c5=5
Naked Single: r7c9=1
Full House: r8c9=4
Naked Single: r7c1=6
Naked Single: r7c7=7
Full House: r7c8=3
Naked Single: r8c1=1
Full House: r9c3=9
Naked Single: r1c1=2
Full House: r3c1=5
Naked Single: r1c8=6
Naked Single: r1c3=1
Full House: r1c5=3
Naked Single: r2c7=8
Full House: r3c8=2
Full House: r9c8=8
Full House: r9c7=6
Full House: r8c7=5
Naked Single: r2c3=6
Full House: r3c3=8
Naked Single: r3c4=6
Full House: r3c5=1
Full House: r4c5=2
Naked Single: r2c6=2
Full House: r2c4=5
Naked Single: r8c4=2
Full House: r4c4=7
Full House: r4c6=1
Full House: r8c6=6
|
sudoku_normal_extremely_hard_56
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...8.4..5.3..9..1......74..9.4...3....7.6.2....5...1.6..24......8..7..9.7..1.3...
|
271834965436592817598617423964721358817365249325948176652489731183276594749153682
|
. . . 8 . 4 . . 5
. 3 . . 9 . . 1 .
. . . . . 7 4 . .
9 . 4 . . . 3 . .
. . 7 . 6 . 2 . .
. . 5 . . . 1 . 6
. . 2 4 . . . . .
. 8 . . 7 . . 9 .
7 . . 1 . 3 . . .
|
2 7 1 8 3 4 9 6 5
4 3 6 5 9 2 8 1 7
5 9 8 6 1 7 4 2 3
9 6 4 7 2 1 3 5 8
8 1 7 3 6 5 2 4 9
3 2 5 9 4 8 1 7 6
6 5 2 4 8 9 7 3 1
1 8 3 2 7 6 5 9 4
7 4 9 1 5 3 6 8 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2202e
|
271834965436592817598617423964721358817365249325948176652489731183276594749153682 #1 Easy (294)
Naked Single: r5c2=1
Naked Single: r6c2=2
Naked Single: r4c2=6
Hidden Single: r2c1=4
Hidden Single: r6c5=4
Hidden Single: r9c2=4
Hidden Single: r5c9=9
Hidden Single: r1c7=9
Naked Single: r1c2=7
Hidden Single: r8c3=3
Hidden Single: r7c6=9
Naked Single: r6c6=8
Naked Single: r7c2=5
Full House: r3c2=9
Naked Single: r5c6=5
Naked Single: r6c1=3
Full House: r5c1=8
Naked Single: r6c8=7
Full House: r6c4=9
Naked Single: r7c5=8
Naked Single: r5c4=3
Full House: r5c8=4
Naked Single: r4c9=8
Full House: r4c8=5
Naked Single: r9c9=2
Naked Single: r2c9=7
Naked Single: r3c9=3
Naked Single: r9c5=5
Naked Single: r7c9=1
Full House: r8c9=4
Naked Single: r7c1=6
Naked Single: r7c7=7
Full House: r7c8=3
Naked Single: r8c1=1
Full House: r9c3=9
Naked Single: r1c1=2
Full House: r3c1=5
Naked Single: r1c8=6
Naked Single: r1c3=1
Full House: r1c5=3
Naked Single: r2c7=8
Full House: r3c8=2
Full House: r9c8=8
Full House: r9c7=6
Full House: r8c7=5
Naked Single: r2c3=6
Full House: r3c3=8
Naked Single: r3c4=6
Full House: r3c5=1
Full House: r4c5=2
Naked Single: r2c6=2
Full House: r2c4=5
Naked Single: r8c4=2
Full House: r4c4=7
Full House: r4c6=1
Full House: r8c6=6
|
sudoku_normal_hard_57
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
7.32.6....461.93.71.9.4.6.597.6....8..5.7.96.36...175..32.1.5.66..4...3.....63...
|
783256149546189327129347685974635218215874963368921754432718596657492831891563472
|
7 . 3 2 . 6 . . .
. 4 6 1 . 9 3 . 7
1 . 9 . 4 . 6 . 5
9 7 . 6 . . . . 8
. . 5 . 7 . 9 6 .
3 6 . . . 1 7 5 .
. 3 2 . 1 . 5 . 6
6 . . 4 . . . 3 .
. . . . 6 3 . . .
|
7 8 3 2 5 6 1 4 9
5 4 6 1 8 9 3 2 7
1 2 9 3 4 7 6 8 5
9 7 4 6 3 5 2 1 8
2 1 5 8 7 4 9 6 3
3 6 8 9 2 1 7 5 4
4 3 2 7 1 8 5 9 6
6 5 7 4 9 2 8 3 1
8 9 1 5 6 3 4 7 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1905h
|
783256149546189327129347685974635218215874963368921754432718596657492831891563472 #1 Medium (384)
Hidden Single: r6c7=7
Hidden Single: r2c4=1
Hidden Single: r5c8=6
Hidden Single: r7c2=3
Hidden Single: r9c5=6
Hidden Single: r1c6=6
Hidden Single: r2c3=6
Hidden Single: r6c2=6
Hidden Single: r1c3=3
Hidden Single: r4c1=9
Hidden Single: r1c1=7
Locked Pair: 2,8 in r23c8 => r1c78,r2c7,r79c8<>8, r2c7,r3c9,r49c8<>2
Naked Single: r2c7=3
Naked Single: r3c9=5
Hidden Single: r4c5=3
Naked Single: r5c4=8
Naked Single: r6c4=9
Naked Single: r6c5=2
Naked Single: r7c4=7
Naked Single: r5c6=4
Full House: r4c6=5
Naked Single: r6c9=4
Full House: r6c3=8
Naked Single: r3c4=3
Full House: r9c4=5
Naked Single: r7c6=8
Naked Single: r5c1=2
Naked Single: r4c8=1
Naked Single: r3c6=7
Full House: r8c6=2
Full House: r8c5=9
Naked Single: r7c1=4
Full House: r7c8=9
Naked Single: r5c2=1
Full House: r4c3=4
Full House: r4c7=2
Full House: r5c9=3
Naked Single: r8c9=1
Naked Single: r9c1=8
Full House: r2c1=5
Naked Single: r1c8=4
Naked Single: r1c9=9
Full House: r9c9=2
Naked Single: r8c3=7
Full House: r9c3=1
Naked Single: r8c7=8
Full House: r8c2=5
Full House: r9c2=9
Naked Single: r9c7=4
Full House: r1c7=1
Full House: r9c8=7
Naked Single: r1c2=8
Full House: r1c5=5
Full House: r2c5=8
Full House: r3c2=2
Full House: r2c8=2
Full House: r3c8=8
|
sudoku_normal_extremely_hard_57
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...2......4...9..71.9.4.6...7.6....8..5.7.9..3....1.5...2.1.5.66..4...3......3...
|
783256149546189327129347685974635218215874963368921754432718596657492831891563472
|
. . . 2 . . . . .
. 4 . . . 9 . . 7
1 . 9 . 4 . 6 . .
. 7 . 6 . . . . 8
. . 5 . 7 . 9 . .
3 . . . . 1 . 5 .
. . 2 . 1 . 5 . 6
6 . . 4 . . . 3 .
. . . . . 3 . . .
|
7 8 3 2 5 6 1 4 9
5 4 6 1 8 9 3 2 7
1 2 9 3 4 7 6 8 5
9 7 4 6 3 5 2 1 8
2 1 5 8 7 4 9 6 3
3 6 8 9 2 1 7 5 4
4 3 2 7 1 8 5 9 6
6 5 7 4 9 2 8 3 1
8 9 1 5 6 3 4 7 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1905h
|
783256149546189327129347685974635218215874963368921754432718596657492831891563472 #1 Medium (384)
Hidden Single: r6c7=7
Hidden Single: r2c4=1
Hidden Single: r5c8=6
Hidden Single: r7c2=3
Hidden Single: r9c5=6
Hidden Single: r1c6=6
Hidden Single: r2c3=6
Hidden Single: r6c2=6
Hidden Single: r1c3=3
Hidden Single: r4c1=9
Hidden Single: r1c1=7
Locked Pair: 2,8 in r23c8 => r1c78,r2c7,r79c8<>8, r2c7,r3c9,r49c8<>2
Naked Single: r2c7=3
Naked Single: r3c9=5
Hidden Single: r4c5=3
Naked Single: r5c4=8
Naked Single: r6c4=9
Naked Single: r6c5=2
Naked Single: r7c4=7
Naked Single: r5c6=4
Full House: r4c6=5
Naked Single: r6c9=4
Full House: r6c3=8
Naked Single: r3c4=3
Full House: r9c4=5
Naked Single: r7c6=8
Naked Single: r5c1=2
Naked Single: r4c8=1
Naked Single: r3c6=7
Full House: r8c6=2
Full House: r8c5=9
Naked Single: r7c1=4
Full House: r7c8=9
Naked Single: r5c2=1
Full House: r4c3=4
Full House: r4c7=2
Full House: r5c9=3
Naked Single: r8c9=1
Naked Single: r9c1=8
Full House: r2c1=5
Naked Single: r1c8=4
Naked Single: r1c9=9
Full House: r9c9=2
Naked Single: r8c3=7
Full House: r9c3=1
Naked Single: r8c7=8
Full House: r8c2=5
Full House: r9c2=9
Naked Single: r9c7=4
Full House: r1c7=1
Full House: r9c8=7
Naked Single: r1c2=8
Full House: r1c5=5
Full House: r2c5=8
Full House: r3c2=2
Full House: r2c8=2
Full House: r3c8=8
|
sudoku_normal_hard_58
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..4..6.2..93..28656...3.74.2..7...9...8.1.67..376.4..8..1.679.43..9.1.87.79...1.6
|
754896321193472865682135749216758493548319672937624518821567934365941287479283156
|
. . 4 . . 6 . 2 .
. 9 3 . . 2 8 6 5
6 . . . 3 . 7 4 .
2 . . 7 . . . 9 .
. . 8 . 1 . 6 7 .
. 3 7 6 . 4 . . 8
. . 1 . 6 7 9 . 4
3 . . 9 . 1 . 8 7
. 7 9 . . . 1 . 6
|
7 5 4 8 9 6 3 2 1
1 9 3 4 7 2 8 6 5
6 8 2 1 3 5 7 4 9
2 1 6 7 5 8 4 9 3
5 4 8 3 1 9 6 7 2
9 3 7 6 2 4 5 1 8
8 2 1 5 6 7 9 3 4
3 6 5 9 4 1 2 8 7
4 7 9 2 8 3 1 5 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2312m
|
754896321193472865682135749216758493548319672937624518821567934365941287479283156 #1 Easy (444)
Hidden Single: r2c3=3
Hidden Single: r8c6=1
Hidden Single: r6c3=7
Hidden Single: r6c4=6
Hidden Single: r9c3=9
Hidden Single: r2c8=6
Hidden Single: r1c6=6
Hidden Single: r7c7=9
Hidden Single: r9c9=6
Hidden Single: r7c6=7
Hidden Single: r5c8=7
Hidden Single: r8c9=7
Hidden Single: r3c8=4
Naked Single: r2c7=8
Naked Single: r1c7=3
Hidden Single: r4c7=4
Hidden Single: r5c9=2
Naked Single: r6c7=5
Full House: r8c7=2
Naked Single: r6c8=1
Full House: r4c9=3
Naked Single: r6c1=9
Full House: r6c5=2
Hidden Single: r3c3=2
Hidden Single: r7c2=2
Hidden Single: r4c2=1
Hidden Single: r5c6=9
Hidden Single: r1c5=9
Naked Single: r1c9=1
Full House: r3c9=9
Hidden Single: r9c4=2
Hidden Single: r4c3=6
Full House: r8c3=5
Naked Single: r7c1=8
Naked Single: r8c5=4
Full House: r8c2=6
Full House: r9c1=4
Naked Single: r2c5=7
Naked Single: r5c1=5
Full House: r5c2=4
Full House: r5c4=3
Naked Single: r2c1=1
Full House: r1c1=7
Full House: r2c4=4
Naked Single: r7c4=5
Full House: r7c8=3
Full House: r9c8=5
Naked Single: r1c4=8
Full House: r1c2=5
Full House: r3c4=1
Full House: r3c6=5
Full House: r3c2=8
Naked Single: r9c5=8
Full House: r4c5=5
Full House: r4c6=8
Full House: r9c6=3
|
sudoku_normal_extremely_hard_58
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..4....2..9...2..56...3.7..2..7...9...8.1.6...3...4..8..1.6...43..9...8..7....1..
|
754896321193472865682135749216758493548319672937624518821567934365941287479283156
|
. . 4 . . . . 2 .
. 9 . . . 2 . . 5
6 . . . 3 . 7 . .
2 . . 7 . . . 9 .
. . 8 . 1 . 6 . .
. 3 . . . 4 . . 8
. . 1 . 6 . . . 4
3 . . 9 . . . 8 .
. 7 . . . . 1 . .
|
7 5 4 8 9 6 3 2 1
1 9 3 4 7 2 8 6 5
6 8 2 1 3 5 7 4 9
2 1 6 7 5 8 4 9 3
5 4 8 3 1 9 6 7 2
9 3 7 6 2 4 5 1 8
8 2 1 5 6 7 9 3 4
3 6 5 9 4 1 2 8 7
4 7 9 2 8 3 1 5 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2312m
|
754896321193472865682135749216758493548319672937624518821567934365941287479283156 #1 Easy (444)
Hidden Single: r2c3=3
Hidden Single: r8c6=1
Hidden Single: r6c3=7
Hidden Single: r6c4=6
Hidden Single: r9c3=9
Hidden Single: r2c8=6
Hidden Single: r1c6=6
Hidden Single: r7c7=9
Hidden Single: r9c9=6
Hidden Single: r7c6=7
Hidden Single: r5c8=7
Hidden Single: r8c9=7
Hidden Single: r3c8=4
Naked Single: r2c7=8
Naked Single: r1c7=3
Hidden Single: r4c7=4
Hidden Single: r5c9=2
Naked Single: r6c7=5
Full House: r8c7=2
Naked Single: r6c8=1
Full House: r4c9=3
Naked Single: r6c1=9
Full House: r6c5=2
Hidden Single: r3c3=2
Hidden Single: r7c2=2
Hidden Single: r4c2=1
Hidden Single: r5c6=9
Hidden Single: r1c5=9
Naked Single: r1c9=1
Full House: r3c9=9
Hidden Single: r9c4=2
Hidden Single: r4c3=6
Full House: r8c3=5
Naked Single: r7c1=8
Naked Single: r8c5=4
Full House: r8c2=6
Full House: r9c1=4
Naked Single: r2c5=7
Naked Single: r5c1=5
Full House: r5c2=4
Full House: r5c4=3
Naked Single: r2c1=1
Full House: r1c1=7
Full House: r2c4=4
Naked Single: r7c4=5
Full House: r7c8=3
Full House: r9c8=5
Naked Single: r1c4=8
Full House: r1c2=5
Full House: r3c4=1
Full House: r3c6=5
Full House: r3c2=8
Naked Single: r9c5=8
Full House: r4c5=5
Full House: r4c6=8
Full House: r9c6=3
|
sudoku_normal_hard_59
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
345..8..16291..3..781.3..9...46....9.3.....1.9....72..4137629858.2..31745..4..6..
|
345298761629174358781536492174625839236849517958317246413762985862953174597481623
|
3 4 5 . . 8 . . 1
6 2 9 1 . . 3 . .
7 8 1 . 3 . . 9 .
. . 4 6 . . . . 9
. 3 . . . . . 1 .
9 . . . . 7 2 . .
4 1 3 7 6 2 9 8 5
8 . 2 . . 3 1 7 4
5 . . 4 . . 6 . .
|
3 4 5 2 9 8 7 6 1
6 2 9 1 7 4 3 5 8
7 8 1 5 3 6 4 9 2
1 7 4 6 2 5 8 3 9
2 3 6 8 4 9 5 1 7
9 5 8 3 1 7 2 4 6
4 1 3 7 6 2 9 8 5
8 6 2 9 5 3 1 7 4
5 9 7 4 8 1 6 2 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2310e
|
345298761629174358781536492174625839236849517958317246413762985862953174597481623 #1 Easy (212)
Naked Single: r8c9=4
Naked Single: r7c7=9
Naked Single: r7c6=2
Naked Single: r8c7=1
Naked Single: r7c4=7
Naked Single: r7c3=3
Full House: r7c1=4
Naked Single: r2c1=6
Naked Single: r1c1=3
Naked Single: r2c3=9
Naked Single: r3c3=1
Full House: r1c2=4
Naked Single: r8c1=8
Naked Single: r1c7=7
Naked Single: r5c1=2
Full House: r4c1=1
Naked Single: r9c3=7
Naked Single: r2c9=8
Naked Single: r4c6=5
Naked Single: r9c2=9
Full House: r8c2=6
Naked Single: r2c6=4
Naked Single: r4c2=7
Full House: r6c2=5
Naked Single: r4c7=8
Naked Single: r4c8=3
Full House: r4c5=2
Naked Single: r9c6=1
Naked Single: r2c8=5
Full House: r2c5=7
Naked Single: r3c6=6
Full House: r5c6=9
Naked Single: r6c9=6
Naked Single: r9c8=2
Full House: r9c9=3
Full House: r9c5=8
Naked Single: r1c5=9
Naked Single: r3c7=4
Full House: r5c7=5
Naked Single: r3c9=2
Full House: r5c9=7
Full House: r6c8=4
Full House: r1c8=6
Full House: r1c4=2
Full House: r3c4=5
Naked Single: r5c4=8
Naked Single: r6c3=8
Full House: r5c3=6
Full House: r5c5=4
Naked Single: r8c5=5
Full House: r6c5=1
Full House: r8c4=9
Full House: r6c4=3
|
sudoku_normal_extremely_hard_59
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..5..8..1.2.1..3..78..3..9...46....9.3.....1.9....72...1..6..85..2..3.7.5..4..6..
|
345298761629174358781536492174625839236849517958317246413762985862953174597481623
|
. . 5 . . 8 . . 1
. 2 . 1 . . 3 . .
7 8 . . 3 . . 9 .
. . 4 6 . . . . 9
. 3 . . . . . 1 .
9 . . . . 7 2 . .
. 1 . . 6 . . 8 5
. . 2 . . 3 . 7 .
5 . . 4 . . 6 . .
|
3 4 5 2 9 8 7 6 1
6 2 9 1 7 4 3 5 8
7 8 1 5 3 6 4 9 2
1 7 4 6 2 5 8 3 9
2 3 6 8 4 9 5 1 7
9 5 8 3 1 7 2 4 6
4 1 3 7 6 2 9 8 5
8 6 2 9 5 3 1 7 4
5 9 7 4 8 1 6 2 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2310e
|
345298761629174358781536492174625839236849517958317246413762985862953174597481623 #1 Easy (212)
Naked Single: r8c9=4
Naked Single: r7c7=9
Naked Single: r7c6=2
Naked Single: r8c7=1
Naked Single: r7c4=7
Naked Single: r7c3=3
Full House: r7c1=4
Naked Single: r2c1=6
Naked Single: r1c1=3
Naked Single: r2c3=9
Naked Single: r3c3=1
Full House: r1c2=4
Naked Single: r8c1=8
Naked Single: r1c7=7
Naked Single: r5c1=2
Full House: r4c1=1
Naked Single: r9c3=7
Naked Single: r2c9=8
Naked Single: r4c6=5
Naked Single: r9c2=9
Full House: r8c2=6
Naked Single: r2c6=4
Naked Single: r4c2=7
Full House: r6c2=5
Naked Single: r4c7=8
Naked Single: r4c8=3
Full House: r4c5=2
Naked Single: r9c6=1
Naked Single: r2c8=5
Full House: r2c5=7
Naked Single: r3c6=6
Full House: r5c6=9
Naked Single: r6c9=6
Naked Single: r9c8=2
Full House: r9c9=3
Full House: r9c5=8
Naked Single: r1c5=9
Naked Single: r3c7=4
Full House: r5c7=5
Naked Single: r3c9=2
Full House: r5c9=7
Full House: r6c8=4
Full House: r1c8=6
Full House: r1c4=2
Full House: r3c4=5
Naked Single: r5c4=8
Naked Single: r6c3=8
Full House: r5c3=6
Full House: r5c5=4
Naked Single: r8c5=5
Full House: r6c5=1
Full House: r8c4=9
Full House: r6c4=3
|
sudoku_normal_hard_60
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
97.6..3.2..8..36.731..7.4..1.7....3.53.8.17.9.8.3.71....3.6..7.7..9..5.38..7.29.6
|
975684312428153697316279485147596238532841769689327154293465871764918523851732946
|
9 7 . 6 . . 3 . 2
. . 8 . . 3 6 . 7
3 1 . . 7 . 4 . .
1 . 7 . . . . 3 .
5 3 . 8 . 1 7 . 9
. 8 . 3 . 7 1 . .
. . 3 . 6 . . 7 .
7 . . 9 . . 5 . 3
8 . . 7 . 2 9 . 6
|
9 7 5 6 8 4 3 1 2
4 2 8 1 5 3 6 9 7
3 1 6 2 7 9 4 8 5
1 4 7 5 9 6 2 3 8
5 3 2 8 4 1 7 6 9
6 8 9 3 2 7 1 5 4
2 9 3 4 6 5 8 7 1
7 6 4 9 1 8 5 2 3
8 5 1 7 3 2 9 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304m
|
975684312428153697316279485147596238532841769689327154293465871764918523851732946 #1 Easy (528)
Hidden Single: r4c1=1
Hidden Single: r5c7=7
Hidden Single: r1c2=7
Hidden Single: r2c9=7
Hidden Single: r8c1=7
Hidden Single: r9c4=7
Hidden Single: r1c7=3
Naked Single: r9c7=9
Naked Single: r2c7=6
Hidden Single: r5c2=3
Hidden Single: r3c1=3
Hidden Single: r6c6=7
Hidden Single: r6c4=3
Hidden Single: r8c9=3
Hidden Single: r9c5=3
Hidden Single: r7c2=9
Hidden Single: r6c3=9
Hidden Single: r3c3=6
Hidden Single: r6c1=6
Hidden Single: r4c6=6
Hidden Single: r7c9=1
Naked Single: r9c8=4
Naked Single: r9c2=5
Full House: r9c3=1
Hidden Single: r5c8=6
Hidden Single: r8c2=6
Hidden Single: r3c4=2
Hidden Single: r4c5=9
Hidden Single: r3c6=9
Hidden Single: r2c4=1
Hidden Single: r8c5=1
Hidden Single: r1c3=5
Hidden Single: r2c8=9
Hidden Single: r1c8=1
Hidden Single: r1c5=8
Full House: r1c6=4
Full House: r2c5=5
Naked Single: r8c6=8
Full House: r7c6=5
Full House: r7c4=4
Full House: r4c4=5
Naked Single: r8c8=2
Full House: r7c7=8
Full House: r7c1=2
Full House: r8c3=4
Full House: r4c7=2
Full House: r2c1=4
Full House: r5c3=2
Full House: r4c2=4
Full House: r2c2=2
Full House: r5c5=4
Full House: r4c9=8
Full House: r6c5=2
Naked Single: r6c8=5
Full House: r3c8=8
Full House: r3c9=5
Full House: r6c9=4
|
sudoku_normal_extremely_hard_60
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9..6....2..8..3....1..7.4....7....3.5..8.1..9.8....1....3.6..7....9..5..8....2..6
|
975684312428153697316279485147596238532841769689327154293465871764918523851732946
|
9 . . 6 . . . . 2
. . 8 . . 3 . . .
. 1 . . 7 . 4 . .
. . 7 . . . . 3 .
5 . . 8 . 1 . . 9
. 8 . . . . 1 . .
. . 3 . 6 . . 7 .
. . . 9 . . 5 . .
8 . . . . 2 . . 6
|
9 7 5 6 8 4 3 1 2
4 2 8 1 5 3 6 9 7
3 1 6 2 7 9 4 8 5
1 4 7 5 9 6 2 3 8
5 3 2 8 4 1 7 6 9
6 8 9 3 2 7 1 5 4
2 9 3 4 6 5 8 7 1
7 6 4 9 1 8 5 2 3
8 5 1 7 3 2 9 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304m
|
975684312428153697316279485147596238532841769689327154293465871764918523851732946 #1 Easy (528)
Hidden Single: r4c1=1
Hidden Single: r5c7=7
Hidden Single: r1c2=7
Hidden Single: r2c9=7
Hidden Single: r8c1=7
Hidden Single: r9c4=7
Hidden Single: r1c7=3
Naked Single: r9c7=9
Naked Single: r2c7=6
Hidden Single: r5c2=3
Hidden Single: r3c1=3
Hidden Single: r6c6=7
Hidden Single: r6c4=3
Hidden Single: r8c9=3
Hidden Single: r9c5=3
Hidden Single: r7c2=9
Hidden Single: r6c3=9
Hidden Single: r3c3=6
Hidden Single: r6c1=6
Hidden Single: r4c6=6
Hidden Single: r7c9=1
Naked Single: r9c8=4
Naked Single: r9c2=5
Full House: r9c3=1
Hidden Single: r5c8=6
Hidden Single: r8c2=6
Hidden Single: r3c4=2
Hidden Single: r4c5=9
Hidden Single: r3c6=9
Hidden Single: r2c4=1
Hidden Single: r8c5=1
Hidden Single: r1c3=5
Hidden Single: r2c8=9
Hidden Single: r1c8=1
Hidden Single: r1c5=8
Full House: r1c6=4
Full House: r2c5=5
Naked Single: r8c6=8
Full House: r7c6=5
Full House: r7c4=4
Full House: r4c4=5
Naked Single: r8c8=2
Full House: r7c7=8
Full House: r7c1=2
Full House: r8c3=4
Full House: r4c7=2
Full House: r2c1=4
Full House: r5c3=2
Full House: r4c2=4
Full House: r2c2=2
Full House: r5c5=4
Full House: r4c9=8
Full House: r6c5=2
Naked Single: r6c8=5
Full House: r3c8=8
Full House: r3c9=5
Full House: r6c9=4
|
sudoku_normal_hard_61
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
....1..929..7..3....19.8.47.598..27.7...9...5..2.7698..453..7..2.6..1..98.3.67...
|
387614592964725318521938647659843271738192465412576983145389726276451839893267154
|
. . . . 1 . . 9 2
9 . . 7 . . 3 . .
. . 1 9 . 8 . 4 7
. 5 9 8 . . 2 7 .
7 . . . 9 . . . 5
. . 2 . 7 6 9 8 .
. 4 5 3 . . 7 . .
2 . 6 . . 1 . . 9
8 . 3 . 6 7 . . .
|
3 8 7 6 1 4 5 9 2
9 6 4 7 2 5 3 1 8
5 2 1 9 3 8 6 4 7
6 5 9 8 4 3 2 7 1
7 3 8 1 9 2 4 6 5
4 1 2 5 7 6 9 8 3
1 4 5 3 8 9 7 2 6
2 7 6 4 5 1 8 3 9
8 9 3 2 6 7 1 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2006h3
|
387614592964725318521938647659843271738192465412576983145389726276451839893267154 #1 Medium (494)
Hidden Pair: 7,9 in r14c8 => r1c8<>5, r14c8<>6, r4c8<>1, r4c8<>3
Hidden Pair: 1,6 in r4c19 => r4c19<>3, r4c19<>4, r4c9<>7
Naked Triple: 1,6,8 in r247c9 => r3c9<>6, r69c9<>1
Naked Single: r3c9=7
Naked Single: r1c8=9
Naked Single: r4c8=7
Hidden Single: r6c5=7
Hidden Single: r3c4=9
Hidden Single: r6c7=9
Hidden Single: r4c3=9
Naked Single: r7c3=5
Hidden Single: r9c6=7
Naked Single: r9c3=3
Naked Single: r8c1=2
Naked Single: r9c9=4
Naked Single: r7c1=1
Naked Single: r8c2=7
Full House: r9c2=9
Naked Single: r6c9=3
Naked Single: r4c1=6
Naked Single: r6c1=4
Naked Single: r6c2=1
Full House: r6c4=5
Naked Single: r4c9=1
Naked Single: r5c3=8
Full House: r5c2=3
Naked Single: r8c4=4
Naked Single: r9c4=2
Naked Single: r5c8=6
Full House: r5c7=4
Naked Single: r2c3=4
Full House: r1c3=7
Naked Single: r1c4=6
Full House: r5c4=1
Full House: r5c6=2
Naked Single: r7c5=8
Naked Single: r7c6=9
Full House: r8c5=5
Naked Single: r7c8=2
Full House: r7c9=6
Full House: r2c9=8
Naked Single: r1c2=8
Naked Single: r2c6=5
Naked Single: r2c5=2
Naked Single: r8c7=8
Full House: r8c8=3
Naked Single: r1c7=5
Naked Single: r2c8=1
Full House: r2c2=6
Full House: r3c7=6
Full House: r9c7=1
Full House: r9c8=5
Full House: r3c2=2
Naked Single: r3c5=3
Full House: r1c6=4
Full House: r1c1=3
Full House: r3c1=5
Full House: r4c5=4
Full House: r4c6=3
|
sudoku_normal_extremely_hard_61
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
....1...29..7..3....1..8.4..5.8..2..7...9...5..2..6.8..4.3..7....6..1..98...6....
|
387614592964725318521938647659843271738192465412576983145389726276451839893267154
|
. . . . 1 . . . 2
9 . . 7 . . 3 . .
. . 1 . . 8 . 4 .
. 5 . 8 . . 2 . .
7 . . . 9 . . . 5
. . 2 . . 6 . 8 .
. 4 . 3 . . 7 . .
. . 6 . . 1 . . 9
8 . . . 6 . . . .
|
3 8 7 6 1 4 5 9 2
9 6 4 7 2 5 3 1 8
5 2 1 9 3 8 6 4 7
6 5 9 8 4 3 2 7 1
7 3 8 1 9 2 4 6 5
4 1 2 5 7 6 9 8 3
1 4 5 3 8 9 7 2 6
2 7 6 4 5 1 8 3 9
8 9 3 2 6 7 1 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2006h3
|
387614592964725318521938647659843271738192465412576983145389726276451839893267154 #1 Medium (494)
Hidden Pair: 7,9 in r14c8 => r1c8<>5, r14c8<>6, r4c8<>1, r4c8<>3
Hidden Pair: 1,6 in r4c19 => r4c19<>3, r4c19<>4, r4c9<>7
Naked Triple: 1,6,8 in r247c9 => r3c9<>6, r69c9<>1
Naked Single: r3c9=7
Naked Single: r1c8=9
Naked Single: r4c8=7
Hidden Single: r6c5=7
Hidden Single: r3c4=9
Hidden Single: r6c7=9
Hidden Single: r4c3=9
Naked Single: r7c3=5
Hidden Single: r9c6=7
Naked Single: r9c3=3
Naked Single: r8c1=2
Naked Single: r9c9=4
Naked Single: r7c1=1
Naked Single: r8c2=7
Full House: r9c2=9
Naked Single: r6c9=3
Naked Single: r4c1=6
Naked Single: r6c1=4
Naked Single: r6c2=1
Full House: r6c4=5
Naked Single: r4c9=1
Naked Single: r5c3=8
Full House: r5c2=3
Naked Single: r8c4=4
Naked Single: r9c4=2
Naked Single: r5c8=6
Full House: r5c7=4
Naked Single: r2c3=4
Full House: r1c3=7
Naked Single: r1c4=6
Full House: r5c4=1
Full House: r5c6=2
Naked Single: r7c5=8
Naked Single: r7c6=9
Full House: r8c5=5
Naked Single: r7c8=2
Full House: r7c9=6
Full House: r2c9=8
Naked Single: r1c2=8
Naked Single: r2c6=5
Naked Single: r2c5=2
Naked Single: r8c7=8
Full House: r8c8=3
Naked Single: r1c7=5
Naked Single: r2c8=1
Full House: r2c2=6
Full House: r3c7=6
Full House: r9c7=1
Full House: r9c8=5
Full House: r3c2=2
Naked Single: r3c5=3
Full House: r1c6=4
Full House: r1c1=3
Full House: r3c1=5
Full House: r4c5=4
Full House: r4c6=3
|
sudoku_normal_hard_62
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
819247.63763..5..15423.67..9.1....8.4...6....63....2.5.96..4.7.2.41..9...8...9..4
|
819247563763985421542316798921453687475862319638791245196534872254178936387629154
|
8 1 9 2 4 7 . 6 3
7 6 3 . . 5 . . 1
5 4 2 3 . 6 7 . .
9 . 1 . . . . 8 .
4 . . . 6 . . . .
6 3 . . . . 2 . 5
. 9 6 . . 4 . 7 .
2 . 4 1 . . 9 . .
. 8 . . . 9 . . 4
|
8 1 9 2 4 7 5 6 3
7 6 3 9 8 5 4 2 1
5 4 2 3 1 6 7 9 8
9 2 1 4 5 3 6 8 7
4 7 5 8 6 2 3 1 9
6 3 8 7 9 1 2 4 5
1 9 6 5 3 4 8 7 2
2 5 4 1 7 8 9 3 6
3 8 7 6 2 9 1 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2305m
|
819247563763985421542316798921453687475862319638791245196534872254178936387629154 #1 Easy (314)
Hidden Single: r6c1=6
Naked Single: r2c1=7
Hidden Single: r7c2=9
Hidden Single: r8c3=4
Hidden Single: r3c6=6
Hidden Single: r2c2=6
Hidden Single: r5c1=4
Hidden Single: r1c2=1
Naked Single: r1c6=7
Naked Single: r3c1=5
Naked Single: r1c3=9
Full House: r3c3=2
Naked Single: r1c5=4
Naked Single: r1c9=3
Full House: r1c7=5
Naked Single: r3c8=9
Naked Single: r3c9=8
Full House: r3c5=1
Naked Single: r2c7=4
Full House: r2c8=2
Naked Single: r7c9=2
Naked Single: r8c9=6
Naked Single: r4c9=7
Full House: r5c9=9
Hidden Single: r9c4=6
Hidden Single: r7c7=8
Naked Single: r7c4=5
Naked Single: r4c4=4
Naked Single: r7c5=3
Full House: r7c1=1
Full House: r9c1=3
Naked Single: r8c6=8
Naked Single: r9c7=1
Naked Single: r6c6=1
Naked Single: r8c5=7
Full House: r9c5=2
Naked Single: r5c7=3
Full House: r4c7=6
Naked Single: r9c8=5
Full House: r8c8=3
Full House: r8c2=5
Full House: r9c3=7
Naked Single: r6c8=4
Full House: r5c8=1
Naked Single: r4c5=5
Naked Single: r5c6=2
Full House: r4c6=3
Full House: r4c2=2
Full House: r5c2=7
Naked Single: r6c3=8
Full House: r5c3=5
Full House: r5c4=8
Naked Single: r6c5=9
Full House: r2c5=8
Full House: r2c4=9
Full House: r6c4=7
|
sudoku_normal_extremely_hard_62
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
8..2...6...3..5..1.4.3..7..9.1....8.....6.....3....2.5..6..4.7.2..1..9...8...9..4
|
819247563763985421542316798921453687475862319638791245196534872254178936387629154
|
8 . . 2 . . . 6 .
. . 3 . . 5 . . 1
. 4 . 3 . . 7 . .
9 . 1 . . . . 8 .
. . . . 6 . . . .
. 3 . . . . 2 . 5
. . 6 . . 4 . 7 .
2 . . 1 . . 9 . .
. 8 . . . 9 . . 4
|
8 1 9 2 4 7 5 6 3
7 6 3 9 8 5 4 2 1
5 4 2 3 1 6 7 9 8
9 2 1 4 5 3 6 8 7
4 7 5 8 6 2 3 1 9
6 3 8 7 9 1 2 4 5
1 9 6 5 3 4 8 7 2
2 5 4 1 7 8 9 3 6
3 8 7 6 2 9 1 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2305m
|
819247563763985421542316798921453687475862319638791245196534872254178936387629154 #1 Easy (314)
Hidden Single: r6c1=6
Naked Single: r2c1=7
Hidden Single: r7c2=9
Hidden Single: r8c3=4
Hidden Single: r3c6=6
Hidden Single: r2c2=6
Hidden Single: r5c1=4
Hidden Single: r1c2=1
Naked Single: r1c6=7
Naked Single: r3c1=5
Naked Single: r1c3=9
Full House: r3c3=2
Naked Single: r1c5=4
Naked Single: r1c9=3
Full House: r1c7=5
Naked Single: r3c8=9
Naked Single: r3c9=8
Full House: r3c5=1
Naked Single: r2c7=4
Full House: r2c8=2
Naked Single: r7c9=2
Naked Single: r8c9=6
Naked Single: r4c9=7
Full House: r5c9=9
Hidden Single: r9c4=6
Hidden Single: r7c7=8
Naked Single: r7c4=5
Naked Single: r4c4=4
Naked Single: r7c5=3
Full House: r7c1=1
Full House: r9c1=3
Naked Single: r8c6=8
Naked Single: r9c7=1
Naked Single: r6c6=1
Naked Single: r8c5=7
Full House: r9c5=2
Naked Single: r5c7=3
Full House: r4c7=6
Naked Single: r9c8=5
Full House: r8c8=3
Full House: r8c2=5
Full House: r9c3=7
Naked Single: r6c8=4
Full House: r5c8=1
Naked Single: r4c5=5
Naked Single: r5c6=2
Full House: r4c6=3
Full House: r4c2=2
Full House: r5c2=7
Naked Single: r6c3=8
Full House: r5c3=5
Full House: r5c4=8
Naked Single: r6c5=9
Full House: r2c5=8
Full House: r2c4=9
Full House: r6c4=7
|
sudoku_normal_hard_63
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...7....4231945678745.86...4..6..1...8...4.2...2..9..6.24.1.7...5.49..619....3...
|
869721534231945678745386912493652187586174329172839456624518793358497261917263845
|
. . . 7 . . . . 4
2 3 1 9 4 5 6 7 8
7 4 5 . 8 6 . . .
4 . . 6 . . 1 . .
. 8 . . . 4 . 2 .
. . 2 . . 9 . . 6
. 2 4 . 1 . 7 . .
. 5 . 4 9 . . 6 1
9 . . . . 3 . . .
|
8 6 9 7 2 1 5 3 4
2 3 1 9 4 5 6 7 8
7 4 5 3 8 6 9 1 2
4 9 3 6 5 2 1 8 7
5 8 6 1 7 4 3 2 9
1 7 2 8 3 9 4 5 6
6 2 4 5 1 8 7 9 3
3 5 8 4 9 7 2 6 1
9 1 7 2 6 3 8 4 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2307h3
|
869721534231945678745386912493652187586174329172839456624518793358497261917263845 #1 Medium (458)
Hidden Triple: 1,6,7 in r9c235 => r9c25<>2, r9c23<>4, r9c3<>8, r9c5<>5
Hidden Single: r7c2=2
Hidden Single: r3c2=4
Hidden Single: r7c3=4
Hidden Single: r2c5=4
Hidden Single: r5c6=4
Hidden Single: r3c1=7
Locked Candidates Type 1 (Pointing): 1 in b5 => r23c4<>1
Naked Single: r2c4=9
Naked Single: r2c9=8
Naked Single: r2c7=6
Full House: r2c3=1
Hidden Single: r8c5=9
Hidden Single: r3c6=6
Naked Single: r7c6=8
Naked Single: r7c4=5
Naked Single: r9c4=2
Naked Single: r3c4=3
Naked Single: r8c6=7
Full House: r9c5=6
Naked Single: r9c9=5
Naked Single: r1c5=2
Full House: r1c6=1
Full House: r4c6=2
Naked Single: r5c4=1
Full House: r6c4=8
Naked Single: r9c3=7
Naked Single: r9c2=1
Naked Single: r6c2=7
Naked Single: r4c2=9
Full House: r1c2=6
Naked Single: r4c3=3
Naked Single: r1c1=8
Full House: r1c3=9
Naked Single: r4c9=7
Naked Single: r5c3=6
Full House: r8c3=8
Naked Single: r8c1=3
Full House: r7c1=6
Full House: r8c7=2
Naked Single: r4c5=5
Full House: r4c8=8
Naked Single: r5c1=5
Full House: r6c1=1
Naked Single: r3c7=9
Naked Single: r6c5=3
Full House: r5c5=7
Naked Single: r9c8=4
Full House: r9c7=8
Naked Single: r3c8=1
Full House: r3c9=2
Naked Single: r5c7=3
Full House: r5c9=9
Full House: r7c9=3
Full House: r7c8=9
Naked Single: r6c8=5
Full House: r1c8=3
Full House: r1c7=5
Full House: r6c7=4
|
sudoku_normal_extremely_hard_63
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...7....423...5.7...5.8....4..6..1...8.....2...2..9..6....1.7...5.4...619....3...
|
869721534231945678745386912493652187586174329172839456624518793358497261917263845
|
. . . 7 . . . . 4
2 3 . . . 5 . 7 .
. . 5 . 8 . . . .
4 . . 6 . . 1 . .
. 8 . . . . . 2 .
. . 2 . . 9 . . 6
. . . . 1 . 7 . .
. 5 . 4 . . . 6 1
9 . . . . 3 . . .
|
8 6 9 7 2 1 5 3 4
2 3 1 9 4 5 6 7 8
7 4 5 3 8 6 9 1 2
4 9 3 6 5 2 1 8 7
5 8 6 1 7 4 3 2 9
1 7 2 8 3 9 4 5 6
6 2 4 5 1 8 7 9 3
3 5 8 4 9 7 2 6 1
9 1 7 2 6 3 8 4 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2307h3
|
869721534231945678745386912493652187586174329172839456624518793358497261917263845 #1 Medium (458)
Hidden Triple: 1,6,7 in r9c235 => r9c25<>2, r9c23<>4, r9c3<>8, r9c5<>5
Hidden Single: r7c2=2
Hidden Single: r3c2=4
Hidden Single: r7c3=4
Hidden Single: r2c5=4
Hidden Single: r5c6=4
Hidden Single: r3c1=7
Locked Candidates Type 1 (Pointing): 1 in b5 => r23c4<>1
Naked Single: r2c4=9
Naked Single: r2c9=8
Naked Single: r2c7=6
Full House: r2c3=1
Hidden Single: r8c5=9
Hidden Single: r3c6=6
Naked Single: r7c6=8
Naked Single: r7c4=5
Naked Single: r9c4=2
Naked Single: r3c4=3
Naked Single: r8c6=7
Full House: r9c5=6
Naked Single: r9c9=5
Naked Single: r1c5=2
Full House: r1c6=1
Full House: r4c6=2
Naked Single: r5c4=1
Full House: r6c4=8
Naked Single: r9c3=7
Naked Single: r9c2=1
Naked Single: r6c2=7
Naked Single: r4c2=9
Full House: r1c2=6
Naked Single: r4c3=3
Naked Single: r1c1=8
Full House: r1c3=9
Naked Single: r4c9=7
Naked Single: r5c3=6
Full House: r8c3=8
Naked Single: r8c1=3
Full House: r7c1=6
Full House: r8c7=2
Naked Single: r4c5=5
Full House: r4c8=8
Naked Single: r5c1=5
Full House: r6c1=1
Naked Single: r3c7=9
Naked Single: r6c5=3
Full House: r5c5=7
Naked Single: r9c8=4
Full House: r9c7=8
Naked Single: r3c8=1
Full House: r3c9=2
Naked Single: r5c7=3
Full House: r5c9=9
Full House: r7c9=3
Full House: r7c8=9
Naked Single: r6c8=5
Full House: r1c8=3
Full House: r1c7=5
Full House: r6c7=4
|
sudoku_normal_hard_64
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...5....3135.9468...2...59.671352849..8...1...938.1..5.5....2....79....83....79..
|
769528413135794682842136597671352849528479136493861725954683271217945368386217954
|
. . . 5 . . . . 3
1 3 5 . 9 4 6 8 .
. . 2 . . . 5 9 .
6 7 1 3 5 2 8 4 9
. . 8 . . . 1 . .
. 9 3 8 . 1 . . 5
. 5 . . . . 2 . .
. . 7 9 . . . . 8
3 . . . . 7 9 . .
|
7 6 9 5 2 8 4 1 3
1 3 5 7 9 4 6 8 2
8 4 2 1 3 6 5 9 7
6 7 1 3 5 2 8 4 9
5 2 8 4 7 9 1 3 6
4 9 3 8 6 1 7 2 5
9 5 4 6 8 3 2 7 1
2 1 7 9 4 5 3 6 8
3 8 6 2 1 7 9 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1910h1
|
769528413135794682842136597671352849528479136493861725954683271217945368386217954 #1 Medium (508)
Hidden Single: r4c7=8
Hidden Single: r9c7=9
Naked Pair: 2,7 in r2c49 => r2c258<>7, r2c58<>2
Hidden Pair: 1,2 in r1c58 => r1c5<>6, r1c58<>7, r1c58<>8, r1c5<>9
Hidden Single: r2c8=8
Naked Single: r2c2=3
Naked Single: r2c5=9
Naked Single: r2c3=5
Naked Single: r4c3=1
Naked Single: r4c2=7
Naked Single: r4c5=5
Full House: r4c9=9
Hidden Single: r3c7=5
Hidden Single: r6c3=3
Naked Single: r6c7=7
Naked Single: r1c7=4
Full House: r8c7=3
Hidden Single: r5c8=3
Hidden Single: r5c6=9
Hidden Single: r5c1=5
Hidden Single: r8c6=5
Hidden Single: r9c8=5
Hidden Single: r1c1=7
Hidden Single: r7c8=7
Hidden Single: r1c3=9
Hidden Single: r7c1=9
Hidden Single: r3c1=8
Naked Single: r1c2=6
Full House: r3c2=4
Naked Single: r1c6=8
Naked Single: r5c2=2
Full House: r6c1=4
Full House: r8c1=2
Naked Single: r5c9=6
Full House: r6c8=2
Full House: r6c5=6
Naked Single: r8c2=1
Full House: r9c2=8
Naked Single: r1c8=1
Full House: r8c8=6
Full House: r8c5=4
Full House: r1c5=2
Naked Single: r3c9=7
Full House: r2c9=2
Full House: r2c4=7
Naked Single: r5c5=7
Full House: r5c4=4
Naked Single: r9c5=1
Naked Single: r3c5=3
Full House: r7c5=8
Naked Single: r7c4=6
Naked Single: r9c9=4
Full House: r7c9=1
Naked Single: r3c6=6
Full House: r3c4=1
Full House: r7c6=3
Full House: r7c3=4
Full House: r9c4=2
Full House: r9c3=6
|
sudoku_normal_extremely_hard_64
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...5....31....46....2....9.6..3.2.4...8...1...9.8.1..5.5....2....79....83....7...
|
769528413135794682842136597671352849528479136493861725954683271217945368386217954
|
. . . 5 . . . . 3
1 . . . . 4 6 . .
. . 2 . . . . 9 .
6 . . 3 . 2 . 4 .
. . 8 . . . 1 . .
. 9 . 8 . 1 . . 5
. 5 . . . . 2 . .
. . 7 9 . . . . 8
3 . . . . 7 . . .
|
7 6 9 5 2 8 4 1 3
1 3 5 7 9 4 6 8 2
8 4 2 1 3 6 5 9 7
6 7 1 3 5 2 8 4 9
5 2 8 4 7 9 1 3 6
4 9 3 8 6 1 7 2 5
9 5 4 6 8 3 2 7 1
2 1 7 9 4 5 3 6 8
3 8 6 2 1 7 9 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1910h1
|
769528413135794682842136597671352849528479136493861725954683271217945368386217954 #1 Medium (508)
Hidden Single: r4c7=8
Hidden Single: r9c7=9
Naked Pair: 2,7 in r2c49 => r2c258<>7, r2c58<>2
Hidden Pair: 1,2 in r1c58 => r1c5<>6, r1c58<>7, r1c58<>8, r1c5<>9
Hidden Single: r2c8=8
Naked Single: r2c2=3
Naked Single: r2c5=9
Naked Single: r2c3=5
Naked Single: r4c3=1
Naked Single: r4c2=7
Naked Single: r4c5=5
Full House: r4c9=9
Hidden Single: r3c7=5
Hidden Single: r6c3=3
Naked Single: r6c7=7
Naked Single: r1c7=4
Full House: r8c7=3
Hidden Single: r5c8=3
Hidden Single: r5c6=9
Hidden Single: r5c1=5
Hidden Single: r8c6=5
Hidden Single: r9c8=5
Hidden Single: r1c1=7
Hidden Single: r7c8=7
Hidden Single: r1c3=9
Hidden Single: r7c1=9
Hidden Single: r3c1=8
Naked Single: r1c2=6
Full House: r3c2=4
Naked Single: r1c6=8
Naked Single: r5c2=2
Full House: r6c1=4
Full House: r8c1=2
Naked Single: r5c9=6
Full House: r6c8=2
Full House: r6c5=6
Naked Single: r8c2=1
Full House: r9c2=8
Naked Single: r1c8=1
Full House: r8c8=6
Full House: r8c5=4
Full House: r1c5=2
Naked Single: r3c9=7
Full House: r2c9=2
Full House: r2c4=7
Naked Single: r5c5=7
Full House: r5c4=4
Naked Single: r9c5=1
Naked Single: r3c5=3
Full House: r7c5=8
Naked Single: r7c4=6
Naked Single: r9c9=4
Full House: r7c9=1
Naked Single: r3c6=6
Full House: r3c4=1
Full House: r7c6=3
Full House: r7c3=4
Full House: r9c4=2
Full House: r9c3=6
|
sudoku_normal_hard_65
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
63459782185...4973..1...564...7...5.26..3..19.4...1.....6...1..4753..29..8..5...6
|
634597821852164973791283564318749652267835419549621387926478135475316298183952746
|
6 3 4 5 9 7 8 2 1
8 5 . . . 4 9 7 3
. . 1 . . . 5 6 4
. . . 7 . . . 5 .
2 6 . . 3 . . 1 9
. 4 . . . 1 . . .
. . 6 . . . 1 . .
4 7 5 3 . . 2 9 .
. 8 . . 5 . . . 6
|
6 3 4 5 9 7 8 2 1
8 5 2 1 6 4 9 7 3
7 9 1 2 8 3 5 6 4
3 1 8 7 4 9 6 5 2
2 6 7 8 3 5 4 1 9
5 4 9 6 2 1 3 8 7
9 2 6 4 7 8 1 3 5
4 7 5 3 1 6 2 9 8
1 8 3 9 5 2 7 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2203e
|
634597821852164973791283564318749652267835419549621387926478135475316298183952746 #1 Easy (254)
Naked Single: r1c2=3
Hidden Single: r1c9=1
Hidden Single: r5c8=1
Naked Single: r5c2=6
Hidden Single: r1c3=4
Naked Single: r1c7=8
Naked Single: r1c4=5
Full House: r1c6=7
Naked Single: r3c9=4
Naked Single: r8c7=2
Naked Single: r3c8=6
Full House: r2c7=9
Naked Single: r8c3=5
Naked Single: r2c1=8
Naked Single: r8c9=8
Naked Single: r2c3=2
Naked Single: r4c9=2
Naked Single: r8c6=6
Full House: r8c5=1
Naked Single: r3c2=9
Full House: r3c1=7
Naked Single: r6c9=7
Full House: r7c9=5
Naked Single: r2c5=6
Full House: r2c4=1
Naked Single: r4c2=1
Full House: r7c2=2
Naked Single: r5c7=4
Naked Single: r5c4=8
Naked Single: r3c4=2
Naked Single: r4c5=4
Naked Single: r4c6=9
Naked Single: r5c3=7
Full House: r5c6=5
Naked Single: r6c5=2
Full House: r6c4=6
Naked Single: r3c5=8
Full House: r3c6=3
Full House: r7c5=7
Naked Single: r4c1=3
Naked Single: r7c6=8
Full House: r9c6=2
Naked Single: r6c7=3
Naked Single: r4c3=8
Full House: r4c7=6
Full House: r6c8=8
Full House: r9c7=7
Naked Single: r7c1=9
Naked Single: r6c3=9
Full House: r6c1=5
Full House: r9c1=1
Full House: r9c3=3
Naked Single: r7c4=4
Full House: r7c8=3
Full House: r9c8=4
Full House: r9c4=9
|
sudoku_normal_extremely_hard_65
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
6...9..2..5...4.73..1...5.....7...5.2...3...9.4...1.....6...1..47.3...9..8..5...6
|
634597821852164973791283564318749652267835419549621387926478135475316298183952746
|
6 . . . 9 . . 2 .
. 5 . . . 4 . 7 3
. . 1 . . . 5 . .
. . . 7 . . . 5 .
2 . . . 3 . . . 9
. 4 . . . 1 . . .
. . 6 . . . 1 . .
4 7 . 3 . . . 9 .
. 8 . . 5 . . . 6
|
6 3 4 5 9 7 8 2 1
8 5 2 1 6 4 9 7 3
7 9 1 2 8 3 5 6 4
3 1 8 7 4 9 6 5 2
2 6 7 8 3 5 4 1 9
5 4 9 6 2 1 3 8 7
9 2 6 4 7 8 1 3 5
4 7 5 3 1 6 2 9 8
1 8 3 9 5 2 7 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2203e
|
634597821852164973791283564318749652267835419549621387926478135475316298183952746 #1 Easy (254)
Naked Single: r1c2=3
Hidden Single: r1c9=1
Hidden Single: r5c8=1
Naked Single: r5c2=6
Hidden Single: r1c3=4
Naked Single: r1c7=8
Naked Single: r1c4=5
Full House: r1c6=7
Naked Single: r3c9=4
Naked Single: r8c7=2
Naked Single: r3c8=6
Full House: r2c7=9
Naked Single: r8c3=5
Naked Single: r2c1=8
Naked Single: r8c9=8
Naked Single: r2c3=2
Naked Single: r4c9=2
Naked Single: r8c6=6
Full House: r8c5=1
Naked Single: r3c2=9
Full House: r3c1=7
Naked Single: r6c9=7
Full House: r7c9=5
Naked Single: r2c5=6
Full House: r2c4=1
Naked Single: r4c2=1
Full House: r7c2=2
Naked Single: r5c7=4
Naked Single: r5c4=8
Naked Single: r3c4=2
Naked Single: r4c5=4
Naked Single: r4c6=9
Naked Single: r5c3=7
Full House: r5c6=5
Naked Single: r6c5=2
Full House: r6c4=6
Naked Single: r3c5=8
Full House: r3c6=3
Full House: r7c5=7
Naked Single: r4c1=3
Naked Single: r7c6=8
Full House: r9c6=2
Naked Single: r6c7=3
Naked Single: r4c3=8
Full House: r4c7=6
Full House: r6c8=8
Full House: r9c7=7
Naked Single: r7c1=9
Naked Single: r6c3=9
Full House: r6c1=5
Full House: r9c1=1
Full House: r9c3=3
Naked Single: r7c4=4
Full House: r7c8=3
Full House: r9c8=4
Full House: r9c4=9
|
sudoku_normal_hard_66
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9.4.8...551.9..8..278....6974.1..9..63......4895..7.3112......84.7..2.1.38..6.5..
|
964783125513926847278514369742138956631259784895647231126375498457892613389461572
|
9 . 4 . 8 . . . 5
5 1 . 9 . . 8 . .
2 7 8 . . . . 6 9
7 4 . 1 . . 9 . .
6 3 . . . . . . 4
8 9 5 . . 7 . 3 1
1 2 . . . . . . 8
4 . 7 . . 2 . 1 .
3 8 . . 6 . 5 . .
|
9 6 4 7 8 3 1 2 5
5 1 3 9 2 6 8 4 7
2 7 8 5 1 4 3 6 9
7 4 2 1 3 8 9 5 6
6 3 1 2 5 9 7 8 4
8 9 5 6 4 7 2 3 1
1 2 6 3 7 5 4 9 8
4 5 7 8 9 2 6 1 3
3 8 9 4 6 1 5 7 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1912h2
|
964783125513926847278514369742138956631259784895647231126375498457892613389461572 #1 Medium (338)
Naked Pair: 8,9 in r69c2 => r1358c2<>9, r358c2<>8
Hidden Single: r3c3=8
Hidden Single: r3c9=9
Hidden Single: r1c1=9
Hidden Single: r6c9=1
Naked Single: r6c1=8
Naked Single: r4c1=7
Naked Single: r6c2=9
Naked Single: r2c1=5
Naked Single: r5c2=3
Naked Single: r9c2=8
Naked Single: r8c1=4
Full House: r7c1=1
Naked Single: r3c2=7
Naked Single: r4c3=2
Full House: r5c3=1
Naked Single: r9c3=9
Naked Single: r1c2=6
Full House: r2c3=3
Full House: r7c3=6
Full House: r8c2=5
Naked Single: r4c9=6
Naked Single: r6c7=2
Naked Single: r8c9=3
Naked Single: r5c7=7
Naked Single: r6c5=4
Full House: r6c4=6
Naked Single: r8c4=8
Naked Single: r8c5=9
Full House: r8c7=6
Naked Single: r7c7=4
Hidden Single: r3c5=1
Naked Single: r1c6=3
Naked Single: r3c7=3
Full House: r1c7=1
Naked Single: r7c6=5
Naked Single: r3c6=4
Full House: r3c4=5
Naked Single: r4c6=8
Naked Single: r2c6=6
Naked Single: r9c6=1
Full House: r5c6=9
Naked Single: r5c4=2
Naked Single: r4c8=5
Full House: r4c5=3
Full House: r5c5=5
Full House: r5c8=8
Naked Single: r1c4=7
Full House: r1c8=2
Full House: r2c5=2
Full House: r7c5=7
Naked Single: r7c4=3
Full House: r9c4=4
Full House: r7c8=9
Naked Single: r2c9=7
Full House: r2c8=4
Full House: r9c8=7
Full House: r9c9=2
|
sudoku_normal_extremely_hard_66
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..4.8...5.1.9..8..2......6..4.1..9..6.......4..5..7.3..2......8..7..2.1.3...6.5..
|
964783125513926847278514369742138956631259784895647231126375498457892613389461572
|
. . 4 . 8 . . . 5
. 1 . 9 . . 8 . .
2 . . . . . . 6 .
. 4 . 1 . . 9 . .
6 . . . . . . . 4
. . 5 . . 7 . 3 .
. 2 . . . . . . 8
. . 7 . . 2 . 1 .
3 . . . 6 . 5 . .
|
9 6 4 7 8 3 1 2 5
5 1 3 9 2 6 8 4 7
2 7 8 5 1 4 3 6 9
7 4 2 1 3 8 9 5 6
6 3 1 2 5 9 7 8 4
8 9 5 6 4 7 2 3 1
1 2 6 3 7 5 4 9 8
4 5 7 8 9 2 6 1 3
3 8 9 4 6 1 5 7 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1912h2
|
964783125513926847278514369742138956631259784895647231126375498457892613389461572 #1 Medium (338)
Naked Pair: 8,9 in r69c2 => r1358c2<>9, r358c2<>8
Hidden Single: r3c3=8
Hidden Single: r3c9=9
Hidden Single: r1c1=9
Hidden Single: r6c9=1
Naked Single: r6c1=8
Naked Single: r4c1=7
Naked Single: r6c2=9
Naked Single: r2c1=5
Naked Single: r5c2=3
Naked Single: r9c2=8
Naked Single: r8c1=4
Full House: r7c1=1
Naked Single: r3c2=7
Naked Single: r4c3=2
Full House: r5c3=1
Naked Single: r9c3=9
Naked Single: r1c2=6
Full House: r2c3=3
Full House: r7c3=6
Full House: r8c2=5
Naked Single: r4c9=6
Naked Single: r6c7=2
Naked Single: r8c9=3
Naked Single: r5c7=7
Naked Single: r6c5=4
Full House: r6c4=6
Naked Single: r8c4=8
Naked Single: r8c5=9
Full House: r8c7=6
Naked Single: r7c7=4
Hidden Single: r3c5=1
Naked Single: r1c6=3
Naked Single: r3c7=3
Full House: r1c7=1
Naked Single: r7c6=5
Naked Single: r3c6=4
Full House: r3c4=5
Naked Single: r4c6=8
Naked Single: r2c6=6
Naked Single: r9c6=1
Full House: r5c6=9
Naked Single: r5c4=2
Naked Single: r4c8=5
Full House: r4c5=3
Full House: r5c5=5
Full House: r5c8=8
Naked Single: r1c4=7
Full House: r1c8=2
Full House: r2c5=2
Full House: r7c5=7
Naked Single: r7c4=3
Full House: r9c4=4
Full House: r7c8=9
Naked Single: r2c9=7
Full House: r2c8=4
Full House: r9c8=7
Full House: r9c9=2
|
sudoku_normal_hard_67
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
8.6951.73.5...49264..76285.973218..5.81.4.2..6.23.518...418...23..5...1.21...63..
|
826951473157834926439762851973218645581647239642395187794183562368529714215476398
|
8 . 6 9 5 1 . 7 3
. 5 . . . 4 9 2 6
4 . . 7 6 2 8 5 .
9 7 3 2 1 8 . . 5
. 8 1 . 4 . 2 . .
6 . 2 3 . 5 1 8 .
. . 4 1 8 . . . 2
3 . . 5 . . . 1 .
2 1 . . . 6 3 . .
|
8 2 6 9 5 1 4 7 3
1 5 7 8 3 4 9 2 6
4 3 9 7 6 2 8 5 1
9 7 3 2 1 8 6 4 5
5 8 1 6 4 7 2 3 9
6 4 2 3 9 5 1 8 7
7 9 4 1 8 3 5 6 2
3 6 8 5 2 9 7 1 4
2 1 5 4 7 6 3 9 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk170929sd
|
826951473157834926439762851973218645581647239642395187794183562368529714215476398 #1 Easy (184)
Naked Single: r4c1=9
Naked Single: r1c6=1
Naked Single: r2c7=9
Naked Single: r3c4=7
Naked Single: r4c5=1
Naked Single: r5c2=8
Naked Single: r6c3=2
Naked Single: r1c1=8
Naked Single: r1c5=5
Naked Single: r2c8=2
Naked Single: r3c8=5
Naked Single: r3c9=1
Full House: r1c7=4
Full House: r1c2=2
Naked Single: r2c4=8
Full House: r2c5=3
Naked Single: r3c3=9
Full House: r3c2=3
Naked Single: r5c4=6
Full House: r9c4=4
Naked Single: r5c1=5
Full House: r6c2=4
Naked Single: r2c3=7
Full House: r2c1=1
Full House: r7c1=7
Naked Single: r4c7=6
Full House: r4c8=4
Naked Single: r9c8=9
Naked Single: r8c3=8
Full House: r9c3=5
Naked Single: r7c7=5
Full House: r8c7=7
Naked Single: r5c8=3
Full House: r7c8=6
Naked Single: r9c5=7
Full House: r9c9=8
Full House: r8c9=4
Naked Single: r8c6=9
Naked Single: r7c2=9
Full House: r7c6=3
Full House: r5c6=7
Full House: r6c5=9
Full House: r8c2=6
Full House: r8c5=2
Full House: r5c9=9
Full House: r6c9=7
|
sudoku_normal_extremely_hard_67
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..69...73.5...4..64...628...732.8..5..1.4.2..6..3.518...418...23..5...1.21...63..
|
826951473157834926439762851973218645581647239642395187794183562368529714215476398
|
. . 6 9 . . . 7 3
. 5 . . . 4 . . 6
4 . . . 6 2 8 . .
. 7 3 2 . 8 . . 5
. . 1 . 4 . 2 . .
6 . . 3 . 5 1 8 .
. . 4 1 8 . . . 2
3 . . 5 . . . 1 .
2 1 . . . 6 3 . .
|
8 2 6 9 5 1 4 7 3
1 5 7 8 3 4 9 2 6
4 3 9 7 6 2 8 5 1
9 7 3 2 1 8 6 4 5
5 8 1 6 4 7 2 3 9
6 4 2 3 9 5 1 8 7
7 9 4 1 8 3 5 6 2
3 6 8 5 2 9 7 1 4
2 1 5 4 7 6 3 9 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk170929sd
|
826951473157834926439762851973218645581647239642395187794183562368529714215476398 #1 Easy (184)
Naked Single: r4c1=9
Naked Single: r1c6=1
Naked Single: r2c7=9
Naked Single: r3c4=7
Naked Single: r4c5=1
Naked Single: r5c2=8
Naked Single: r6c3=2
Naked Single: r1c1=8
Naked Single: r1c5=5
Naked Single: r2c8=2
Naked Single: r3c8=5
Naked Single: r3c9=1
Full House: r1c7=4
Full House: r1c2=2
Naked Single: r2c4=8
Full House: r2c5=3
Naked Single: r3c3=9
Full House: r3c2=3
Naked Single: r5c4=6
Full House: r9c4=4
Naked Single: r5c1=5
Full House: r6c2=4
Naked Single: r2c3=7
Full House: r2c1=1
Full House: r7c1=7
Naked Single: r4c7=6
Full House: r4c8=4
Naked Single: r9c8=9
Naked Single: r8c3=8
Full House: r9c3=5
Naked Single: r7c7=5
Full House: r8c7=7
Naked Single: r5c8=3
Full House: r7c8=6
Naked Single: r9c5=7
Full House: r9c9=8
Full House: r8c9=4
Naked Single: r8c6=9
Naked Single: r7c2=9
Full House: r7c6=3
Full House: r5c6=7
Full House: r6c5=9
Full House: r8c2=6
Full House: r8c5=2
Full House: r5c9=9
Full House: r6c9=7
|
sudoku_normal_hard_68
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.2..9.67...45.1..97..2...5.2..8..1......32.....3.15..4.5..263171.235.846..618..9.
|
825493671634571289719268453267849135541732968983615724458926317192357846376184592
|
. 2 . . 9 . 6 7 .
. . 4 5 . 1 . . 9
7 . . 2 . . . 5 .
2 . . 8 . . 1 . .
. . . . 3 2 . . .
. . 3 . 1 5 . . 4
. 5 . . 2 6 3 1 7
1 . 2 3 5 . 8 4 6
. . 6 1 8 . . 9 .
|
8 2 5 4 9 3 6 7 1
6 3 4 5 7 1 2 8 9
7 1 9 2 6 8 4 5 3
2 6 7 8 4 9 1 3 5
5 4 1 7 3 2 9 6 8
9 8 3 6 1 5 7 2 4
4 5 8 9 2 6 3 1 7
1 9 2 3 5 7 8 4 6
3 7 6 1 8 4 5 9 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2307h2
|
825493671634571289719268453267849135541732968983615724458926317192357846376184592 #1 Medium (444)
Hidden Pair: 3,8 in r13c6 => r13c6<>4, r1c6<>7
Hidden Pair: 4,7 in r1c48 => r1c4<>5, r1c8<>1, r1c8<>3, r1c8<>8
Hidden Single: r7c8=1
Hidden Single: r6c5=1
Hidden Single: r9c4=1
Hidden Single: r5c6=2
Hidden Single: r2c4=5
Hidden Single: r8c5=5
Hidden Single: r7c5=2
Hidden Single: r8c3=2
Naked Single: r8c9=6
Naked Single: r8c8=4
Naked Single: r1c8=7
Naked Single: r7c7=3
Naked Single: r1c4=4
Naked Single: r2c7=2
Naked Single: r3c7=4
Naked Single: r3c5=6
Naked Single: r7c4=9
Naked Single: r9c7=5
Full House: r9c9=2
Naked Single: r2c5=7
Full House: r4c5=4
Naked Single: r7c3=8
Full House: r7c1=4
Naked Single: r8c6=7
Full House: r8c2=9
Full House: r9c6=4
Naked Single: r9c1=3
Full House: r9c2=7
Naked Single: r4c6=9
Naked Single: r4c2=6
Naked Single: r4c8=3
Naked Single: r6c2=8
Naked Single: r2c8=8
Naked Single: r4c9=5
Full House: r4c3=7
Naked Single: r2c2=3
Full House: r2c1=6
Naked Single: r6c1=9
Naked Single: r5c8=6
Full House: r6c8=2
Naked Single: r5c9=8
Naked Single: r3c2=1
Full House: r5c2=4
Naked Single: r5c1=5
Full House: r1c1=8
Full House: r5c3=1
Naked Single: r6c7=7
Full House: r5c7=9
Full House: r5c4=7
Full House: r6c4=6
Naked Single: r1c3=5
Full House: r3c3=9
Naked Single: r3c9=3
Full House: r1c9=1
Full House: r1c6=3
Full House: r3c6=8
|
sudoku_normal_extremely_hard_68
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.2..9.6....4..1..97..2...5.2..8..1......3......3..5..4.5...6..71..3..8....6.8..9.
|
825493671634571289719268453267849135541732968983615724458926317192357846376184592
|
. 2 . . 9 . 6 . .
. . 4 . . 1 . . 9
7 . . 2 . . . 5 .
2 . . 8 . . 1 . .
. . . . 3 . . . .
. . 3 . . 5 . . 4
. 5 . . . 6 . . 7
1 . . 3 . . 8 . .
. . 6 . 8 . . 9 .
|
8 2 5 4 9 3 6 7 1
6 3 4 5 7 1 2 8 9
7 1 9 2 6 8 4 5 3
2 6 7 8 4 9 1 3 5
5 4 1 7 3 2 9 6 8
9 8 3 6 1 5 7 2 4
4 5 8 9 2 6 3 1 7
1 9 2 3 5 7 8 4 6
3 7 6 1 8 4 5 9 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2307h2
|
825493671634571289719268453267849135541732968983615724458926317192357846376184592 #1 Medium (444)
Hidden Pair: 3,8 in r13c6 => r13c6<>4, r1c6<>7
Hidden Pair: 4,7 in r1c48 => r1c4<>5, r1c8<>1, r1c8<>3, r1c8<>8
Hidden Single: r7c8=1
Hidden Single: r6c5=1
Hidden Single: r9c4=1
Hidden Single: r5c6=2
Hidden Single: r2c4=5
Hidden Single: r8c5=5
Hidden Single: r7c5=2
Hidden Single: r8c3=2
Naked Single: r8c9=6
Naked Single: r8c8=4
Naked Single: r1c8=7
Naked Single: r7c7=3
Naked Single: r1c4=4
Naked Single: r2c7=2
Naked Single: r3c7=4
Naked Single: r3c5=6
Naked Single: r7c4=9
Naked Single: r9c7=5
Full House: r9c9=2
Naked Single: r2c5=7
Full House: r4c5=4
Naked Single: r7c3=8
Full House: r7c1=4
Naked Single: r8c6=7
Full House: r8c2=9
Full House: r9c6=4
Naked Single: r9c1=3
Full House: r9c2=7
Naked Single: r4c6=9
Naked Single: r4c2=6
Naked Single: r4c8=3
Naked Single: r6c2=8
Naked Single: r2c8=8
Naked Single: r4c9=5
Full House: r4c3=7
Naked Single: r2c2=3
Full House: r2c1=6
Naked Single: r6c1=9
Naked Single: r5c8=6
Full House: r6c8=2
Naked Single: r5c9=8
Naked Single: r3c2=1
Full House: r5c2=4
Naked Single: r5c1=5
Full House: r1c1=8
Full House: r5c3=1
Naked Single: r6c7=7
Full House: r5c7=9
Full House: r5c4=7
Full House: r6c4=6
Naked Single: r1c3=5
Full House: r3c3=9
Naked Single: r3c9=3
Full House: r1c9=1
Full House: r1c6=3
Full House: r3c6=8
|
sudoku_normal_hard_69
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.78461.3..5..2.76.316975.8.6.7.....4...5.6...1.....9...4..3..97.2..94.1..6..52843
|
278461539954823761316975482637289154492516378185347926541638297823794615769152843
|
. 7 8 4 6 1 . 3 .
. 5 . . 2 . 7 6 .
3 1 6 9 7 5 . 8 .
6 . 7 . . . . . 4
. . . 5 . 6 . . .
1 . . . . . 9 . .
. 4 . . 3 . . 9 7
. 2 . . 9 4 . 1 .
. 6 . . 5 2 8 4 3
|
2 7 8 4 6 1 5 3 9
9 5 4 8 2 3 7 6 1
3 1 6 9 7 5 4 8 2
6 3 7 2 8 9 1 5 4
4 9 2 5 1 6 3 7 8
1 8 5 3 4 7 9 2 6
5 4 1 6 3 8 2 9 7
8 2 3 7 9 4 6 1 5
7 6 9 1 5 2 8 4 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2112m
|
278461539954823761316975482637289154492516378185347926541638297823794615769152843 #1 Easy (328)
Hidden Single: r9c8=4
Hidden Single: r1c5=6
Hidden Single: r1c2=7
Hidden Single: r8c6=4
Hidden Single: r7c8=9
Hidden Single: r4c1=6
Hidden Single: r3c3=6
Hidden Single: r9c5=5
Naked Single: r9c9=3
Hidden Single: r2c7=7
Hidden Single: r3c2=1
Naked Single: r3c4=9
Naked Single: r3c6=5
Naked Single: r1c6=1
Naked Single: r3c9=2
Full House: r3c7=4
Naked Single: r7c6=8
Naked Single: r1c7=5
Naked Single: r2c6=3
Full House: r2c4=8
Naked Single: r7c1=5
Naked Single: r1c9=9
Full House: r1c1=2
Full House: r2c9=1
Naked Single: r8c7=6
Naked Single: r4c6=9
Full House: r6c6=7
Naked Single: r7c3=1
Naked Single: r8c3=3
Naked Single: r5c9=8
Naked Single: r7c7=2
Full House: r8c9=5
Full House: r7c4=6
Full House: r6c9=6
Naked Single: r8c4=7
Full House: r8c1=8
Full House: r9c4=1
Naked Single: r9c3=9
Full House: r9c1=7
Naked Single: r2c3=4
Full House: r2c1=9
Full House: r5c1=4
Naked Single: r5c3=2
Full House: r6c3=5
Naked Single: r5c5=1
Naked Single: r5c8=7
Naked Single: r6c8=2
Full House: r4c8=5
Naked Single: r4c5=8
Full House: r6c5=4
Naked Single: r5c7=3
Full House: r4c7=1
Full House: r5c2=9
Naked Single: r6c4=3
Full House: r4c4=2
Full House: r4c2=3
Full House: r6c2=8
|
sudoku_normal_extremely_hard_69
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..84...3..5..2..6.3...7..8...7.....4...5.6...1.....9...4..3...7.2..9..1..6...28..
|
278461539954823761316975482637289154492516378185347926541638297823794615769152843
|
. . 8 4 . . . 3 .
. 5 . . 2 . . 6 .
3 . . . 7 . . 8 .
. . 7 . . . . . 4
. . . 5 . 6 . . .
1 . . . . . 9 . .
. 4 . . 3 . . . 7
. 2 . . 9 . . 1 .
. 6 . . . 2 8 . .
|
2 7 8 4 6 1 5 3 9
9 5 4 8 2 3 7 6 1
3 1 6 9 7 5 4 8 2
6 3 7 2 8 9 1 5 4
4 9 2 5 1 6 3 7 8
1 8 5 3 4 7 9 2 6
5 4 1 6 3 8 2 9 7
8 2 3 7 9 4 6 1 5
7 6 9 1 5 2 8 4 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2112m
|
278461539954823761316975482637289154492516378185347926541638297823794615769152843 #1 Easy (328)
Hidden Single: r9c8=4
Hidden Single: r1c5=6
Hidden Single: r1c2=7
Hidden Single: r8c6=4
Hidden Single: r7c8=9
Hidden Single: r4c1=6
Hidden Single: r3c3=6
Hidden Single: r9c5=5
Naked Single: r9c9=3
Hidden Single: r2c7=7
Hidden Single: r3c2=1
Naked Single: r3c4=9
Naked Single: r3c6=5
Naked Single: r1c6=1
Naked Single: r3c9=2
Full House: r3c7=4
Naked Single: r7c6=8
Naked Single: r1c7=5
Naked Single: r2c6=3
Full House: r2c4=8
Naked Single: r7c1=5
Naked Single: r1c9=9
Full House: r1c1=2
Full House: r2c9=1
Naked Single: r8c7=6
Naked Single: r4c6=9
Full House: r6c6=7
Naked Single: r7c3=1
Naked Single: r8c3=3
Naked Single: r5c9=8
Naked Single: r7c7=2
Full House: r8c9=5
Full House: r7c4=6
Full House: r6c9=6
Naked Single: r8c4=7
Full House: r8c1=8
Full House: r9c4=1
Naked Single: r9c3=9
Full House: r9c1=7
Naked Single: r2c3=4
Full House: r2c1=9
Full House: r5c1=4
Naked Single: r5c3=2
Full House: r6c3=5
Naked Single: r5c5=1
Naked Single: r5c8=7
Naked Single: r6c8=2
Full House: r4c8=5
Naked Single: r4c5=8
Full House: r6c5=4
Naked Single: r5c7=3
Full House: r4c7=1
Full House: r5c2=9
Naked Single: r6c4=3
Full House: r4c4=2
Full House: r4c2=3
Full House: r6c2=8
|
sudoku_normal_hard_70
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..3.9.46.95.86.2136....28.7..26..13.1...8.7.6.96...5..4..1..6.2.7...698..69.5.3.1
|
823791465957864213614532897782645139145983726396217548438179652571326984269458371
|
. . 3 . 9 . 4 6 .
9 5 . 8 6 . 2 1 3
6 . . . . 2 8 . 7
. . 2 6 . . 1 3 .
1 . . . 8 . 7 . 6
. 9 6 . . . 5 . .
4 . . 1 . . 6 . 2
. 7 . . . 6 9 8 .
. 6 9 . 5 . 3 . 1
|
8 2 3 7 9 1 4 6 5
9 5 7 8 6 4 2 1 3
6 1 4 5 3 2 8 9 7
7 8 2 6 4 5 1 3 9
1 4 5 9 8 3 7 2 6
3 9 6 2 1 7 5 4 8
4 3 8 1 7 9 6 5 2
5 7 1 3 2 6 9 8 4
2 6 9 4 5 8 3 7 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2309m
|
823791465957864213614532897782645139145983726396217548438179652571326984269458371 #1 Easy (314)
Hidden Single: r2c1=9
Naked Single: r2c9=3
Hidden Single: r2c7=2
Hidden Single: r2c5=6
Hidden Single: r7c7=6
Hidden Single: r1c8=6
Hidden Single: r6c3=6
Hidden Single: r9c2=6
Hidden Single: r4c4=6
Hidden Single: r9c9=1
Naked Single: r8c7=9
Naked Single: r3c7=8
Naked Single: r5c7=7
Full House: r4c7=1
Naked Single: r1c9=5
Full House: r3c8=9
Naked Single: r1c4=7
Naked Single: r8c9=4
Naked Single: r1c6=1
Naked Single: r2c6=4
Full House: r2c3=7
Naked Single: r6c9=8
Full House: r4c9=9
Naked Single: r9c8=7
Full House: r7c8=5
Naked Single: r3c5=3
Full House: r3c4=5
Naked Single: r9c6=8
Naked Single: r7c3=8
Naked Single: r7c5=7
Naked Single: r8c5=2
Naked Single: r9c1=2
Full House: r9c4=4
Naked Single: r7c2=3
Full House: r7c6=9
Full House: r8c4=3
Naked Single: r4c5=4
Full House: r6c5=1
Naked Single: r1c1=8
Full House: r1c2=2
Naked Single: r5c2=4
Naked Single: r8c1=5
Full House: r8c3=1
Naked Single: r6c4=2
Full House: r5c4=9
Naked Single: r4c2=8
Full House: r3c2=1
Full House: r3c3=4
Full House: r5c3=5
Naked Single: r5c8=2
Full House: r6c8=4
Full House: r5c6=3
Naked Single: r4c1=7
Full House: r4c6=5
Full House: r6c6=7
Full House: r6c1=3
|
sudoku_normal_extremely_hard_70
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..3.9.4...5.8...1.6....2..7..2....3.1...8...6.9....5..4..1....2.7...6.8...9.5.3..
|
823791465957864213614532897782645139145983726396217548438179652571326984269458371
|
. . 3 . 9 . 4 . .
. 5 . 8 . . . 1 .
6 . . . . 2 . . 7
. . 2 . . . . 3 .
1 . . . 8 . . . 6
. 9 . . . . 5 . .
4 . . 1 . . . . 2
. 7 . . . 6 . 8 .
. . 9 . 5 . 3 . .
|
8 2 3 7 9 1 4 6 5
9 5 7 8 6 4 2 1 3
6 1 4 5 3 2 8 9 7
7 8 2 6 4 5 1 3 9
1 4 5 9 8 3 7 2 6
3 9 6 2 1 7 5 4 8
4 3 8 1 7 9 6 5 2
5 7 1 3 2 6 9 8 4
2 6 9 4 5 8 3 7 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2309m
|
823791465957864213614532897782645139145983726396217548438179652571326984269458371 #1 Easy (314)
Hidden Single: r2c1=9
Naked Single: r2c9=3
Hidden Single: r2c7=2
Hidden Single: r2c5=6
Hidden Single: r7c7=6
Hidden Single: r1c8=6
Hidden Single: r6c3=6
Hidden Single: r9c2=6
Hidden Single: r4c4=6
Hidden Single: r9c9=1
Naked Single: r8c7=9
Naked Single: r3c7=8
Naked Single: r5c7=7
Full House: r4c7=1
Naked Single: r1c9=5
Full House: r3c8=9
Naked Single: r1c4=7
Naked Single: r8c9=4
Naked Single: r1c6=1
Naked Single: r2c6=4
Full House: r2c3=7
Naked Single: r6c9=8
Full House: r4c9=9
Naked Single: r9c8=7
Full House: r7c8=5
Naked Single: r3c5=3
Full House: r3c4=5
Naked Single: r9c6=8
Naked Single: r7c3=8
Naked Single: r7c5=7
Naked Single: r8c5=2
Naked Single: r9c1=2
Full House: r9c4=4
Naked Single: r7c2=3
Full House: r7c6=9
Full House: r8c4=3
Naked Single: r4c5=4
Full House: r6c5=1
Naked Single: r1c1=8
Full House: r1c2=2
Naked Single: r5c2=4
Naked Single: r8c1=5
Full House: r8c3=1
Naked Single: r6c4=2
Full House: r5c4=9
Naked Single: r4c2=8
Full House: r3c2=1
Full House: r3c3=4
Full House: r5c3=5
Naked Single: r5c8=2
Full House: r6c8=4
Full House: r5c6=3
Naked Single: r4c1=7
Full House: r4c6=5
Full House: r6c6=7
Full House: r6c1=3
|
sudoku_normal_hard_71
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...3.8.9.1.9.....2..5.194..8....7.3.9.2.3.7.8.1.98...4..1.5.8..4..8.1..7.986.3...
|
247368195139745682685219473854127936962534718713986524371452869426891357598673241
|
. . . 3 . 8 . 9 .
1 . 9 . . . . . 2
. . 5 . 1 9 4 . .
8 . . . . 7 . 3 .
9 . 2 . 3 . 7 . 8
. 1 . 9 8 . . . 4
. . 1 . 5 . 8 . .
4 . . 8 . 1 . . 7
. 9 8 6 . 3 . . .
|
2 4 7 3 6 8 1 9 5
1 3 9 7 4 5 6 8 2
6 8 5 2 1 9 4 7 3
8 5 4 1 2 7 9 3 6
9 6 2 5 3 4 7 1 8
7 1 3 9 8 6 5 2 4
3 7 1 4 5 2 8 6 9
4 2 6 8 9 1 3 5 7
5 9 8 6 7 3 2 4 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2102h1
|
247368195139745682685219473854127936962534718713986524371452869426891357598673241 #1 Medium (718)
Locked Candidates Type 1 (Pointing): 5 in b2 => r2c78<>5
Locked Candidates Type 1 (Pointing): 1 in b8 => r8c78<>1
Hidden Pair: 1,5 in r1c79 => r1c79<>6
Naked Pair: 1,5 in r19c9 => r45c9<>1, r45c9<>5
Hidden Pair: 3,9 in r7c9,r8c7 => r7c9,r8c7<>6, r8c7<>2, r8c7<>5
Locked Candidates Type 1 (Pointing): 6 in b9 => r2356c8<>6
Locked Pair: 7,8 in r23c8 => r3c9,r56c8<>8
Hidden Single: r6c5=8
Hidden Single: r5c9=8
Hidden Single: r8c4=8
Hidden Single: r9c3=8
Hidden Single: r5c5=3
Hidden Single: r5c1=9
Hidden Single: r8c6=1
Hidden Single: r3c6=9
Hidden Single: r2c3=9
Hidden Single: r8c5=9
Naked Single: r8c7=3
Naked Single: r2c7=6
Naked Single: r7c9=9
Naked Single: r8c3=6
Naked Single: r3c9=3
Naked Single: r4c9=6
Naked Single: r4c3=4
Naked Single: r1c3=7
Full House: r6c3=3
Naked Single: r4c2=5
Naked Single: r4c5=2
Naked Single: r5c2=6
Full House: r6c1=7
Naked Single: r8c2=2
Full House: r8c8=5
Naked Single: r4c4=1
Full House: r4c7=9
Naked Single: r1c2=4
Naked Single: r3c2=8
Naked Single: r7c1=3
Naked Single: r9c1=5
Full House: r7c2=7
Full House: r2c2=3
Naked Single: r5c8=1
Naked Single: r6c8=2
Full House: r6c7=5
Full House: r6c6=6
Naked Single: r9c9=1
Full House: r1c9=5
Naked Single: r1c5=6
Naked Single: r3c8=7
Naked Single: r9c8=4
Naked Single: r1c7=1
Full House: r9c7=2
Full House: r1c1=2
Full House: r2c8=8
Full House: r7c8=6
Full House: r9c5=7
Full House: r3c1=6
Full House: r3c4=2
Full House: r2c5=4
Naked Single: r7c4=4
Full House: r7c6=2
Naked Single: r2c6=5
Full House: r2c4=7
Full House: r5c4=5
Full House: r5c6=4
|
sudoku_normal_extremely_hard_71
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...3.8.9.1.......2..5.1.4..8....7.3...2...7...1.9....4..1.5.8..4.......7.9.6.3...
|
247368195139745682685219473854127936962534718713986524371452869426891357598673241
|
. . . 3 . 8 . 9 .
1 . . . . . . . 2
. . 5 . 1 . 4 . .
8 . . . . 7 . 3 .
. . 2 . . . 7 . .
. 1 . 9 . . . . 4
. . 1 . 5 . 8 . .
4 . . . . . . . 7
. 9 . 6 . 3 . . .
|
2 4 7 3 6 8 1 9 5
1 3 9 7 4 5 6 8 2
6 8 5 2 1 9 4 7 3
8 5 4 1 2 7 9 3 6
9 6 2 5 3 4 7 1 8
7 1 3 9 8 6 5 2 4
3 7 1 4 5 2 8 6 9
4 2 6 8 9 1 3 5 7
5 9 8 6 7 3 2 4 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2102h1
|
247368195139745682685219473854127936962534718713986524371452869426891357598673241 #1 Medium (718)
Locked Candidates Type 1 (Pointing): 5 in b2 => r2c78<>5
Locked Candidates Type 1 (Pointing): 1 in b8 => r8c78<>1
Hidden Pair: 1,5 in r1c79 => r1c79<>6
Naked Pair: 1,5 in r19c9 => r45c9<>1, r45c9<>5
Hidden Pair: 3,9 in r7c9,r8c7 => r7c9,r8c7<>6, r8c7<>2, r8c7<>5
Locked Candidates Type 1 (Pointing): 6 in b9 => r2356c8<>6
Locked Pair: 7,8 in r23c8 => r3c9,r56c8<>8
Hidden Single: r6c5=8
Hidden Single: r5c9=8
Hidden Single: r8c4=8
Hidden Single: r9c3=8
Hidden Single: r5c5=3
Hidden Single: r5c1=9
Hidden Single: r8c6=1
Hidden Single: r3c6=9
Hidden Single: r2c3=9
Hidden Single: r8c5=9
Naked Single: r8c7=3
Naked Single: r2c7=6
Naked Single: r7c9=9
Naked Single: r8c3=6
Naked Single: r3c9=3
Naked Single: r4c9=6
Naked Single: r4c3=4
Naked Single: r1c3=7
Full House: r6c3=3
Naked Single: r4c2=5
Naked Single: r4c5=2
Naked Single: r5c2=6
Full House: r6c1=7
Naked Single: r8c2=2
Full House: r8c8=5
Naked Single: r4c4=1
Full House: r4c7=9
Naked Single: r1c2=4
Naked Single: r3c2=8
Naked Single: r7c1=3
Naked Single: r9c1=5
Full House: r7c2=7
Full House: r2c2=3
Naked Single: r5c8=1
Naked Single: r6c8=2
Full House: r6c7=5
Full House: r6c6=6
Naked Single: r9c9=1
Full House: r1c9=5
Naked Single: r1c5=6
Naked Single: r3c8=7
Naked Single: r9c8=4
Naked Single: r1c7=1
Full House: r9c7=2
Full House: r1c1=2
Full House: r2c8=8
Full House: r7c8=6
Full House: r9c5=7
Full House: r3c1=6
Full House: r3c4=2
Full House: r2c5=4
Naked Single: r7c4=4
Full House: r7c6=2
Naked Single: r2c6=5
Full House: r2c4=7
Full House: r5c4=5
Full House: r5c6=4
|
sudoku_normal_hard_72
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
3.1.9...59548..1..8.2....3.7..9452..14..2.57.2.5..1..442....35.5.8..4..76...5.84.
|
361492785954873162872516439736945218149628573285731694427189356518364927693257841
|
3 . 1 . 9 . . . 5
9 5 4 8 . . 1 . .
8 . 2 . . . . 3 .
7 . . 9 4 5 2 . .
1 4 . . 2 . 5 7 .
2 . 5 . . 1 . . 4
4 2 . . . . 3 5 .
5 . 8 . . 4 . . 7
6 . . . 5 . 8 4 .
|
3 6 1 4 9 2 7 8 5
9 5 4 8 7 3 1 6 2
8 7 2 5 1 6 4 3 9
7 3 6 9 4 5 2 1 8
1 4 9 6 2 8 5 7 3
2 8 5 7 3 1 6 9 4
4 2 7 1 8 9 3 5 6
5 1 8 3 6 4 9 2 7
6 9 3 2 5 7 8 4 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1908h
|
361492785954873162872516439736945218149628573285731694427189356518364927693257841 #1 Medium (494)
Hidden Single: r6c1=2
Hidden Single: r4c5=4
Locked Candidates Type 1 (Pointing): 4 in b9 => r12c8<>4
Hidden Single: r2c3=4
Hidden Single: r7c1=4
Hidden Single: r9c8=4
Hidden Single: r7c8=5
Hidden Single: r4c6=5
Hidden Single: r5c7=5
Hidden Single: r2c2=5
Naked Single: r3c1=8
Naked Single: r1c1=3
Naked Single: r5c1=1
Full House: r8c1=5
Hidden Single: r3c4=5
Hidden Single: r1c8=8
Hidden Single: r3c5=1
Hidden Single: r3c7=4
Hidden Single: r1c4=4
Hidden Single: r1c7=7
Naked Single: r1c2=6
Full House: r1c6=2
Full House: r3c2=7
Naked Single: r3c6=6
Full House: r3c9=9
Hidden Single: r5c3=9
Naked Single: r7c3=7
Naked Single: r9c3=3
Full House: r4c3=6
Naked Single: r4c8=1
Hidden Single: r7c6=9
Naked Single: r9c6=7
Naked Single: r2c6=3
Full House: r2c5=7
Full House: r5c6=8
Hidden Single: r9c2=9
Full House: r8c2=1
Hidden Single: r7c5=8
Hidden Single: r6c4=7
Hidden Single: r4c9=8
Full House: r4c2=3
Full House: r6c2=8
Hidden Single: r5c9=3
Full House: r5c4=6
Full House: r6c5=3
Full House: r8c5=6
Naked Single: r7c4=1
Full House: r7c9=6
Naked Single: r8c7=9
Full House: r6c7=6
Full House: r6c8=9
Naked Single: r9c4=2
Full House: r8c4=3
Full House: r8c8=2
Full House: r9c9=1
Full House: r2c9=2
Full House: r2c8=6
|
sudoku_normal_extremely_hard_72
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..1.9...59..8..1....2....3.7..9..2...4..2..7...5..1..4.2....3....8..4..76...5.8..
|
361492785954873162872516439736945218149628573285731694427189356518364927693257841
|
. . 1 . 9 . . . 5
9 . . 8 . . 1 . .
. . 2 . . . . 3 .
7 . . 9 . . 2 . .
. 4 . . 2 . . 7 .
. . 5 . . 1 . . 4
. 2 . . . . 3 . .
. . 8 . . 4 . . 7
6 . . . 5 . 8 . .
|
3 6 1 4 9 2 7 8 5
9 5 4 8 7 3 1 6 2
8 7 2 5 1 6 4 3 9
7 3 6 9 4 5 2 1 8
1 4 9 6 2 8 5 7 3
2 8 5 7 3 1 6 9 4
4 2 7 1 8 9 3 5 6
5 1 8 3 6 4 9 2 7
6 9 3 2 5 7 8 4 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1908h
|
361492785954873162872516439736945218149628573285731694427189356518364927693257841 #1 Medium (494)
Hidden Single: r6c1=2
Hidden Single: r4c5=4
Locked Candidates Type 1 (Pointing): 4 in b9 => r12c8<>4
Hidden Single: r2c3=4
Hidden Single: r7c1=4
Hidden Single: r9c8=4
Hidden Single: r7c8=5
Hidden Single: r4c6=5
Hidden Single: r5c7=5
Hidden Single: r2c2=5
Naked Single: r3c1=8
Naked Single: r1c1=3
Naked Single: r5c1=1
Full House: r8c1=5
Hidden Single: r3c4=5
Hidden Single: r1c8=8
Hidden Single: r3c5=1
Hidden Single: r3c7=4
Hidden Single: r1c4=4
Hidden Single: r1c7=7
Naked Single: r1c2=6
Full House: r1c6=2
Full House: r3c2=7
Naked Single: r3c6=6
Full House: r3c9=9
Hidden Single: r5c3=9
Naked Single: r7c3=7
Naked Single: r9c3=3
Full House: r4c3=6
Naked Single: r4c8=1
Hidden Single: r7c6=9
Naked Single: r9c6=7
Naked Single: r2c6=3
Full House: r2c5=7
Full House: r5c6=8
Hidden Single: r9c2=9
Full House: r8c2=1
Hidden Single: r7c5=8
Hidden Single: r6c4=7
Hidden Single: r4c9=8
Full House: r4c2=3
Full House: r6c2=8
Hidden Single: r5c9=3
Full House: r5c4=6
Full House: r6c5=3
Full House: r8c5=6
Naked Single: r7c4=1
Full House: r7c9=6
Naked Single: r8c7=9
Full House: r6c7=6
Full House: r6c8=9
Naked Single: r9c4=2
Full House: r8c4=3
Full House: r8c8=2
Full House: r9c9=1
Full House: r2c9=2
Full House: r2c8=6
|
sudoku_normal_hard_73
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
6...8.2....54.26.....1...5.39...84..8...4.9.3...3..87..4...9...9.26135..5.3.741.9
|
631985247785432691429167358396758412857241963214396875148529736972613584563874129
|
6 . . . 8 . 2 . .
. . 5 4 . 2 6 . .
. . . 1 . . . 5 .
3 9 . . . 8 4 . .
8 . . . 4 . 9 . 3
. . . 3 . . 8 7 .
. 4 . . . 9 . . .
9 . 2 6 1 3 5 . .
5 . 3 . 7 4 1 . 9
|
6 3 1 9 8 5 2 4 7
7 8 5 4 3 2 6 9 1
4 2 9 1 6 7 3 5 8
3 9 6 7 5 8 4 1 2
8 5 7 2 4 1 9 6 3
2 1 4 3 9 6 8 7 5
1 4 8 5 2 9 7 3 6
9 7 2 6 1 3 5 8 4
5 6 3 8 7 4 1 2 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2201h2
|
631985247785432691429167358396758412857241963214396875148529736972613584563874129 #1 Medium (754)
Naked Single: r8c5=1
Hidden Single: r9c6=4
Hidden Single: r4c1=3
Hidden Single: r8c1=9
Naked Triple: 1,5,7 in r279c1 => r3c1<>7, r6c1<>1, r6c1<>5
Locked Candidates Type 1 (Pointing): 5 in b4 => r9c2<>5
Hidden Pair: 3,7 in r37c7 => r3c7<>4, r37c7<>8, r3c7<>9, r7c7<>1
Locked Candidates Type 1 (Pointing): 9 in b3 => r5c8<>9
Locked Candidates Type 2 (Claiming): 4 in c7 => r4c89,r6c9<>4
Hidden Triple: 2,5,6 in r467c9 => r467c9<>1, r67c9<>8, r7c9<>7
Hidden Single: r6c7=8
Naked Single: r9c7=1
Naked Single: r4c7=4
Naked Single: r5c7=9
Naked Single: r9c1=5
Hidden Single: r6c5=9
Naked Single: r2c5=3
Naked Single: r3c5=6
Naked Single: r3c6=7
Naked Single: r1c6=5
Full House: r1c4=9
Naked Single: r3c7=3
Full House: r7c7=7
Naked Single: r7c1=1
Naked Single: r2c1=7
Hidden Single: r2c8=9
Hidden Single: r3c3=9
Hidden Single: r1c2=3
Hidden Single: r7c8=3
Hidden Single: r8c2=7
Hidden Single: r1c9=7
Hidden Single: r7c3=8
Full House: r9c2=6
Hidden Single: r2c9=1
Full House: r2c2=8
Naked Single: r1c8=4
Full House: r1c3=1
Full House: r3c9=8
Naked Single: r3c2=2
Full House: r3c1=4
Full House: r6c1=2
Naked Single: r8c8=8
Full House: r8c9=4
Naked Single: r9c8=2
Full House: r7c9=6
Full House: r9c4=8
Naked Single: r6c9=5
Full House: r4c9=2
Naked Single: r6c2=1
Full House: r5c2=5
Naked Single: r4c5=5
Full House: r7c5=2
Full House: r7c4=5
Naked Single: r6c6=6
Full House: r5c6=1
Full House: r6c3=4
Naked Single: r4c4=7
Full House: r5c4=2
Naked Single: r5c8=6
Full House: r4c8=1
Full House: r4c3=6
Full House: r5c3=7
|
sudoku_normal_extremely_hard_73
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
6...8.2....54.26.....1...5..9...8...8...4...3...3...7..4...9.....26.35....3.7...9
|
631985247785432691429167358396758412857241963214396875148529736972613584563874129
|
6 . . . 8 . 2 . .
. . 5 4 . 2 6 . .
. . . 1 . . . 5 .
. 9 . . . 8 . . .
8 . . . 4 . . . 3
. . . 3 . . . 7 .
. 4 . . . 9 . . .
. . 2 6 . 3 5 . .
. . 3 . 7 . . . 9
|
6 3 1 9 8 5 2 4 7
7 8 5 4 3 2 6 9 1
4 2 9 1 6 7 3 5 8
3 9 6 7 5 8 4 1 2
8 5 7 2 4 1 9 6 3
2 1 4 3 9 6 8 7 5
1 4 8 5 2 9 7 3 6
9 7 2 6 1 3 5 8 4
5 6 3 8 7 4 1 2 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2201h2
|
631985247785432691429167358396758412857241963214396875148529736972613584563874129 #1 Medium (754)
Naked Single: r8c5=1
Hidden Single: r9c6=4
Hidden Single: r4c1=3
Hidden Single: r8c1=9
Naked Triple: 1,5,7 in r279c1 => r3c1<>7, r6c1<>1, r6c1<>5
Locked Candidates Type 1 (Pointing): 5 in b4 => r9c2<>5
Hidden Pair: 3,7 in r37c7 => r3c7<>4, r37c7<>8, r3c7<>9, r7c7<>1
Locked Candidates Type 1 (Pointing): 9 in b3 => r5c8<>9
Locked Candidates Type 2 (Claiming): 4 in c7 => r4c89,r6c9<>4
Hidden Triple: 2,5,6 in r467c9 => r467c9<>1, r67c9<>8, r7c9<>7
Hidden Single: r6c7=8
Naked Single: r9c7=1
Naked Single: r4c7=4
Naked Single: r5c7=9
Naked Single: r9c1=5
Hidden Single: r6c5=9
Naked Single: r2c5=3
Naked Single: r3c5=6
Naked Single: r3c6=7
Naked Single: r1c6=5
Full House: r1c4=9
Naked Single: r3c7=3
Full House: r7c7=7
Naked Single: r7c1=1
Naked Single: r2c1=7
Hidden Single: r2c8=9
Hidden Single: r3c3=9
Hidden Single: r1c2=3
Hidden Single: r7c8=3
Hidden Single: r8c2=7
Hidden Single: r1c9=7
Hidden Single: r7c3=8
Full House: r9c2=6
Hidden Single: r2c9=1
Full House: r2c2=8
Naked Single: r1c8=4
Full House: r1c3=1
Full House: r3c9=8
Naked Single: r3c2=2
Full House: r3c1=4
Full House: r6c1=2
Naked Single: r8c8=8
Full House: r8c9=4
Naked Single: r9c8=2
Full House: r7c9=6
Full House: r9c4=8
Naked Single: r6c9=5
Full House: r4c9=2
Naked Single: r6c2=1
Full House: r5c2=5
Naked Single: r4c5=5
Full House: r7c5=2
Full House: r7c4=5
Naked Single: r6c6=6
Full House: r5c6=1
Full House: r6c3=4
Naked Single: r4c4=7
Full House: r5c4=2
Naked Single: r5c8=6
Full House: r4c8=1
Full House: r4c3=6
Full House: r5c3=7
|
sudoku_normal_hard_74
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9..8...36.6...19.4..5.697...86.....9.97.1.8..4...98.6...8.3.19.6..98....3291.46.8
|
914827536762351984835469712186542379297613845453798261548236197671985423329174658
|
9 . . 8 . . . 3 6
. 6 . . . 1 9 . 4
. . 5 . 6 9 7 . .
. 8 6 . . . . . 9
. 9 7 . 1 . 8 . .
4 . . . 9 8 . 6 .
. . 8 . 3 . 1 9 .
6 . . 9 8 . . . .
3 2 9 1 . 4 6 . 8
|
9 1 4 8 2 7 5 3 6
7 6 2 3 5 1 9 8 4
8 3 5 4 6 9 7 1 2
1 8 6 5 4 2 3 7 9
2 9 7 6 1 3 8 4 5
4 5 3 7 9 8 2 6 1
5 4 8 2 3 6 1 9 7
6 7 1 9 8 5 4 2 3
3 2 9 1 7 4 6 5 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2108m
|
914827536762351984835469712186542379297613845453798261548236197671985423329174658 #1 Easy (412)
Hidden Single: r9c4=1
Hidden Single: r9c7=6
Hidden Single: r1c9=6
Hidden Single: r2c7=9
Hidden Single: r6c5=9
Hidden Single: r3c6=9
Hidden Single: r5c2=9
Hidden Single: r9c3=9
Hidden Single: r6c6=8
Hidden Single: r8c5=8
Hidden Single: r7c8=9
Hidden Single: r2c2=6
Hidden Single: r4c3=6
Hidden Single: r9c1=3
Hidden Single: r7c2=4
Naked Single: r8c3=1
Hidden Single: r3c4=4
Hidden Single: r1c3=4
Hidden Single: r1c2=1
Naked Single: r3c2=3
Naked Single: r2c3=2
Full House: r6c3=3
Naked Single: r6c2=5
Full House: r8c2=7
Full House: r7c1=5
Naked Single: r3c1=8
Full House: r2c1=7
Naked Single: r5c1=2
Full House: r4c1=1
Naked Single: r6c7=2
Naked Single: r2c5=5
Naked Single: r1c7=5
Naked Single: r6c4=7
Full House: r6c9=1
Naked Single: r2c4=3
Full House: r2c8=8
Naked Single: r9c5=7
Full House: r9c8=5
Naked Single: r3c9=2
Full House: r3c8=1
Naked Single: r1c5=2
Full House: r1c6=7
Full House: r4c5=4
Naked Single: r5c8=4
Naked Single: r7c9=7
Naked Single: r8c9=3
Full House: r5c9=5
Naked Single: r4c7=3
Full House: r4c8=7
Full House: r8c8=2
Full House: r8c7=4
Full House: r8c6=5
Naked Single: r5c4=6
Full House: r5c6=3
Naked Single: r4c6=2
Full House: r4c4=5
Full House: r7c4=2
Full House: r7c6=6
|
sudoku_normal_extremely_hard_74
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9..8...3......1..4..5.6.7...8......9..7.1.8..4......6...8.3.1..6..9......2...4..8
|
914827536762351984835469712186542379297613845453798261548236197671985423329174658
|
9 . . 8 . . . 3 .
. . . . . 1 . . 4
. . 5 . 6 . 7 . .
. 8 . . . . . . 9
. . 7 . 1 . 8 . .
4 . . . . . . 6 .
. . 8 . 3 . 1 . .
6 . . 9 . . . . .
. 2 . . . 4 . . 8
|
9 1 4 8 2 7 5 3 6
7 6 2 3 5 1 9 8 4
8 3 5 4 6 9 7 1 2
1 8 6 5 4 2 3 7 9
2 9 7 6 1 3 8 4 5
4 5 3 7 9 8 2 6 1
5 4 8 2 3 6 1 9 7
6 7 1 9 8 5 4 2 3
3 2 9 1 7 4 6 5 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2108m
|
914827536762351984835469712186542379297613845453798261548236197671985423329174658 #1 Easy (412)
Hidden Single: r9c4=1
Hidden Single: r9c7=6
Hidden Single: r1c9=6
Hidden Single: r2c7=9
Hidden Single: r6c5=9
Hidden Single: r3c6=9
Hidden Single: r5c2=9
Hidden Single: r9c3=9
Hidden Single: r6c6=8
Hidden Single: r8c5=8
Hidden Single: r7c8=9
Hidden Single: r2c2=6
Hidden Single: r4c3=6
Hidden Single: r9c1=3
Hidden Single: r7c2=4
Naked Single: r8c3=1
Hidden Single: r3c4=4
Hidden Single: r1c3=4
Hidden Single: r1c2=1
Naked Single: r3c2=3
Naked Single: r2c3=2
Full House: r6c3=3
Naked Single: r6c2=5
Full House: r8c2=7
Full House: r7c1=5
Naked Single: r3c1=8
Full House: r2c1=7
Naked Single: r5c1=2
Full House: r4c1=1
Naked Single: r6c7=2
Naked Single: r2c5=5
Naked Single: r1c7=5
Naked Single: r6c4=7
Full House: r6c9=1
Naked Single: r2c4=3
Full House: r2c8=8
Naked Single: r9c5=7
Full House: r9c8=5
Naked Single: r3c9=2
Full House: r3c8=1
Naked Single: r1c5=2
Full House: r1c6=7
Full House: r4c5=4
Naked Single: r5c8=4
Naked Single: r7c9=7
Naked Single: r8c9=3
Full House: r5c9=5
Naked Single: r4c7=3
Full House: r4c8=7
Full House: r8c8=2
Full House: r8c7=4
Full House: r8c6=5
Naked Single: r5c4=6
Full House: r5c6=3
Naked Single: r4c6=2
Full House: r4c4=5
Full House: r7c4=2
Full House: r7c6=6
|
sudoku_normal_hard_75
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.5...2..84.218.9..8.7...132.2...8..1..3.4.82.5..6...7..1....58.2.5893.166..7...9.
|
156932748432187965897456132924378651763541829581629374319264587275893416648715293
|
. 5 . . . 2 . . 8
4 . 2 1 8 . 9 . .
8 . 7 . . . 1 3 2
. 2 . . . 8 . . 1
. . 3 . 4 . 8 2 .
5 . . 6 . . . 7 .
. 1 . . . . 5 8 .
2 . 5 8 9 3 . 1 6
6 . . 7 . . . 9 .
|
1 5 6 9 3 2 7 4 8
4 3 2 1 8 7 9 6 5
8 9 7 4 5 6 1 3 2
9 2 4 3 7 8 6 5 1
7 6 3 5 4 1 8 2 9
5 8 1 6 2 9 3 7 4
3 1 9 2 6 4 5 8 7
2 7 5 8 9 3 4 1 6
6 4 8 7 1 5 2 9 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2305h3
|
156932748432187965897456132924378651763541829581629374319264587275893416648715293 #1 Medium (624)
Hidden Pair: 3,7 in r7c19 => r7c19<>2, r7c1<>8, r7c1<>9, r7c9<>4
Hidden Pair: 2,8 in r38c1 => r3c1<>1, r38c1<>9, r8c1<>7
Hidden Single: r3c7=1
Hidden Single: r8c8=1
Hidden Single: r7c8=8
Hidden Pair: 1,5 in r9c56 => r9c5<>2, r9c5<>8, r9c6<>4
Locked Candidates Type 1 (Pointing): 8 in b8 => r8c12<>8
Naked Single: r8c1=2
Naked Single: r3c1=8
Hidden Single: r3c9=2
Hidden Single: r2c3=2
Hidden Single: r2c5=8
Naked Single: r8c5=9
Hidden Single: r8c4=8
Hidden Single: r5c8=2
Hidden Single: r9c7=2
Hidden Single: r2c2=3
Hidden Single: r7c3=9
Hidden Single: r7c4=2
Naked Single: r7c5=6
Naked Single: r3c5=5
Naked Single: r7c6=4
Naked Single: r9c5=1
Full House: r9c6=5
Hidden Single: r6c5=2
Hidden Single: r5c2=6
Naked Single: r3c2=9
Naked Single: r4c3=4
Naked Single: r1c1=1
Full House: r1c3=6
Naked Single: r3c4=4
Full House: r3c6=6
Naked Single: r6c2=8
Naked Single: r9c3=8
Full House: r6c3=1
Naked Single: r1c8=4
Naked Single: r2c6=7
Naked Single: r9c2=4
Full House: r8c2=7
Full House: r9c9=3
Full House: r7c1=3
Full House: r8c7=4
Full House: r7c9=7
Naked Single: r6c6=9
Full House: r5c6=1
Naked Single: r1c7=7
Naked Single: r1c5=3
Full House: r1c4=9
Full House: r4c5=7
Naked Single: r2c9=5
Full House: r2c8=6
Full House: r4c8=5
Naked Single: r6c7=3
Full House: r6c9=4
Full House: r5c9=9
Full House: r4c7=6
Naked Single: r5c4=5
Full House: r4c4=3
Full House: r4c1=9
Full House: r5c1=7
|
sudoku_normal_extremely_hard_75
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.5...2..84..1..9....7....3..2...8..1..3.4.8..5..6...7..1....5....5..3..66..7...9.
|
156932748432187965897456132924378651763541829581629374319264587275893416648715293
|
. 5 . . . 2 . . 8
4 . . 1 . . 9 . .
. . 7 . . . . 3 .
. 2 . . . 8 . . 1
. . 3 . 4 . 8 . .
5 . . 6 . . . 7 .
. 1 . . . . 5 . .
. . 5 . . 3 . . 6
6 . . 7 . . . 9 .
|
1 5 6 9 3 2 7 4 8
4 3 2 1 8 7 9 6 5
8 9 7 4 5 6 1 3 2
9 2 4 3 7 8 6 5 1
7 6 3 5 4 1 8 2 9
5 8 1 6 2 9 3 7 4
3 1 9 2 6 4 5 8 7
2 7 5 8 9 3 4 1 6
6 4 8 7 1 5 2 9 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2305h3
|
156932748432187965897456132924378651763541829581629374319264587275893416648715293 #1 Medium (624)
Hidden Pair: 3,7 in r7c19 => r7c19<>2, r7c1<>8, r7c1<>9, r7c9<>4
Hidden Pair: 2,8 in r38c1 => r3c1<>1, r38c1<>9, r8c1<>7
Hidden Single: r3c7=1
Hidden Single: r8c8=1
Hidden Single: r7c8=8
Hidden Pair: 1,5 in r9c56 => r9c5<>2, r9c5<>8, r9c6<>4
Locked Candidates Type 1 (Pointing): 8 in b8 => r8c12<>8
Naked Single: r8c1=2
Naked Single: r3c1=8
Hidden Single: r3c9=2
Hidden Single: r2c3=2
Hidden Single: r2c5=8
Naked Single: r8c5=9
Hidden Single: r8c4=8
Hidden Single: r5c8=2
Hidden Single: r9c7=2
Hidden Single: r2c2=3
Hidden Single: r7c3=9
Hidden Single: r7c4=2
Naked Single: r7c5=6
Naked Single: r3c5=5
Naked Single: r7c6=4
Naked Single: r9c5=1
Full House: r9c6=5
Hidden Single: r6c5=2
Hidden Single: r5c2=6
Naked Single: r3c2=9
Naked Single: r4c3=4
Naked Single: r1c1=1
Full House: r1c3=6
Naked Single: r3c4=4
Full House: r3c6=6
Naked Single: r6c2=8
Naked Single: r9c3=8
Full House: r6c3=1
Naked Single: r1c8=4
Naked Single: r2c6=7
Naked Single: r9c2=4
Full House: r8c2=7
Full House: r9c9=3
Full House: r7c1=3
Full House: r8c7=4
Full House: r7c9=7
Naked Single: r6c6=9
Full House: r5c6=1
Naked Single: r1c7=7
Naked Single: r1c5=3
Full House: r1c4=9
Full House: r4c5=7
Naked Single: r2c9=5
Full House: r2c8=6
Full House: r4c8=5
Naked Single: r6c7=3
Full House: r6c9=4
Full House: r5c9=9
Full House: r4c7=6
Naked Single: r5c4=5
Full House: r4c4=3
Full House: r4c1=9
Full House: r5c1=7
|
sudoku_normal_hard_76
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
7193.28.....1.67..346.8..1.1324795689.7...4.15..6.1.9..9..6.1.4..1..4......51.6.9
|
719342856258196743346785912132479568967853421584621397895267134671934285423518679
|
7 1 9 3 . 2 8 . .
. . . 1 . 6 7 . .
3 4 6 . 8 . . 1 .
1 3 2 4 7 9 5 6 8
9 . 7 . . . 4 . 1
5 . . 6 . 1 . 9 .
. 9 . . 6 . 1 . 4
. . 1 . . 4 . . .
. . . 5 1 . 6 . 9
|
7 1 9 3 4 2 8 5 6
2 5 8 1 9 6 7 4 3
3 4 6 7 8 5 9 1 2
1 3 2 4 7 9 5 6 8
9 6 7 8 5 3 4 2 1
5 8 4 6 2 1 3 9 7
8 9 5 2 6 7 1 3 4
6 7 1 9 3 4 2 8 5
4 2 3 5 1 8 6 7 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2204e
|
719342856258196743346785912132479568967853421584621397895267134671934285423518679 #1 Easy (332)
Naked Single: r4c3=2
Naked Single: r1c4=3
Naked Single: r4c7=5
Naked Single: r1c7=8
Naked Single: r4c5=7
Naked Single: r4c8=6
Full House: r4c1=1
Hidden Single: r1c2=1
Hidden Single: r5c1=9
Hidden Single: r2c6=6
Hidden Single: r5c9=1
Hidden Single: r9c5=1
Hidden Single: r3c2=4
Naked Single: r6c2=8
Naked Single: r5c2=6
Full House: r6c3=4
Hidden Single: r2c5=9
Naked Single: r3c4=7
Naked Single: r3c6=5
Full House: r1c5=4
Naked Single: r3c9=2
Full House: r3c7=9
Naked Single: r1c8=5
Full House: r1c9=6
Naked Single: r2c9=3
Full House: r2c8=4
Naked Single: r6c9=7
Full House: r8c9=5
Hidden Single: r8c1=6
Hidden Single: r9c1=4
Hidden Single: r8c4=9
Hidden Single: r5c5=5
Hidden Single: r7c3=5
Naked Single: r2c3=8
Full House: r9c3=3
Naked Single: r2c1=2
Full House: r2c2=5
Full House: r7c1=8
Naked Single: r7c4=2
Full House: r5c4=8
Naked Single: r8c5=3
Full House: r6c5=2
Full House: r5c6=3
Full House: r6c7=3
Full House: r8c7=2
Full House: r5c8=2
Naked Single: r7c6=7
Full House: r7c8=3
Full House: r9c6=8
Naked Single: r8c2=7
Full House: r8c8=8
Full House: r9c8=7
Full House: r9c2=2
|
sudoku_normal_extremely_hard_76
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
7.9..2......1..7..3.6.8..1..3.4.9..8..7...4..5..6.1.9..9..6.1.4..1..4......5..6.9
|
719342856258196743346785912132479568967853421584621397895267134671934285423518679
|
7 . 9 . . 2 . . .
. . . 1 . . 7 . .
3 . 6 . 8 . . 1 .
. 3 . 4 . 9 . . 8
. . 7 . . . 4 . .
5 . . 6 . 1 . 9 .
. 9 . . 6 . 1 . 4
. . 1 . . 4 . . .
. . . 5 . . 6 . 9
|
7 1 9 3 4 2 8 5 6
2 5 8 1 9 6 7 4 3
3 4 6 7 8 5 9 1 2
1 3 2 4 7 9 5 6 8
9 6 7 8 5 3 4 2 1
5 8 4 6 2 1 3 9 7
8 9 5 2 6 7 1 3 4
6 7 1 9 3 4 2 8 5
4 2 3 5 1 8 6 7 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2204e
|
719342856258196743346785912132479568967853421584621397895267134671934285423518679 #1 Easy (332)
Naked Single: r4c3=2
Naked Single: r1c4=3
Naked Single: r4c7=5
Naked Single: r1c7=8
Naked Single: r4c5=7
Naked Single: r4c8=6
Full House: r4c1=1
Hidden Single: r1c2=1
Hidden Single: r5c1=9
Hidden Single: r2c6=6
Hidden Single: r5c9=1
Hidden Single: r9c5=1
Hidden Single: r3c2=4
Naked Single: r6c2=8
Naked Single: r5c2=6
Full House: r6c3=4
Hidden Single: r2c5=9
Naked Single: r3c4=7
Naked Single: r3c6=5
Full House: r1c5=4
Naked Single: r3c9=2
Full House: r3c7=9
Naked Single: r1c8=5
Full House: r1c9=6
Naked Single: r2c9=3
Full House: r2c8=4
Naked Single: r6c9=7
Full House: r8c9=5
Hidden Single: r8c1=6
Hidden Single: r9c1=4
Hidden Single: r8c4=9
Hidden Single: r5c5=5
Hidden Single: r7c3=5
Naked Single: r2c3=8
Full House: r9c3=3
Naked Single: r2c1=2
Full House: r2c2=5
Full House: r7c1=8
Naked Single: r7c4=2
Full House: r5c4=8
Naked Single: r8c5=3
Full House: r6c5=2
Full House: r5c6=3
Full House: r6c7=3
Full House: r8c7=2
Full House: r5c8=2
Naked Single: r7c6=7
Full House: r7c8=3
Full House: r9c6=8
Naked Single: r8c2=7
Full House: r8c8=8
Full House: r9c8=7
Full House: r9c2=2
|
sudoku_normal_hard_77
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..3.94.5.2456...98.97.5.6..7.4...269...9.2...912...5.3.21.79.8.4.9..1..2.7.42.9..
|
863294157245617398197358624784135269536942871912786543321579486459861732678423915
|
. . 3 . 9 4 . 5 .
2 4 5 6 . . . 9 8
. 9 7 . 5 . 6 . .
7 . 4 . . . 2 6 9
. . . 9 . 2 . . .
9 1 2 . . . 5 . 3
. 2 1 . 7 9 . 8 .
4 . 9 . . 1 . . 2
. 7 . 4 2 . 9 . .
|
8 6 3 2 9 4 1 5 7
2 4 5 6 1 7 3 9 8
1 9 7 3 5 8 6 2 4
7 8 4 1 3 5 2 6 9
5 3 6 9 4 2 8 7 1
9 1 2 7 8 6 5 4 3
3 2 1 5 7 9 4 8 6
4 5 9 8 6 1 7 3 2
6 7 8 4 2 3 9 1 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2206m
|
863294157245617398197358624784135269536942871912786543321579486459861732678423915 #1 Easy (410)
Hidden Single: r2c2=4
Hidden Single: r4c9=9
Hidden Single: r2c3=5
Hidden Single: r1c5=9
Hidden Single: r2c8=9
Hidden Single: r3c3=7
Hidden Single: r7c6=9
Hidden Single: r8c3=9
Hidden Single: r9c5=2
Hidden Single: r6c1=9
Hidden Single: r7c2=2
Hidden Single: r6c3=2
Hidden Single: r4c7=2
Hidden Single: r3c8=2
Hidden Single: r1c4=2
Hidden Single: r5c7=8
Naked Single: r5c3=6
Full House: r9c3=8
Hidden Single: r2c7=3
Naked Single: r2c5=1
Full House: r2c6=7
Naked Single: r7c7=4
Naked Single: r8c7=7
Full House: r1c7=1
Naked Single: r8c8=3
Naked Single: r1c9=7
Full House: r3c9=4
Naked Single: r9c8=1
Naked Single: r5c9=1
Hidden Single: r6c4=7
Naked Single: r6c8=4
Full House: r5c8=7
Hidden Single: r4c2=8
Naked Single: r1c2=6
Full House: r1c1=8
Full House: r3c1=1
Naked Single: r4c5=3
Naked Single: r8c2=5
Full House: r5c2=3
Full House: r5c1=5
Full House: r5c5=4
Naked Single: r4c6=5
Full House: r4c4=1
Naked Single: r8c4=8
Full House: r8c5=6
Full House: r6c5=8
Full House: r6c6=6
Naked Single: r3c4=3
Full House: r3c6=8
Full House: r9c6=3
Full House: r7c4=5
Naked Single: r9c1=6
Full House: r7c1=3
Full House: r7c9=6
Full House: r9c9=5
|
sudoku_normal_extremely_hard_77
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..3..4.5.2..6....8.9..5.6..7.4....6....9.2....1....5.3..1.7..8.4....1..2.7.4..9..
|
863294157245617398197358624784135269536942871912786543321579486459861732678423915
|
. . 3 . . 4 . 5 .
2 . . 6 . . . . 8
. 9 . . 5 . 6 . .
7 . 4 . . . . 6 .
. . . 9 . 2 . . .
. 1 . . . . 5 . 3
. . 1 . 7 . . 8 .
4 . . . . 1 . . 2
. 7 . 4 . . 9 . .
|
8 6 3 2 9 4 1 5 7
2 4 5 6 1 7 3 9 8
1 9 7 3 5 8 6 2 4
7 8 4 1 3 5 2 6 9
5 3 6 9 4 2 8 7 1
9 1 2 7 8 6 5 4 3
3 2 1 5 7 9 4 8 6
4 5 9 8 6 1 7 3 2
6 7 8 4 2 3 9 1 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2206m
|
863294157245617398197358624784135269536942871912786543321579486459861732678423915 #1 Easy (410)
Hidden Single: r2c2=4
Hidden Single: r4c9=9
Hidden Single: r2c3=5
Hidden Single: r1c5=9
Hidden Single: r2c8=9
Hidden Single: r3c3=7
Hidden Single: r7c6=9
Hidden Single: r8c3=9
Hidden Single: r9c5=2
Hidden Single: r6c1=9
Hidden Single: r7c2=2
Hidden Single: r6c3=2
Hidden Single: r4c7=2
Hidden Single: r3c8=2
Hidden Single: r1c4=2
Hidden Single: r5c7=8
Naked Single: r5c3=6
Full House: r9c3=8
Hidden Single: r2c7=3
Naked Single: r2c5=1
Full House: r2c6=7
Naked Single: r7c7=4
Naked Single: r8c7=7
Full House: r1c7=1
Naked Single: r8c8=3
Naked Single: r1c9=7
Full House: r3c9=4
Naked Single: r9c8=1
Naked Single: r5c9=1
Hidden Single: r6c4=7
Naked Single: r6c8=4
Full House: r5c8=7
Hidden Single: r4c2=8
Naked Single: r1c2=6
Full House: r1c1=8
Full House: r3c1=1
Naked Single: r4c5=3
Naked Single: r8c2=5
Full House: r5c2=3
Full House: r5c1=5
Full House: r5c5=4
Naked Single: r4c6=5
Full House: r4c4=1
Naked Single: r8c4=8
Full House: r8c5=6
Full House: r6c5=8
Full House: r6c6=6
Naked Single: r3c4=3
Full House: r3c6=8
Full House: r9c6=3
Full House: r7c4=5
Naked Single: r9c1=6
Full House: r7c1=3
Full House: r7c9=6
Full House: r9c9=5
|
sudoku_normal_hard_78
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.7.4..183..3.872.55..3.1.67.9.2....1..4...8.9.....9.52.6.9....4..2.147.64....6.18
|
679452183143687295528391467896275341254163879317849652761938524982514736435726918
|
. 7 . 4 . . 1 8 3
. . 3 . 8 7 2 . 5
5 . . 3 . 1 . 6 7
. 9 . 2 . . . . 1
. . 4 . . . 8 . 9
. . . . . 9 . 5 2
. 6 . 9 . . . . 4
. . 2 . 1 4 7 . 6
4 . . . . 6 . 1 8
|
6 7 9 4 5 2 1 8 3
1 4 3 6 8 7 2 9 5
5 2 8 3 9 1 4 6 7
8 9 6 2 7 5 3 4 1
2 5 4 1 6 3 8 7 9
3 1 7 8 4 9 6 5 2
7 6 1 9 3 8 5 2 4
9 8 2 5 1 4 7 3 6
4 3 5 7 2 6 9 1 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1903h
|
679452183143687295528391467896275341254163879317849652761938524982514736435726918 #1 Hard (558)
Hidden Single: r8c6=4
Hidden Single: r8c9=6
Hidden Pair: 1,5 in r1c7,r2c9 => r1c7,r2c9<>9, r2c9<>7
X-Wing: 9 r28 c18 => r1c18,r5c8<>9
Naked Single: r1c8=8
Hidden Single: r5c9=9
Naked Single: r3c9=7
Naked Single: r3c4=3
Naked Single: r4c9=1
Naked Single: r2c9=5
Naked Single: r6c9=2
Full House: r9c9=8
Naked Single: r1c7=1
Naked Single: r2c6=7
Naked Single: r2c4=6
Hidden Single: r7c8=2
Hidden Single: r9c5=2
Naked Single: r3c5=9
Naked Single: r1c5=5
Full House: r1c6=2
Naked Single: r3c3=8
Naked Single: r3c7=4
Full House: r2c8=9
Full House: r3c2=2
Naked Single: r1c1=6
Full House: r1c3=9
Naked Single: r2c1=1
Full House: r2c2=4
Naked Single: r8c8=3
Naked Single: r5c8=7
Full House: r4c8=4
Naked Single: r7c7=5
Full House: r9c7=9
Hidden Single: r5c1=2
Hidden Single: r6c5=4
Hidden Single: r8c1=9
Hidden Single: r5c5=6
Hidden Single: r7c3=1
Hidden Single: r9c2=3
Hidden Single: r5c6=3
Naked Single: r4c5=7
Full House: r7c5=3
Naked Single: r7c6=8
Full House: r4c6=5
Full House: r7c1=7
Naked Single: r8c4=5
Full House: r8c2=8
Full House: r9c3=5
Full House: r9c4=7
Naked Single: r4c3=6
Full House: r6c3=7
Naked Single: r5c4=1
Full House: r5c2=5
Full House: r6c2=1
Full House: r6c4=8
Naked Single: r4c7=3
Full House: r4c1=8
Full House: r6c1=3
Full House: r6c7=6
|
sudoku_normal_extremely_hard_78
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.7.4....3..3.8.2..5....1.6..9.2.......4...8.......9.5..6.9....4..2.1.7..4....6.1.
|
679452183143687295528391467896275341254163879317849652761938524982514736435726918
|
. 7 . 4 . . . . 3
. . 3 . 8 . 2 . .
5 . . . . 1 . 6 .
. 9 . 2 . . . . .
. . 4 . . . 8 . .
. . . . . 9 . 5 .
. 6 . 9 . . . . 4
. . 2 . 1 . 7 . .
4 . . . . 6 . 1 .
|
6 7 9 4 5 2 1 8 3
1 4 3 6 8 7 2 9 5
5 2 8 3 9 1 4 6 7
8 9 6 2 7 5 3 4 1
2 5 4 1 6 3 8 7 9
3 1 7 8 4 9 6 5 2
7 6 1 9 3 8 5 2 4
9 8 2 5 1 4 7 3 6
4 3 5 7 2 6 9 1 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1903h
|
679452183143687295528391467896275341254163879317849652761938524982514736435726918 #1 Hard (558)
Hidden Single: r8c6=4
Hidden Single: r8c9=6
Hidden Pair: 1,5 in r1c7,r2c9 => r1c7,r2c9<>9, r2c9<>7
X-Wing: 9 r28 c18 => r1c18,r5c8<>9
Naked Single: r1c8=8
Hidden Single: r5c9=9
Naked Single: r3c9=7
Naked Single: r3c4=3
Naked Single: r4c9=1
Naked Single: r2c9=5
Naked Single: r6c9=2
Full House: r9c9=8
Naked Single: r1c7=1
Naked Single: r2c6=7
Naked Single: r2c4=6
Hidden Single: r7c8=2
Hidden Single: r9c5=2
Naked Single: r3c5=9
Naked Single: r1c5=5
Full House: r1c6=2
Naked Single: r3c3=8
Naked Single: r3c7=4
Full House: r2c8=9
Full House: r3c2=2
Naked Single: r1c1=6
Full House: r1c3=9
Naked Single: r2c1=1
Full House: r2c2=4
Naked Single: r8c8=3
Naked Single: r5c8=7
Full House: r4c8=4
Naked Single: r7c7=5
Full House: r9c7=9
Hidden Single: r5c1=2
Hidden Single: r6c5=4
Hidden Single: r8c1=9
Hidden Single: r5c5=6
Hidden Single: r7c3=1
Hidden Single: r9c2=3
Hidden Single: r5c6=3
Naked Single: r4c5=7
Full House: r7c5=3
Naked Single: r7c6=8
Full House: r4c6=5
Full House: r7c1=7
Naked Single: r8c4=5
Full House: r8c2=8
Full House: r9c3=5
Full House: r9c4=7
Naked Single: r4c3=6
Full House: r6c3=7
Naked Single: r5c4=1
Full House: r5c2=5
Full House: r6c2=1
Full House: r6c4=8
Naked Single: r4c7=3
Full House: r4c1=8
Full House: r6c1=3
Full House: r6c7=6
|
sudoku_normal_hard_79
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
421...836..93..1253...12497..3....1...8.237...52...3...9.63....2....96.313.2..948
|
421795836879364125365812497743986512918523764652471389594638271287149653136257948
|
4 2 1 . . . 8 3 6
. . 9 3 . . 1 2 5
3 . . . 1 2 4 9 7
. . 3 . . . . 1 .
. . 8 . 2 3 7 . .
. 5 2 . . . 3 . .
. 9 . 6 3 . . . .
2 . . . . 9 6 . 3
1 3 . 2 . . 9 4 8
|
4 2 1 7 9 5 8 3 6
8 7 9 3 6 4 1 2 5
3 6 5 8 1 2 4 9 7
7 4 3 9 8 6 5 1 2
9 1 8 5 2 3 7 6 4
6 5 2 4 7 1 3 8 9
5 9 4 6 3 8 2 7 1
2 8 7 1 4 9 6 5 3
1 3 6 2 5 7 9 4 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2302m
|
421795836879364125365812497743986512918523764652471389594638271287149653136257948 #1 Easy (334)
Hidden Single: r1c8=3
Hidden Single: r5c6=3
Hidden Single: r6c3=2
Hidden Single: r9c4=2
Hidden Single: r3c1=3
Hidden Single: r9c2=3
Hidden Single: r9c7=9
Hidden Single: r8c9=3
Hidden Single: r1c3=1
Naked Single: r1c7=8
Naked Single: r3c7=4
Naked Single: r3c9=7
Naked Single: r2c8=2
Full House: r2c7=1
Hidden Single: r5c2=1
Hidden Single: r7c1=5
Naked Single: r7c7=2
Full House: r4c7=5
Naked Single: r7c8=7
Naked Single: r7c9=1
Full House: r8c8=5
Naked Single: r5c8=6
Full House: r6c8=8
Naked Single: r7c3=4
Full House: r7c6=8
Naked Single: r5c1=9
Naked Single: r8c3=7
Naked Single: r5c9=4
Full House: r5c4=5
Naked Single: r8c2=8
Full House: r9c3=6
Full House: r3c3=5
Naked Single: r8c5=4
Full House: r8c4=1
Naked Single: r6c9=9
Full House: r4c9=2
Naked Single: r3c4=8
Full House: r3c2=6
Naked Single: r2c2=7
Full House: r2c1=8
Full House: r4c2=4
Naked Single: r2c5=6
Full House: r2c6=4
Naked Single: r6c5=7
Naked Single: r4c4=9
Naked Single: r4c6=6
Naked Single: r6c1=6
Full House: r4c1=7
Full House: r4c5=8
Naked Single: r6c4=4
Full House: r1c4=7
Full House: r6c6=1
Naked Single: r9c5=5
Full House: r1c5=9
Full House: r1c6=5
Full House: r9c6=7
|
sudoku_normal_extremely_hard_79
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
42......6..93....5....12.9...3....1...8.2.7...5....3...9.63....2....96..1......48
|
421795836879364125365812497743986512918523764652471389594638271287149653136257948
|
4 2 . . . . . . 6
. . 9 3 . . . . 5
. . . . 1 2 . 9 .
. . 3 . . . . 1 .
. . 8 . 2 . 7 . .
. 5 . . . . 3 . .
. 9 . 6 3 . . . .
2 . . . . 9 6 . .
1 . . . . . . 4 8
|
4 2 1 7 9 5 8 3 6
8 7 9 3 6 4 1 2 5
3 6 5 8 1 2 4 9 7
7 4 3 9 8 6 5 1 2
9 1 8 5 2 3 7 6 4
6 5 2 4 7 1 3 8 9
5 9 4 6 3 8 2 7 1
2 8 7 1 4 9 6 5 3
1 3 6 2 5 7 9 4 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2302m
|
421795836879364125365812497743986512918523764652471389594638271287149653136257948 #1 Easy (334)
Hidden Single: r1c8=3
Hidden Single: r5c6=3
Hidden Single: r6c3=2
Hidden Single: r9c4=2
Hidden Single: r3c1=3
Hidden Single: r9c2=3
Hidden Single: r9c7=9
Hidden Single: r8c9=3
Hidden Single: r1c3=1
Naked Single: r1c7=8
Naked Single: r3c7=4
Naked Single: r3c9=7
Naked Single: r2c8=2
Full House: r2c7=1
Hidden Single: r5c2=1
Hidden Single: r7c1=5
Naked Single: r7c7=2
Full House: r4c7=5
Naked Single: r7c8=7
Naked Single: r7c9=1
Full House: r8c8=5
Naked Single: r5c8=6
Full House: r6c8=8
Naked Single: r7c3=4
Full House: r7c6=8
Naked Single: r5c1=9
Naked Single: r8c3=7
Naked Single: r5c9=4
Full House: r5c4=5
Naked Single: r8c2=8
Full House: r9c3=6
Full House: r3c3=5
Naked Single: r8c5=4
Full House: r8c4=1
Naked Single: r6c9=9
Full House: r4c9=2
Naked Single: r3c4=8
Full House: r3c2=6
Naked Single: r2c2=7
Full House: r2c1=8
Full House: r4c2=4
Naked Single: r2c5=6
Full House: r2c6=4
Naked Single: r6c5=7
Naked Single: r4c4=9
Naked Single: r4c6=6
Naked Single: r6c1=6
Full House: r4c1=7
Full House: r4c5=8
Naked Single: r6c4=4
Full House: r1c4=7
Full House: r6c6=1
Naked Single: r9c5=5
Full House: r1c5=9
Full House: r1c6=5
Full House: r9c6=7
|
sudoku_normal_hard_80
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.1..6..72..5..28.12..1.....5.96..3.8.8..7319...39.57.4...7.46.9..78..2...9..36.1.
|
914368572765492831238157946579641328486273195123985764351724689647819253892536417
|
. 1 . . 6 . . 7 2
. . 5 . . 2 8 . 1
2 . . 1 . . . . .
5 . 9 6 . . 3 . 8
. 8 . . 7 3 1 9 .
. . 3 9 . 5 7 . 4
. . . 7 . 4 6 . 9
. . 7 8 . . 2 . .
. 9 . . 3 6 . 1 .
|
9 1 4 3 6 8 5 7 2
7 6 5 4 9 2 8 3 1
2 3 8 1 5 7 9 4 6
5 7 9 6 4 1 3 2 8
4 8 6 2 7 3 1 9 5
1 2 3 9 8 5 7 6 4
3 5 1 7 2 4 6 8 9
6 4 7 8 1 9 2 5 3
8 9 2 5 3 6 4 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2302h3
|
914368572765492831238157946579641328486273195123985764351724689647819253892536417 #1 Hard (664)
Hidden Single: r1c9=2
Hidden Single: r2c9=1
Naked Triple: 3,5,6 in r358c9 => r9c9<>5, r9c9<>6
X-Wing: 2 r59 c34 => r47c3,r67c4<>2
Naked Single: r6c4=9
Hidden Single: r4c3=9
Locked Candidates Type 2 (Claiming): 1 in r4 => r5c6,r6c5<>1
Naked Single: r5c6=3
X-Wing: 5 r19 c47 => r357c7,r7c4<>5
Naked Single: r7c4=7
Naked Single: r7c7=6
Naked Single: r9c6=6
Naked Single: r5c7=1
Naked Single: r6c7=7
Naked Single: r4c9=8
Naked Single: r4c6=1
Naked Single: r4c8=2
Naked Single: r9c9=7
Naked Single: r8c6=9
Naked Single: r4c5=4
Full House: r4c2=7
Naked Single: r6c8=6
Full House: r5c9=5
Naked Single: r1c6=8
Full House: r3c6=7
Naked Single: r2c5=9
Naked Single: r5c4=2
Full House: r6c5=8
Naked Single: r6c1=1
Full House: r6c2=2
Naked Single: r8c9=3
Full House: r3c9=6
Naked Single: r1c3=4
Naked Single: r3c5=5
Naked Single: r9c4=5
Naked Single: r3c2=3
Naked Single: r3c3=8
Naked Single: r5c3=6
Full House: r5c1=4
Naked Single: r1c4=3
Full House: r2c4=4
Naked Single: r8c5=1
Full House: r7c5=2
Naked Single: r9c7=4
Naked Single: r1c1=9
Full House: r1c7=5
Full House: r3c7=9
Full House: r3c8=4
Full House: r2c8=3
Naked Single: r2c2=6
Full House: r2c1=7
Naked Single: r7c2=5
Full House: r8c2=4
Naked Single: r7c3=1
Full House: r9c3=2
Full House: r9c1=8
Naked Single: r8c1=6
Full House: r8c8=5
Full House: r7c8=8
Full House: r7c1=3
|
sudoku_normal_extremely_hard_80
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.1..6..7...5..28..2..1.....5..6..3...8..7..9...3..5..4.....4..9..78..2...9..3..1.
|
914368572765492831238157946579641328486273195123985764351724689647819253892536417
|
. 1 . . 6 . . 7 .
. . 5 . . 2 8 . .
2 . . 1 . . . . .
5 . . 6 . . 3 . .
. 8 . . 7 . . 9 .
. . 3 . . 5 . . 4
. . . . . 4 . . 9
. . 7 8 . . 2 . .
. 9 . . 3 . . 1 .
|
9 1 4 3 6 8 5 7 2
7 6 5 4 9 2 8 3 1
2 3 8 1 5 7 9 4 6
5 7 9 6 4 1 3 2 8
4 8 6 2 7 3 1 9 5
1 2 3 9 8 5 7 6 4
3 5 1 7 2 4 6 8 9
6 4 7 8 1 9 2 5 3
8 9 2 5 3 6 4 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2302h3
|
914368572765492831238157946579641328486273195123985764351724689647819253892536417 #1 Hard (664)
Hidden Single: r1c9=2
Hidden Single: r2c9=1
Naked Triple: 3,5,6 in r358c9 => r9c9<>5, r9c9<>6
X-Wing: 2 r59 c34 => r47c3,r67c4<>2
Naked Single: r6c4=9
Hidden Single: r4c3=9
Locked Candidates Type 2 (Claiming): 1 in r4 => r5c6,r6c5<>1
Naked Single: r5c6=3
X-Wing: 5 r19 c47 => r357c7,r7c4<>5
Naked Single: r7c4=7
Naked Single: r7c7=6
Naked Single: r9c6=6
Naked Single: r5c7=1
Naked Single: r6c7=7
Naked Single: r4c9=8
Naked Single: r4c6=1
Naked Single: r4c8=2
Naked Single: r9c9=7
Naked Single: r8c6=9
Naked Single: r4c5=4
Full House: r4c2=7
Naked Single: r6c8=6
Full House: r5c9=5
Naked Single: r1c6=8
Full House: r3c6=7
Naked Single: r2c5=9
Naked Single: r5c4=2
Full House: r6c5=8
Naked Single: r6c1=1
Full House: r6c2=2
Naked Single: r8c9=3
Full House: r3c9=6
Naked Single: r1c3=4
Naked Single: r3c5=5
Naked Single: r9c4=5
Naked Single: r3c2=3
Naked Single: r3c3=8
Naked Single: r5c3=6
Full House: r5c1=4
Naked Single: r1c4=3
Full House: r2c4=4
Naked Single: r8c5=1
Full House: r7c5=2
Naked Single: r9c7=4
Naked Single: r1c1=9
Full House: r1c7=5
Full House: r3c7=9
Full House: r3c8=4
Full House: r2c8=3
Naked Single: r2c2=6
Full House: r2c1=7
Naked Single: r7c2=5
Full House: r8c2=4
Naked Single: r7c3=1
Full House: r9c3=2
Full House: r9c1=8
Naked Single: r8c1=6
Full House: r8c8=5
Full House: r7c8=8
Full House: r7c1=3
|
sudoku_normal_hard_81
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
45..7...191.8..3...6...4....8..4.613576391..2134....5....4...266.1.89.373...6..8.
|
458973261912856374763214598289745613576391842134628759895437126621589437347162985
|
4 5 . . 7 . . . 1
9 1 . 8 . . 3 . .
. 6 . . . 4 . . .
. 8 . . 4 . 6 1 3
5 7 6 3 9 1 . . 2
1 3 4 . . . . 5 .
. . . 4 . . . 2 6
6 . 1 . 8 9 . 3 7
3 . . . 6 . . 8 .
|
4 5 8 9 7 3 2 6 1
9 1 2 8 5 6 3 7 4
7 6 3 2 1 4 5 9 8
2 8 9 7 4 5 6 1 3
5 7 6 3 9 1 8 4 2
1 3 4 6 2 8 7 5 9
8 9 5 4 3 7 1 2 6
6 2 1 5 8 9 4 3 7
3 4 7 1 6 2 9 8 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2210m
|
458973261912856374763214598289745613576391842134628759895437126621589437347162985 #1 Easy (348)
Hidden Single: r6c2=3
Hidden Single: r5c3=6
Hidden Single: r4c8=1
Hidden Single: r2c2=1
Hidden Single: r6c1=1
Hidden Single: r4c9=3
Hidden Single: r8c8=3
Hidden Single: r1c1=4
Hidden Single: r4c5=4
Hidden Single: r8c1=6
Hidden Single: r7c9=6
Hidden Single: r8c5=8
Naked Single: r5c5=9
Naked Single: r5c2=7
Naked Single: r6c5=2
Naked Single: r4c1=2
Full House: r4c3=9
Naked Single: r5c8=4
Full House: r5c7=8
Naked Single: r7c2=9
Naked Single: r2c5=5
Naked Single: r6c9=9
Full House: r6c7=7
Naked Single: r2c9=4
Naked Single: r6c4=6
Full House: r6c6=8
Naked Single: r9c9=5
Full House: r3c9=8
Naked Single: r7c7=1
Naked Single: r8c7=4
Full House: r9c7=9
Naked Single: r3c1=7
Full House: r7c1=8
Naked Single: r7c5=3
Full House: r3c5=1
Naked Single: r8c2=2
Full House: r8c4=5
Full House: r9c2=4
Naked Single: r1c7=2
Full House: r3c7=5
Naked Single: r2c3=2
Naked Single: r3c8=9
Naked Single: r9c3=7
Full House: r7c3=5
Full House: r7c6=7
Naked Single: r4c4=7
Full House: r4c6=5
Naked Single: r1c4=9
Naked Single: r2c6=6
Full House: r2c8=7
Full House: r1c8=6
Naked Single: r3c3=3
Full House: r3c4=2
Full House: r1c6=3
Full House: r9c6=2
Full House: r1c3=8
Full House: r9c4=1
|
sudoku_normal_extremely_hard_81
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.5..7...19..8..3...6...4....8....6..5..3.1..2..4....5....4...2...1..9..73...6..8.
|
458973261912856374763214598289745613576391842134628759895437126621589437347162985
|
. 5 . . 7 . . . 1
9 . . 8 . . 3 . .
. 6 . . . 4 . . .
. 8 . . . . 6 . .
5 . . 3 . 1 . . 2
. . 4 . . . . 5 .
. . . 4 . . . 2 .
. . 1 . . 9 . . 7
3 . . . 6 . . 8 .
|
4 5 8 9 7 3 2 6 1
9 1 2 8 5 6 3 7 4
7 6 3 2 1 4 5 9 8
2 8 9 7 4 5 6 1 3
5 7 6 3 9 1 8 4 2
1 3 4 6 2 8 7 5 9
8 9 5 4 3 7 1 2 6
6 2 1 5 8 9 4 3 7
3 4 7 1 6 2 9 8 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2210m
|
458973261912856374763214598289745613576391842134628759895437126621589437347162985 #1 Easy (348)
Hidden Single: r6c2=3
Hidden Single: r5c3=6
Hidden Single: r4c8=1
Hidden Single: r2c2=1
Hidden Single: r6c1=1
Hidden Single: r4c9=3
Hidden Single: r8c8=3
Hidden Single: r1c1=4
Hidden Single: r4c5=4
Hidden Single: r8c1=6
Hidden Single: r7c9=6
Hidden Single: r8c5=8
Naked Single: r5c5=9
Naked Single: r5c2=7
Naked Single: r6c5=2
Naked Single: r4c1=2
Full House: r4c3=9
Naked Single: r5c8=4
Full House: r5c7=8
Naked Single: r7c2=9
Naked Single: r2c5=5
Naked Single: r6c9=9
Full House: r6c7=7
Naked Single: r2c9=4
Naked Single: r6c4=6
Full House: r6c6=8
Naked Single: r9c9=5
Full House: r3c9=8
Naked Single: r7c7=1
Naked Single: r8c7=4
Full House: r9c7=9
Naked Single: r3c1=7
Full House: r7c1=8
Naked Single: r7c5=3
Full House: r3c5=1
Naked Single: r8c2=2
Full House: r8c4=5
Full House: r9c2=4
Naked Single: r1c7=2
Full House: r3c7=5
Naked Single: r2c3=2
Naked Single: r3c8=9
Naked Single: r9c3=7
Full House: r7c3=5
Full House: r7c6=7
Naked Single: r4c4=7
Full House: r4c6=5
Naked Single: r1c4=9
Naked Single: r2c6=6
Full House: r2c8=7
Full House: r1c8=6
Naked Single: r3c3=3
Full House: r3c4=2
Full House: r1c6=3
Full House: r9c6=2
Full House: r1c3=8
Full House: r9c4=1
|
sudoku_normal_hard_82
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
69...2.....1.59.8345.7.....9.5..67...8..1..3...49....5.....4.1.34..8.2...1.2....6
|
698132574721459683453768192935846721286517439174923865562374918349681257817295346
|
6 9 . . . 2 . . .
. . 1 . 5 9 . 8 3
4 5 . 7 . . . . .
9 . 5 . . 6 7 . .
. 8 . . 1 . . 3 .
. . 4 9 . . . . 5
. . . . . 4 . 1 .
3 4 . . 8 . 2 . .
. 1 . 2 . . . . 6
|
6 9 8 1 3 2 5 7 4
7 2 1 4 5 9 6 8 3
4 5 3 7 6 8 1 9 2
9 3 5 8 4 6 7 2 1
2 8 6 5 1 7 4 3 9
1 7 4 9 2 3 8 6 5
5 6 2 3 7 4 9 1 8
3 4 9 6 8 1 2 5 7
8 1 7 2 9 5 3 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2206h1
|
698132574721459683453768192935846721286517439174923865562374918349681257817295346 #1 Medium (874)
Naked Single: r2c6=9
Locked Candidates Type 1 (Pointing): 2 in b3 => r3c13<>2
Locked Candidates Type 1 (Pointing): 7 in b3 => r1c23<>7
Locked Candidates Type 1 (Pointing): 1 in b7 => r9c6<>1
Naked Pair: 4,6 in r2c47 => r2c1<>4
Hidden Single: r3c1=4
Locked Candidates Type 1 (Pointing): 8 in b1 => r79c3<>8
Naked Triple: 3,4,6 in r13c5,r2c4 => r1c4,r3c6<>3, r1c4<>4
Locked Candidates Type 1 (Pointing): 3 in b2 => r4679c5<>3
Naked Pair: 2,4 in r4c58 => r4c239<>2, r4c49<>4
Hidden Pair: 3,8 in r4c4,r6c6 => r4c4<>5, r6c6<>7
Hidden Single: r4c3=5
Locked Candidates Type 1 (Pointing): 3 in b4 => r1c2<>3
Naked Single: r1c2=9
Naked Pair: 7,9 in r9c35 => r9c1268<>7, r9c78<>9
Naked Single: r9c2=1
Naked Single: r4c2=3
Naked Single: r4c4=8
Naked Single: r1c4=1
Naked Single: r4c9=1
Naked Single: r6c6=3
Naked Single: r3c6=8
Naked Single: r9c6=5
Naked Single: r3c3=3
Naked Single: r5c6=7
Full House: r8c6=1
Naked Single: r8c4=6
Naked Single: r9c1=8
Naked Single: r9c8=4
Naked Single: r1c3=8
Naked Single: r3c5=6
Naked Single: r5c1=2
Naked Single: r6c5=2
Naked Single: r2c4=4
Full House: r1c5=3
Naked Single: r7c4=3
Full House: r5c4=5
Full House: r4c5=4
Full House: r4c8=2
Naked Single: r9c7=3
Naked Single: r2c1=7
Full House: r2c2=2
Full House: r2c7=6
Naked Single: r5c3=6
Naked Single: r6c8=6
Naked Single: r3c8=9
Naked Single: r6c1=1
Full House: r7c1=5
Full House: r6c2=7
Full House: r6c7=8
Full House: r7c2=6
Naked Single: r3c7=1
Full House: r3c9=2
Naked Single: r7c7=9
Naked Single: r5c7=4
Full House: r1c7=5
Full House: r5c9=9
Naked Single: r7c5=7
Full House: r9c5=9
Full House: r9c3=7
Naked Single: r8c9=7
Naked Single: r1c8=7
Full House: r1c9=4
Full House: r7c9=8
Full House: r7c3=2
Full House: r8c3=9
Full House: r8c8=5
|
sudoku_normal_extremely_hard_82
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
6....2.....1.5..83.5.7.....9....67...8..1..3...49....5.....4.1.34..8.2.....2....6
|
698132574721459683453768192935846721286517439174923865562374918349681257817295346
|
6 . . . . 2 . . .
. . 1 . 5 . . 8 3
. 5 . 7 . . . . .
9 . . . . 6 7 . .
. 8 . . 1 . . 3 .
. . 4 9 . . . . 5
. . . . . 4 . 1 .
3 4 . . 8 . 2 . .
. . . 2 . . . . 6
|
6 9 8 1 3 2 5 7 4
7 2 1 4 5 9 6 8 3
4 5 3 7 6 8 1 9 2
9 3 5 8 4 6 7 2 1
2 8 6 5 1 7 4 3 9
1 7 4 9 2 3 8 6 5
5 6 2 3 7 4 9 1 8
3 4 9 6 8 1 2 5 7
8 1 7 2 9 5 3 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2206h1
|
698132574721459683453768192935846721286517439174923865562374918349681257817295346 #1 Medium (874)
Naked Single: r2c6=9
Locked Candidates Type 1 (Pointing): 2 in b3 => r3c13<>2
Locked Candidates Type 1 (Pointing): 7 in b3 => r1c23<>7
Locked Candidates Type 1 (Pointing): 1 in b7 => r9c6<>1
Naked Pair: 4,6 in r2c47 => r2c1<>4
Hidden Single: r3c1=4
Locked Candidates Type 1 (Pointing): 8 in b1 => r79c3<>8
Naked Triple: 3,4,6 in r13c5,r2c4 => r1c4,r3c6<>3, r1c4<>4
Locked Candidates Type 1 (Pointing): 3 in b2 => r4679c5<>3
Naked Pair: 2,4 in r4c58 => r4c239<>2, r4c49<>4
Hidden Pair: 3,8 in r4c4,r6c6 => r4c4<>5, r6c6<>7
Hidden Single: r4c3=5
Locked Candidates Type 1 (Pointing): 3 in b4 => r1c2<>3
Naked Single: r1c2=9
Naked Pair: 7,9 in r9c35 => r9c1268<>7, r9c78<>9
Naked Single: r9c2=1
Naked Single: r4c2=3
Naked Single: r4c4=8
Naked Single: r1c4=1
Naked Single: r4c9=1
Naked Single: r6c6=3
Naked Single: r3c6=8
Naked Single: r9c6=5
Naked Single: r3c3=3
Naked Single: r5c6=7
Full House: r8c6=1
Naked Single: r8c4=6
Naked Single: r9c1=8
Naked Single: r9c8=4
Naked Single: r1c3=8
Naked Single: r3c5=6
Naked Single: r5c1=2
Naked Single: r6c5=2
Naked Single: r2c4=4
Full House: r1c5=3
Naked Single: r7c4=3
Full House: r5c4=5
Full House: r4c5=4
Full House: r4c8=2
Naked Single: r9c7=3
Naked Single: r2c1=7
Full House: r2c2=2
Full House: r2c7=6
Naked Single: r5c3=6
Naked Single: r6c8=6
Naked Single: r3c8=9
Naked Single: r6c1=1
Full House: r7c1=5
Full House: r6c2=7
Full House: r6c7=8
Full House: r7c2=6
Naked Single: r3c7=1
Full House: r3c9=2
Naked Single: r7c7=9
Naked Single: r5c7=4
Full House: r1c7=5
Full House: r5c9=9
Naked Single: r7c5=7
Full House: r9c5=9
Full House: r9c3=7
Naked Single: r8c9=7
Naked Single: r1c8=7
Full House: r1c9=4
Full House: r7c9=8
Full House: r7c3=2
Full House: r8c3=9
Full House: r8c8=5
|
sudoku_normal_hard_83
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
2..3...6...9.1...2.17..89..8..4..7...3.....2...2..6..49842651375..873496763149..8
|
248397561359614872617528943896432715435781629172956384984265137521873496763149258
|
2 . . 3 . . . 6 .
. . 9 . 1 . . . 2
. 1 7 . . 8 9 . .
8 . . 4 . . 7 . .
. 3 . . . . . 2 .
. . 2 . . 6 . . 4
9 8 4 2 6 5 1 3 7
5 . . 8 7 3 4 9 6
7 6 3 1 4 9 . . 8
|
2 4 8 3 9 7 5 6 1
3 5 9 6 1 4 8 7 2
6 1 7 5 2 8 9 4 3
8 9 6 4 3 2 7 1 5
4 3 5 7 8 1 6 2 9
1 7 2 9 5 6 3 8 4
9 8 4 2 6 5 1 3 7
5 2 1 8 7 3 4 9 6
7 6 3 1 4 9 2 5 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2208e
|
248397561359614872617528943896432715435781629172956384984265137521873496763149258 #1 Easy (212)
Naked Single: r7c6=5
Naked Single: r8c8=9
Naked Single: r9c4=1
Naked Single: r8c9=6
Naked Single: r8c6=3
Naked Single: r9c3=3
Naked Single: r7c9=7
Naked Single: r8c4=8
Naked Single: r9c5=4
Full House: r7c5=6
Naked Single: r9c1=7
Naked Single: r7c1=9
Full House: r7c2=8
Naked Single: r9c8=5
Full House: r9c7=2
Naked Single: r8c2=2
Full House: r8c3=1
Naked Single: r6c1=1
Naked Single: r3c8=4
Naked Single: r4c8=1
Naked Single: r6c8=8
Full House: r2c8=7
Naked Single: r4c6=2
Naked Single: r2c6=4
Naked Single: r1c6=7
Full House: r5c6=1
Naked Single: r2c2=5
Naked Single: r1c2=4
Naked Single: r1c3=8
Naked Single: r2c4=6
Naked Single: r4c2=9
Full House: r6c2=7
Naked Single: r1c7=5
Naked Single: r2c1=3
Full House: r2c7=8
Full House: r3c1=6
Full House: r5c1=4
Naked Single: r3c4=5
Naked Single: r1c5=9
Full House: r1c9=1
Full House: r3c9=3
Full House: r3c5=2
Naked Single: r5c7=6
Full House: r6c7=3
Naked Single: r6c4=9
Full House: r6c5=5
Full House: r5c4=7
Naked Single: r4c9=5
Full House: r5c9=9
Naked Single: r5c3=5
Full House: r5c5=8
Full House: r4c5=3
Full House: r4c3=6
|
sudoku_normal_extremely_hard_83
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
2..3...6...9.1...2.17..89..8..4..7...3.....2...2..6..4..42..13.5...7.4...6...9..8
|
248397561359614872617528943896432715435781629172956384984265137521873496763149258
|
2 . . 3 . . . 6 .
. . 9 . 1 . . . 2
. 1 7 . . 8 9 . .
8 . . 4 . . 7 . .
. 3 . . . . . 2 .
. . 2 . . 6 . . 4
. . 4 2 . . 1 3 .
5 . . . 7 . 4 . .
. 6 . . . 9 . . 8
|
2 4 8 3 9 7 5 6 1
3 5 9 6 1 4 8 7 2
6 1 7 5 2 8 9 4 3
8 9 6 4 3 2 7 1 5
4 3 5 7 8 1 6 2 9
1 7 2 9 5 6 3 8 4
9 8 4 2 6 5 1 3 7
5 2 1 8 7 3 4 9 6
7 6 3 1 4 9 2 5 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2208e
|
248397561359614872617528943896432715435781629172956384984265137521873496763149258 #1 Easy (212)
Naked Single: r7c6=5
Naked Single: r8c8=9
Naked Single: r9c4=1
Naked Single: r8c9=6
Naked Single: r8c6=3
Naked Single: r9c3=3
Naked Single: r7c9=7
Naked Single: r8c4=8
Naked Single: r9c5=4
Full House: r7c5=6
Naked Single: r9c1=7
Naked Single: r7c1=9
Full House: r7c2=8
Naked Single: r9c8=5
Full House: r9c7=2
Naked Single: r8c2=2
Full House: r8c3=1
Naked Single: r6c1=1
Naked Single: r3c8=4
Naked Single: r4c8=1
Naked Single: r6c8=8
Full House: r2c8=7
Naked Single: r4c6=2
Naked Single: r2c6=4
Naked Single: r1c6=7
Full House: r5c6=1
Naked Single: r2c2=5
Naked Single: r1c2=4
Naked Single: r1c3=8
Naked Single: r2c4=6
Naked Single: r4c2=9
Full House: r6c2=7
Naked Single: r1c7=5
Naked Single: r2c1=3
Full House: r2c7=8
Full House: r3c1=6
Full House: r5c1=4
Naked Single: r3c4=5
Naked Single: r1c5=9
Full House: r1c9=1
Full House: r3c9=3
Full House: r3c5=2
Naked Single: r5c7=6
Full House: r6c7=3
Naked Single: r6c4=9
Full House: r6c5=5
Full House: r5c4=7
Naked Single: r4c9=5
Full House: r5c9=9
Naked Single: r5c3=5
Full House: r5c5=8
Full House: r4c5=3
Full House: r4c3=6
|
sudoku_normal_hard_84
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..9.5.1.......9.5285.6...399735.4..6..5.9.3..2..3...1554..38..769.2.5.....8.4.5..
|
429753168316489752857621439973514286165892374284367915542138697691275843738946521
|
. . 9 . 5 . 1 . .
. . . . . 9 . 5 2
8 5 . 6 . . . 3 9
9 7 3 5 . 4 . . 6
. . 5 . 9 . 3 . .
2 . . 3 . . . 1 5
5 4 . . 3 8 . . 7
6 9 . 2 . 5 . . .
. . 8 . 4 . 5 . .
|
4 2 9 7 5 3 1 6 8
3 1 6 4 8 9 7 5 2
8 5 7 6 2 1 4 3 9
9 7 3 5 1 4 2 8 6
1 6 5 8 9 2 3 7 4
2 8 4 3 6 7 9 1 5
5 4 2 1 3 8 6 9 7
6 9 1 2 7 5 8 4 3
7 3 8 9 4 6 5 2 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2107h1
|
429753168316489752857621439973514286165892374284367915542138697691275843738946521 #1 Medium (544)
Naked Pair: 4,8 in r15c9 => r368c9<>4, r68c9<>8
Naked Pair: 5,9 in r36c9 => r89c9<>9
Naked Triple: 2,6,9 in r7c78,r9c8 => r8c78<>9
Hidden Single: r8c2=9
Hidden Single: r4c1=9
Hidden Single: r8c6=5
Hidden Single: r7c1=5
Hidden Single: r4c3=3
Hidden Single: r6c9=5
Naked Single: r3c9=9
Hidden Single: r4c4=5
Hidden Single: r7c5=3
Hidden Single: r3c2=5
Hidden Single: r2c8=5
Hidden Single: r6c7=9
Hidden Single: r4c5=1
Naked Single: r8c5=7
Naked Single: r2c5=8
Naked Single: r3c5=2
Full House: r6c5=6
Naked Single: r8c3=1
Naked Single: r6c2=8
Naked Single: r6c3=4
Full House: r6c6=7
Naked Single: r7c3=2
Naked Single: r8c9=3
Naked Single: r3c3=7
Full House: r2c3=6
Naked Single: r5c1=1
Full House: r5c2=6
Naked Single: r1c6=3
Naked Single: r3c6=1
Full House: r3c7=4
Naked Single: r5c4=8
Full House: r5c6=2
Full House: r9c6=6
Naked Single: r7c7=6
Naked Single: r9c2=3
Full House: r9c1=7
Naked Single: r9c9=1
Naked Single: r1c1=4
Full House: r2c1=3
Naked Single: r1c2=2
Full House: r2c2=1
Naked Single: r1c9=8
Full House: r5c9=4
Full House: r5c8=7
Naked Single: r2c7=7
Full House: r1c8=6
Full House: r1c4=7
Full House: r2c4=4
Naked Single: r8c7=8
Full House: r4c7=2
Full House: r8c8=4
Full House: r4c8=8
Naked Single: r7c8=9
Full House: r7c4=1
Full House: r9c4=9
Full House: r9c8=2
|
sudoku_normal_extremely_hard_84
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..9.5.1.......9..28..6...3..7...4..6..5.9.3..2..3...1..4...8..76..2.......8.4.5..
|
429753168316489752857621439973514286165892374284367915542138697691275843738946521
|
. . 9 . 5 . 1 . .
. . . . . 9 . . 2
8 . . 6 . . . 3 .
. 7 . . . 4 . . 6
. . 5 . 9 . 3 . .
2 . . 3 . . . 1 .
. 4 . . . 8 . . 7
6 . . 2 . . . . .
. . 8 . 4 . 5 . .
|
4 2 9 7 5 3 1 6 8
3 1 6 4 8 9 7 5 2
8 5 7 6 2 1 4 3 9
9 7 3 5 1 4 2 8 6
1 6 5 8 9 2 3 7 4
2 8 4 3 6 7 9 1 5
5 4 2 1 3 8 6 9 7
6 9 1 2 7 5 8 4 3
7 3 8 9 4 6 5 2 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2107h1
|
429753168316489752857621439973514286165892374284367915542138697691275843738946521 #1 Medium (544)
Naked Pair: 4,8 in r15c9 => r368c9<>4, r68c9<>8
Naked Pair: 5,9 in r36c9 => r89c9<>9
Naked Triple: 2,6,9 in r7c78,r9c8 => r8c78<>9
Hidden Single: r8c2=9
Hidden Single: r4c1=9
Hidden Single: r8c6=5
Hidden Single: r7c1=5
Hidden Single: r4c3=3
Hidden Single: r6c9=5
Naked Single: r3c9=9
Hidden Single: r4c4=5
Hidden Single: r7c5=3
Hidden Single: r3c2=5
Hidden Single: r2c8=5
Hidden Single: r6c7=9
Hidden Single: r4c5=1
Naked Single: r8c5=7
Naked Single: r2c5=8
Naked Single: r3c5=2
Full House: r6c5=6
Naked Single: r8c3=1
Naked Single: r6c2=8
Naked Single: r6c3=4
Full House: r6c6=7
Naked Single: r7c3=2
Naked Single: r8c9=3
Naked Single: r3c3=7
Full House: r2c3=6
Naked Single: r5c1=1
Full House: r5c2=6
Naked Single: r1c6=3
Naked Single: r3c6=1
Full House: r3c7=4
Naked Single: r5c4=8
Full House: r5c6=2
Full House: r9c6=6
Naked Single: r7c7=6
Naked Single: r9c2=3
Full House: r9c1=7
Naked Single: r9c9=1
Naked Single: r1c1=4
Full House: r2c1=3
Naked Single: r1c2=2
Full House: r2c2=1
Naked Single: r1c9=8
Full House: r5c9=4
Full House: r5c8=7
Naked Single: r2c7=7
Full House: r1c8=6
Full House: r1c4=7
Full House: r2c4=4
Naked Single: r8c7=8
Full House: r4c7=2
Full House: r8c8=4
Full House: r4c8=8
Naked Single: r7c8=9
Full House: r7c4=1
Full House: r9c4=9
Full House: r9c8=2
|
sudoku_normal_hard_85
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
4..738.2.798216354.6..59..7..43...9.5...8...3.3...14..64.19..7...5...6...7...2..1
|
451738926798216354362459187184367295526984713937521468643195872215873649879642531
|
4 . . 7 3 8 . 2 .
7 9 8 2 1 6 3 5 4
. 6 . . 5 9 . . 7
. . 4 3 . . . 9 .
5 . . . 8 . . . 3
. 3 . . . 1 4 . .
6 4 . 1 9 . . 7 .
. . 5 . . . 6 . .
. 7 . . . 2 . . 1
|
4 5 1 7 3 8 9 2 6
7 9 8 2 1 6 3 5 4
3 6 2 4 5 9 1 8 7
1 8 4 3 6 7 2 9 5
5 2 6 9 8 4 7 1 3
9 3 7 5 2 1 4 6 8
6 4 3 1 9 5 8 7 2
2 1 5 8 7 3 6 4 9
8 7 9 6 4 2 5 3 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1911h2
|
451738926798216354362459187184367295526984713937521468643195872215873649879642531 #1 Medium (566)
Hidden Single: r2c1=7
Locked Candidates Type 1 (Pointing): 3 in b2 => r1c3<>3
Hidden Pair: 6,7 in r56c3 => r5c3<>1, r56c3<>2, r56c3<>9
Locked Candidates Type 2 (Claiming): 1 in c3 => r12c2,r3c1<>1
Hidden Triple: 1,2,9 in r8c129 => r8c1<>3, r8c129<>8, r8c29<>4
Hidden Single: r7c2=4
Hidden Single: r2c9=4
Naked Single: r2c6=6
Naked Single: r2c4=2
Naked Single: r2c5=1
Naked Single: r1c5=3
Naked Single: r2c8=5
Full House: r2c2=9
Naked Single: r1c6=8
Full House: r3c4=4
Naked Single: r1c2=5
Naked Single: r1c3=1
Naked Single: r8c4=8
Naked Single: r1c7=9
Full House: r1c9=6
Hidden Single: r4c2=8
Hidden Single: r9c1=8
Naked Single: r9c7=5
Naked Single: r9c4=6
Naked Single: r5c4=9
Full House: r6c4=5
Naked Single: r9c5=4
Naked Single: r4c6=7
Naked Single: r8c5=7
Naked Single: r9c8=3
Full House: r9c3=9
Naked Single: r5c6=4
Naked Single: r8c6=3
Full House: r7c6=5
Naked Single: r8c8=4
Hidden Single: r6c1=9
Hidden Single: r8c9=9
Hidden Single: r4c5=6
Full House: r6c5=2
Naked Single: r6c9=8
Naked Single: r6c8=6
Full House: r6c3=7
Naked Single: r7c9=2
Full House: r4c9=5
Full House: r7c7=8
Full House: r7c3=3
Naked Single: r5c8=1
Full House: r3c8=8
Full House: r3c7=1
Naked Single: r5c3=6
Full House: r3c3=2
Full House: r3c1=3
Naked Single: r4c7=2
Full House: r4c1=1
Full House: r5c2=2
Full House: r5c7=7
Full House: r8c1=2
Full House: r8c2=1
|
sudoku_normal_extremely_hard_85
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
4..7...2...8...3...6..59..7..43...9.5...8...3.3...14..6..19..7...5...6...7...2..1
|
451738926798216354362459187184367295526984713937521468643195872215873649879642531
|
4 . . 7 . . . 2 .
. . 8 . . . 3 . .
. 6 . . 5 9 . . 7
. . 4 3 . . . 9 .
5 . . . 8 . . . 3
. 3 . . . 1 4 . .
6 . . 1 9 . . 7 .
. . 5 . . . 6 . .
. 7 . . . 2 . . 1
|
4 5 1 7 3 8 9 2 6
7 9 8 2 1 6 3 5 4
3 6 2 4 5 9 1 8 7
1 8 4 3 6 7 2 9 5
5 2 6 9 8 4 7 1 3
9 3 7 5 2 1 4 6 8
6 4 3 1 9 5 8 7 2
2 1 5 8 7 3 6 4 9
8 7 9 6 4 2 5 3 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1911h2
|
451738926798216354362459187184367295526984713937521468643195872215873649879642531 #1 Medium (566)
Hidden Single: r2c1=7
Locked Candidates Type 1 (Pointing): 3 in b2 => r1c3<>3
Hidden Pair: 6,7 in r56c3 => r5c3<>1, r56c3<>2, r56c3<>9
Locked Candidates Type 2 (Claiming): 1 in c3 => r12c2,r3c1<>1
Hidden Triple: 1,2,9 in r8c129 => r8c1<>3, r8c129<>8, r8c29<>4
Hidden Single: r7c2=4
Hidden Single: r2c9=4
Naked Single: r2c6=6
Naked Single: r2c4=2
Naked Single: r2c5=1
Naked Single: r1c5=3
Naked Single: r2c8=5
Full House: r2c2=9
Naked Single: r1c6=8
Full House: r3c4=4
Naked Single: r1c2=5
Naked Single: r1c3=1
Naked Single: r8c4=8
Naked Single: r1c7=9
Full House: r1c9=6
Hidden Single: r4c2=8
Hidden Single: r9c1=8
Naked Single: r9c7=5
Naked Single: r9c4=6
Naked Single: r5c4=9
Full House: r6c4=5
Naked Single: r9c5=4
Naked Single: r4c6=7
Naked Single: r8c5=7
Naked Single: r9c8=3
Full House: r9c3=9
Naked Single: r5c6=4
Naked Single: r8c6=3
Full House: r7c6=5
Naked Single: r8c8=4
Hidden Single: r6c1=9
Hidden Single: r8c9=9
Hidden Single: r4c5=6
Full House: r6c5=2
Naked Single: r6c9=8
Naked Single: r6c8=6
Full House: r6c3=7
Naked Single: r7c9=2
Full House: r4c9=5
Full House: r7c7=8
Full House: r7c3=3
Naked Single: r5c8=1
Full House: r3c8=8
Full House: r3c7=1
Naked Single: r5c3=6
Full House: r3c3=2
Full House: r3c1=3
Naked Single: r4c7=2
Full House: r4c1=1
Full House: r5c2=2
Full House: r5c7=7
Full House: r8c1=2
Full House: r8c2=1
|
sudoku_normal_hard_86
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..69.2..1...5..3..9..4...2.5391284762786945..16.735.9..2.3.9..4..52.6...4..8.71..
|
356982741742561389981473625539128476278694513164735298627319854815246937493857162
|
. . 6 9 . 2 . . 1
. . . 5 . . 3 . .
9 . . 4 . . . 2 .
5 3 9 1 2 8 4 7 6
2 7 8 6 9 4 5 . .
1 6 . 7 3 5 . 9 .
. 2 . 3 . 9 . . 4
. . 5 2 . 6 . . .
4 . . 8 . 7 1 . .
|
3 5 6 9 8 2 7 4 1
7 4 2 5 6 1 3 8 9
9 8 1 4 7 3 6 2 5
5 3 9 1 2 8 4 7 6
2 7 8 6 9 4 5 1 3
1 6 4 7 3 5 2 9 8
6 2 7 3 1 9 8 5 4
8 1 5 2 4 6 9 3 7
4 9 3 8 5 7 1 6 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2209e
|
356982741742561389981473625539128476278694513164735298627319854815246937493857162 #1 Easy (208)
Naked Single: r4c4=1
Naked Single: r4c1=5
Naked Single: r4c7=4
Full House: r4c3=9
Naked Single: r5c4=6
Naked Single: r5c6=4
Full House: r6c6=5
Naked Single: r7c4=3
Naked Single: r5c2=7
Naked Single: r1c4=9
Full House: r8c4=2
Naked Single: r9c6=7
Naked Single: r5c1=2
Full House: r6c3=4
Naked Single: r9c2=9
Naked Single: r2c6=1
Full House: r3c6=3
Naked Single: r9c3=3
Naked Single: r9c5=5
Naked Single: r5c9=3
Full House: r5c8=1
Naked Single: r7c5=1
Full House: r8c5=4
Naked Single: r9c8=6
Full House: r9c9=2
Naked Single: r7c3=7
Naked Single: r6c9=8
Full House: r6c7=2
Naked Single: r2c3=2
Full House: r3c3=1
Naked Single: r7c7=8
Naked Single: r8c1=8
Naked Single: r1c7=7
Naked Single: r7c1=6
Full House: r7c8=5
Full House: r8c2=1
Naked Single: r8c8=3
Naked Single: r2c1=7
Full House: r1c1=3
Naked Single: r1c5=8
Naked Single: r2c9=9
Naked Single: r3c7=6
Full House: r8c7=9
Full House: r8c9=7
Full House: r3c9=5
Naked Single: r1c8=4
Full House: r1c2=5
Full House: r2c8=8
Naked Single: r2c5=6
Full House: r3c5=7
Full House: r3c2=8
Full House: r2c2=4
|
sudoku_normal_extremely_hard_86
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..6..2..1...5..3..9..4...2..3..28.76..8.9.5..16.73..9..2...9..4..5..6...4..8..1..
|
356982741742561389981473625539128476278694513164735298627319854815246937493857162
|
. . 6 . . 2 . . 1
. . . 5 . . 3 . .
9 . . 4 . . . 2 .
. 3 . . 2 8 . 7 6
. . 8 . 9 . 5 . .
1 6 . 7 3 . . 9 .
. 2 . . . 9 . . 4
. . 5 . . 6 . . .
4 . . 8 . . 1 . .
|
3 5 6 9 8 2 7 4 1
7 4 2 5 6 1 3 8 9
9 8 1 4 7 3 6 2 5
5 3 9 1 2 8 4 7 6
2 7 8 6 9 4 5 1 3
1 6 4 7 3 5 2 9 8
6 2 7 3 1 9 8 5 4
8 1 5 2 4 6 9 3 7
4 9 3 8 5 7 1 6 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2209e
|
356982741742561389981473625539128476278694513164735298627319854815246937493857162 #1 Easy (208)
Naked Single: r4c4=1
Naked Single: r4c1=5
Naked Single: r4c7=4
Full House: r4c3=9
Naked Single: r5c4=6
Naked Single: r5c6=4
Full House: r6c6=5
Naked Single: r7c4=3
Naked Single: r5c2=7
Naked Single: r1c4=9
Full House: r8c4=2
Naked Single: r9c6=7
Naked Single: r5c1=2
Full House: r6c3=4
Naked Single: r9c2=9
Naked Single: r2c6=1
Full House: r3c6=3
Naked Single: r9c3=3
Naked Single: r9c5=5
Naked Single: r5c9=3
Full House: r5c8=1
Naked Single: r7c5=1
Full House: r8c5=4
Naked Single: r9c8=6
Full House: r9c9=2
Naked Single: r7c3=7
Naked Single: r6c9=8
Full House: r6c7=2
Naked Single: r2c3=2
Full House: r3c3=1
Naked Single: r7c7=8
Naked Single: r8c1=8
Naked Single: r1c7=7
Naked Single: r7c1=6
Full House: r7c8=5
Full House: r8c2=1
Naked Single: r8c8=3
Naked Single: r2c1=7
Full House: r1c1=3
Naked Single: r1c5=8
Naked Single: r2c9=9
Naked Single: r3c7=6
Full House: r8c7=9
Full House: r8c9=7
Full House: r3c9=5
Naked Single: r1c8=4
Full House: r1c2=5
Full House: r2c8=8
Naked Single: r2c5=6
Full House: r3c5=7
Full House: r3c2=8
Full House: r2c2=4
|
sudoku_normal_hard_87
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.3.2..65.1.6..5.3...5376..86..1...2...3...9.629..68..48..95.76..5.6....1.62.14.9.
|
438291657176485239925376148647139825583742916291568374814953762359627481762814593
|
. 3 . 2 . . 6 5 .
1 . 6 . . 5 . 3 .
. . 5 3 7 6 . . 8
6 . . 1 . . . 2 .
. . 3 . . . 9 . 6
2 9 . . 6 8 . . 4
8 . . 9 5 . 7 6 .
. 5 . 6 . . . . 1
. 6 2 . 1 4 . 9 .
|
4 3 8 2 9 1 6 5 7
1 7 6 4 8 5 2 3 9
9 2 5 3 7 6 1 4 8
6 4 7 1 3 9 8 2 5
5 8 3 7 4 2 9 1 6
2 9 1 5 6 8 3 7 4
8 1 4 9 5 3 7 6 2
3 5 9 6 2 7 4 8 1
7 6 2 8 1 4 5 9 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304h2
|
438291657176485239925376148647139825583742916291568374814953762359627481762814593 #1 Medium (470)
Locked Candidates Type 2 (Claiming): 5 in r4 => r5c89,r6c78<>5
Hidden Single: r1c8=5
Locked Candidates Type 1 (Pointing): 1 in b3 => r3c6<>1
Locked Candidates Type 1 (Pointing): 7 in b3 => r45c9<>7
Naked Single: r5c9=6
Hidden Single: r3c6=6
Hidden Single: r6c5=6
Hidden Single: r7c8=6
Hidden Single: r9c2=6
Hidden Single: r3c4=3
Naked Single: r7c4=9
Hidden Single: r6c1=2
Hidden Single: r2c3=6
Hidden Single: r9c5=1
Hidden Single: r6c7=3
Naked Single: r4c9=5
Naked Single: r4c7=8
Naked Single: r9c9=3
Naked Single: r9c7=5
Naked Single: r7c9=2
Naked Single: r9c1=7
Full House: r9c4=8
Naked Single: r7c6=3
Naked Single: r8c7=4
Full House: r8c8=8
Naked Single: r2c4=4
Naked Single: r8c5=2
Full House: r8c6=7
Naked Single: r2c7=2
Full House: r3c7=1
Naked Single: r8c3=9
Full House: r8c1=3
Naked Single: r5c5=4
Naked Single: r4c6=9
Naked Single: r5c6=2
Full House: r1c6=1
Naked Single: r3c8=4
Naked Single: r5c1=5
Naked Single: r4c5=3
Naked Single: r3c1=9
Full House: r3c2=2
Full House: r1c1=4
Naked Single: r5c4=7
Full House: r6c4=5
Naked Single: r5c8=1
Full House: r5c2=8
Full House: r6c8=7
Full House: r6c3=1
Naked Single: r2c2=7
Full House: r1c3=8
Naked Single: r7c3=4
Full House: r4c3=7
Full House: r4c2=4
Full House: r7c2=1
Naked Single: r2c9=9
Full House: r1c9=7
Full House: r1c5=9
Full House: r2c5=8
|
sudoku_normal_extremely_hard_87
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.3.2..6..1....5.3...5.7...86..1...2...3...9...9...8..48...5.7...5.6....1..2..4.9.
|
438291657176485239925376148647139825583742916291568374814953762359627481762814593
|
. 3 . 2 . . 6 . .
1 . . . . 5 . 3 .
. . 5 . 7 . . . 8
6 . . 1 . . . 2 .
. . 3 . . . 9 . .
. 9 . . . 8 . . 4
8 . . . 5 . 7 . .
. 5 . 6 . . . . 1
. . 2 . . 4 . 9 .
|
4 3 8 2 9 1 6 5 7
1 7 6 4 8 5 2 3 9
9 2 5 3 7 6 1 4 8
6 4 7 1 3 9 8 2 5
5 8 3 7 4 2 9 1 6
2 9 1 5 6 8 3 7 4
8 1 4 9 5 3 7 6 2
3 5 9 6 2 7 4 8 1
7 6 2 8 1 4 5 9 3
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304h2
|
438291657176485239925376148647139825583742916291568374814953762359627481762814593 #1 Medium (470)
Locked Candidates Type 2 (Claiming): 5 in r4 => r5c89,r6c78<>5
Hidden Single: r1c8=5
Locked Candidates Type 1 (Pointing): 1 in b3 => r3c6<>1
Locked Candidates Type 1 (Pointing): 7 in b3 => r45c9<>7
Naked Single: r5c9=6
Hidden Single: r3c6=6
Hidden Single: r6c5=6
Hidden Single: r7c8=6
Hidden Single: r9c2=6
Hidden Single: r3c4=3
Naked Single: r7c4=9
Hidden Single: r6c1=2
Hidden Single: r2c3=6
Hidden Single: r9c5=1
Hidden Single: r6c7=3
Naked Single: r4c9=5
Naked Single: r4c7=8
Naked Single: r9c9=3
Naked Single: r9c7=5
Naked Single: r7c9=2
Naked Single: r9c1=7
Full House: r9c4=8
Naked Single: r7c6=3
Naked Single: r8c7=4
Full House: r8c8=8
Naked Single: r2c4=4
Naked Single: r8c5=2
Full House: r8c6=7
Naked Single: r2c7=2
Full House: r3c7=1
Naked Single: r8c3=9
Full House: r8c1=3
Naked Single: r5c5=4
Naked Single: r4c6=9
Naked Single: r5c6=2
Full House: r1c6=1
Naked Single: r3c8=4
Naked Single: r5c1=5
Naked Single: r4c5=3
Naked Single: r3c1=9
Full House: r3c2=2
Full House: r1c1=4
Naked Single: r5c4=7
Full House: r6c4=5
Naked Single: r5c8=1
Full House: r5c2=8
Full House: r6c8=7
Full House: r6c3=1
Naked Single: r2c2=7
Full House: r1c3=8
Naked Single: r7c3=4
Full House: r4c3=7
Full House: r4c2=4
Full House: r7c2=1
Naked Single: r2c9=9
Full House: r1c9=7
Full House: r1c5=9
Full House: r2c5=8
|
sudoku_normal_hard_88
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..976.5.8.18..5.795.748...3781...9.....1.7.....48..76.14..78..5.7.9...8.8.3.2.4.7
|
329761548418235679567489123781643952652197834934852761146378295275914386893526417
|
. . 9 7 6 . 5 . 8
. 1 8 . . 5 . 7 9
5 . 7 4 8 . . . 3
7 8 1 . . . 9 . .
. . . 1 . 7 . . .
. . 4 8 . . 7 6 .
1 4 . . 7 8 . . 5
. 7 . 9 . . . 8 .
8 . 3 . 2 . 4 . 7
|
3 2 9 7 6 1 5 4 8
4 1 8 2 3 5 6 7 9
5 6 7 4 8 9 1 2 3
7 8 1 6 4 3 9 5 2
6 5 2 1 9 7 8 3 4
9 3 4 8 5 2 7 6 1
1 4 6 3 7 8 2 9 5
2 7 5 9 1 4 3 8 6
8 9 3 5 2 6 4 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2211m
|
329761548418235679567489123781643952652197834934852761146378295275914386893526417 #1 Easy (368)
Hidden Single: r4c3=1
Hidden Single: r9c1=8
Hidden Single: r3c3=7
Hidden Single: r1c4=7
Hidden Single: r7c5=7
Hidden Single: r2c3=8
Hidden Single: r9c9=7
Hidden Single: r1c9=8
Hidden Single: r6c7=7
Hidden Single: r7c2=4
Hidden Single: r6c4=8
Hidden Single: r3c5=8
Hidden Single: r4c1=7
Hidden Single: r2c9=9
Naked Single: r2c5=3
Naked Single: r2c4=2
Naked Single: r1c6=1
Full House: r3c6=9
Naked Single: r2c7=6
Full House: r2c1=4
Naked Single: r9c6=6
Naked Single: r7c4=3
Naked Single: r9c4=5
Full House: r4c4=6
Naked Single: r7c7=2
Naked Single: r8c6=4
Full House: r8c5=1
Naked Single: r9c2=9
Full House: r9c8=1
Naked Single: r3c7=1
Naked Single: r7c3=6
Full House: r7c8=9
Naked Single: r8c7=3
Full House: r8c9=6
Full House: r5c7=8
Naked Single: r3c8=2
Full House: r1c8=4
Full House: r3c2=6
Naked Single: r8c1=2
Full House: r8c3=5
Full House: r5c3=2
Naked Single: r1c1=3
Full House: r1c2=2
Naked Single: r5c9=4
Naked Single: r6c1=9
Full House: r5c1=6
Naked Single: r4c9=2
Full House: r6c9=1
Naked Single: r6c5=5
Naked Single: r4c6=3
Full House: r6c6=2
Full House: r6c2=3
Full House: r5c2=5
Naked Single: r4c5=4
Full House: r5c5=9
Full House: r4c8=5
Full House: r5c8=3
|
sudoku_normal_extremely_hard_88
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..9.6.5...1...5.7.5..4....3.8....9.....1.7.....4....6.1....8..5.7.9...8...3.2.4..
|
329761548418235679567489123781643952652197834934852761146378295275914386893526417
|
. . 9 . 6 . 5 . .
. 1 . . . 5 . 7 .
5 . . 4 . . . . 3
. 8 . . . . 9 . .
. . . 1 . 7 . . .
. . 4 . . . . 6 .
1 . . . . 8 . . 5
. 7 . 9 . . . 8 .
. . 3 . 2 . 4 . .
|
3 2 9 7 6 1 5 4 8
4 1 8 2 3 5 6 7 9
5 6 7 4 8 9 1 2 3
7 8 1 6 4 3 9 5 2
6 5 2 1 9 7 8 3 4
9 3 4 8 5 2 7 6 1
1 4 6 3 7 8 2 9 5
2 7 5 9 1 4 3 8 6
8 9 3 5 2 6 4 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2211m
|
329761548418235679567489123781643952652197834934852761146378295275914386893526417 #1 Easy (368)
Hidden Single: r4c3=1
Hidden Single: r9c1=8
Hidden Single: r3c3=7
Hidden Single: r1c4=7
Hidden Single: r7c5=7
Hidden Single: r2c3=8
Hidden Single: r9c9=7
Hidden Single: r1c9=8
Hidden Single: r6c7=7
Hidden Single: r7c2=4
Hidden Single: r6c4=8
Hidden Single: r3c5=8
Hidden Single: r4c1=7
Hidden Single: r2c9=9
Naked Single: r2c5=3
Naked Single: r2c4=2
Naked Single: r1c6=1
Full House: r3c6=9
Naked Single: r2c7=6
Full House: r2c1=4
Naked Single: r9c6=6
Naked Single: r7c4=3
Naked Single: r9c4=5
Full House: r4c4=6
Naked Single: r7c7=2
Naked Single: r8c6=4
Full House: r8c5=1
Naked Single: r9c2=9
Full House: r9c8=1
Naked Single: r3c7=1
Naked Single: r7c3=6
Full House: r7c8=9
Naked Single: r8c7=3
Full House: r8c9=6
Full House: r5c7=8
Naked Single: r3c8=2
Full House: r1c8=4
Full House: r3c2=6
Naked Single: r8c1=2
Full House: r8c3=5
Full House: r5c3=2
Naked Single: r1c1=3
Full House: r1c2=2
Naked Single: r5c9=4
Naked Single: r6c1=9
Full House: r5c1=6
Naked Single: r4c9=2
Full House: r6c9=1
Naked Single: r6c5=5
Naked Single: r4c6=3
Full House: r6c6=2
Full House: r6c2=3
Full House: r5c2=5
Naked Single: r4c5=4
Full House: r5c5=9
Full House: r4c8=5
Full House: r5c8=3
|
sudoku_normal_hard_89
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.4.5..1982.9.4..53..8.3..2.9..1...46.8..5.9726....4.31.9..8.3154......898.2..5.6.
|
347526198269841753518739624923178546184653972675294831796482315451367289832915467
|
. 4 . 5 . . 1 9 8
2 . 9 . 4 . . 5 3
. . 8 . 3 . . 2 .
9 . . 1 . . . 4 6
. 8 . . 5 . 9 7 2
6 . . . . 4 . 3 1
. 9 . . 8 . 3 1 5
4 . . . . . . 8 9
8 . 2 . . 5 . 6 .
|
3 4 7 5 2 6 1 9 8
2 6 9 8 4 1 7 5 3
5 1 8 7 3 9 6 2 4
9 2 3 1 7 8 5 4 6
1 8 4 6 5 3 9 7 2
6 7 5 2 9 4 8 3 1
7 9 6 4 8 2 3 1 5
4 5 1 3 6 7 2 8 9
8 3 2 9 1 5 4 6 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2103h2
|
347526198269841753518739624923178546184653972675294831796482315451367289832915467 #1 Medium (304)
Hidden Single: r9c1=8
Hidden Single: r1c9=8
Naked Single: r1c8=9
Hidden Single: r2c3=9
Locked Pair: 4,7 in r9c79 => r7c9,r8c7,r9c245<>7, r7c89,r9c45<>4
Hidden Single: r2c5=4
Naked Single: r2c8=5
Naked Single: r7c8=1
Naked Single: r8c8=8
Naked Single: r6c8=3
Full House: r4c8=4
Naked Single: r5c9=2
Naked Single: r5c7=9
Naked Single: r7c9=5
Naked Single: r7c1=7
Naked Single: r8c7=2
Naked Single: r1c1=3
Naked Single: r7c3=6
Naked Single: r5c1=1
Full House: r3c1=5
Naked Single: r1c3=7
Naked Single: r7c6=2
Full House: r7c4=4
Naked Single: r6c3=5
Naked Single: r1c6=6
Full House: r1c5=2
Naked Single: r4c3=3
Naked Single: r6c7=8
Full House: r4c7=5
Naked Single: r5c6=3
Naked Single: r4c5=7
Naked Single: r5c3=4
Full House: r8c3=1
Full House: r5c4=6
Naked Single: r4c2=2
Full House: r4c6=8
Full House: r6c2=7
Naked Single: r6c5=9
Full House: r6c4=2
Naked Single: r8c5=6
Full House: r9c5=1
Naked Single: r8c6=7
Naked Single: r9c2=3
Full House: r8c2=5
Full House: r8c4=3
Full House: r9c4=9
Naked Single: r2c6=1
Full House: r3c6=9
Naked Single: r3c4=7
Full House: r2c4=8
Naked Single: r2c2=6
Full House: r2c7=7
Full House: r3c2=1
Naked Single: r3c9=4
Full House: r3c7=6
Full House: r9c7=4
Full House: r9c9=7
|
sudoku_normal_extremely_hard_89
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.4.5..1..2.......3..8.3..2.9..1....6.8..5..7.6....4..1.9..8.3..4.......9..2..5.6.
|
347526198269841753518739624923178546184653972675294831796482315451367289832915467
|
. 4 . 5 . . 1 . .
2 . . . . . . . 3
. . 8 . 3 . . 2 .
9 . . 1 . . . . 6
. 8 . . 5 . . 7 .
6 . . . . 4 . . 1
. 9 . . 8 . 3 . .
4 . . . . . . . 9
. . 2 . . 5 . 6 .
|
3 4 7 5 2 6 1 9 8
2 6 9 8 4 1 7 5 3
5 1 8 7 3 9 6 2 4
9 2 3 1 7 8 5 4 6
1 8 4 6 5 3 9 7 2
6 7 5 2 9 4 8 3 1
7 9 6 4 8 2 3 1 5
4 5 1 3 6 7 2 8 9
8 3 2 9 1 5 4 6 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2103h2
|
347526198269841753518739624923178546184653972675294831796482315451367289832915467 #1 Medium (304)
Hidden Single: r9c1=8
Hidden Single: r1c9=8
Naked Single: r1c8=9
Hidden Single: r2c3=9
Locked Pair: 4,7 in r9c79 => r7c9,r8c7,r9c245<>7, r7c89,r9c45<>4
Hidden Single: r2c5=4
Naked Single: r2c8=5
Naked Single: r7c8=1
Naked Single: r8c8=8
Naked Single: r6c8=3
Full House: r4c8=4
Naked Single: r5c9=2
Naked Single: r5c7=9
Naked Single: r7c9=5
Naked Single: r7c1=7
Naked Single: r8c7=2
Naked Single: r1c1=3
Naked Single: r7c3=6
Naked Single: r5c1=1
Full House: r3c1=5
Naked Single: r1c3=7
Naked Single: r7c6=2
Full House: r7c4=4
Naked Single: r6c3=5
Naked Single: r1c6=6
Full House: r1c5=2
Naked Single: r4c3=3
Naked Single: r6c7=8
Full House: r4c7=5
Naked Single: r5c6=3
Naked Single: r4c5=7
Naked Single: r5c3=4
Full House: r8c3=1
Full House: r5c4=6
Naked Single: r4c2=2
Full House: r4c6=8
Full House: r6c2=7
Naked Single: r6c5=9
Full House: r6c4=2
Naked Single: r8c5=6
Full House: r9c5=1
Naked Single: r8c6=7
Naked Single: r9c2=3
Full House: r8c2=5
Full House: r8c4=3
Full House: r9c4=9
Naked Single: r2c6=1
Full House: r3c6=9
Naked Single: r3c4=7
Full House: r2c4=8
Naked Single: r2c2=6
Full House: r2c7=7
Full House: r3c2=1
Naked Single: r3c9=4
Full House: r3c7=6
Full House: r9c7=4
Full House: r9c9=7
|
sudoku_normal_hard_90
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
853624719..7.15....1....4..5..4...813.1.8...279...1..61.5.4..9....75.1..2..163...
|
853624719467915238912378465526497381341586972798231546135842697684759123279163854
|
8 5 3 6 2 4 7 1 9
. . 7 . 1 5 . . .
. 1 . . . . 4 . .
5 . . 4 . . . 8 1
3 . 1 . 8 . . . 2
7 9 . . . 1 . . 6
1 . 5 . 4 . . 9 .
. . . 7 5 . 1 . .
2 . . 1 6 3 . . .
|
8 5 3 6 2 4 7 1 9
4 6 7 9 1 5 2 3 8
9 1 2 3 7 8 4 6 5
5 2 6 4 9 7 3 8 1
3 4 1 5 8 6 9 7 2
7 9 8 2 3 1 5 4 6
1 3 5 8 4 2 6 9 7
6 8 4 7 5 9 1 2 3
2 7 9 1 6 3 8 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2303m
|
853624719467915238912378465526497381341586972798231546135842697684759123279163854 #1 Easy (332)
Hidden Single: r1c2=5
Hidden Single: r1c8=1
Hidden Single: r7c1=1
Naked Single: r7c5=4
Hidden Single: r4c9=1
Hidden Single: r5c3=1
Hidden Single: r2c5=1
Hidden Single: r9c4=1
Hidden Single: r6c1=7
Hidden Single: r1c6=4
Naked Single: r1c1=8
Naked Single: r1c3=3
Full House: r1c7=7
Hidden Single: r8c5=5
Naked Single: r6c5=3
Naked Single: r6c7=5
Naked Single: r5c7=9
Naked Single: r6c4=2
Naked Single: r6c8=4
Full House: r6c3=8
Naked Single: r9c7=8
Naked Single: r4c7=3
Full House: r5c8=7
Naked Single: r5c4=5
Naked Single: r7c4=8
Naked Single: r5c6=6
Full House: r5c2=4
Naked Single: r9c8=5
Naked Single: r7c6=2
Full House: r8c6=9
Naked Single: r9c2=7
Naked Single: r7c7=6
Full House: r2c7=2
Naked Single: r4c6=7
Full House: r3c6=8
Full House: r4c5=9
Full House: r3c5=7
Naked Single: r9c9=4
Full House: r9c3=9
Naked Single: r7c2=3
Full House: r7c9=7
Naked Single: r2c2=6
Naked Single: r8c9=3
Full House: r8c8=2
Naked Single: r2c8=3
Full House: r3c8=6
Naked Single: r3c1=9
Naked Single: r3c3=2
Full House: r2c1=4
Full House: r8c1=6
Naked Single: r4c2=2
Full House: r8c2=8
Full House: r4c3=6
Full House: r8c3=4
Naked Single: r2c9=8
Full House: r3c9=5
Full House: r2c4=9
Full House: r3c4=3
|
sudoku_normal_extremely_hard_90
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
...62...9..7..5....1....4..5..4...8.3...8...2.9...1..6..5....9....7..1..2...63...
|
853624719467915238912378465526497381341586972798231546135842697684759123279163854
|
. . . 6 2 . . . 9
. . 7 . . 5 . . .
. 1 . . . . 4 . .
5 . . 4 . . . 8 .
3 . . . 8 . . . 2
. 9 . . . 1 . . 6
. . 5 . . . . 9 .
. . . 7 . . 1 . .
2 . . . 6 3 . . .
|
8 5 3 6 2 4 7 1 9
4 6 7 9 1 5 2 3 8
9 1 2 3 7 8 4 6 5
5 2 6 4 9 7 3 8 1
3 4 1 5 8 6 9 7 2
7 9 8 2 3 1 5 4 6
1 3 5 8 4 2 6 9 7
6 8 4 7 5 9 1 2 3
2 7 9 1 6 3 8 5 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2303m
|
853624719467915238912378465526497381341586972798231546135842697684759123279163854 #1 Easy (332)
Hidden Single: r1c2=5
Hidden Single: r1c8=1
Hidden Single: r7c1=1
Naked Single: r7c5=4
Hidden Single: r4c9=1
Hidden Single: r5c3=1
Hidden Single: r2c5=1
Hidden Single: r9c4=1
Hidden Single: r6c1=7
Hidden Single: r1c6=4
Naked Single: r1c1=8
Naked Single: r1c3=3
Full House: r1c7=7
Hidden Single: r8c5=5
Naked Single: r6c5=3
Naked Single: r6c7=5
Naked Single: r5c7=9
Naked Single: r6c4=2
Naked Single: r6c8=4
Full House: r6c3=8
Naked Single: r9c7=8
Naked Single: r4c7=3
Full House: r5c8=7
Naked Single: r5c4=5
Naked Single: r7c4=8
Naked Single: r5c6=6
Full House: r5c2=4
Naked Single: r9c8=5
Naked Single: r7c6=2
Full House: r8c6=9
Naked Single: r9c2=7
Naked Single: r7c7=6
Full House: r2c7=2
Naked Single: r4c6=7
Full House: r3c6=8
Full House: r4c5=9
Full House: r3c5=7
Naked Single: r9c9=4
Full House: r9c3=9
Naked Single: r7c2=3
Full House: r7c9=7
Naked Single: r2c2=6
Naked Single: r8c9=3
Full House: r8c8=2
Naked Single: r2c8=3
Full House: r3c8=6
Naked Single: r3c1=9
Naked Single: r3c3=2
Full House: r2c1=4
Full House: r8c1=6
Naked Single: r4c2=2
Full House: r8c2=8
Full House: r4c3=6
Full House: r8c3=4
Naked Single: r2c9=8
Full House: r3c9=5
Full House: r2c4=9
Full House: r3c4=3
|
sudoku_normal_hard_91
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.5.2871.33875412961..6...8...61......2.....5......86...7..14..9..382.47.8..9...1.
|
659287143387541296142639587496152738728463951531798624275314869913826475864975312
|
. 5 . 2 8 7 1 . 3
3 8 7 5 4 1 2 9 6
1 . . 6 . . . 8 .
. . 6 1 . . . . .
. 2 . . . . . 5 .
. . . . . 8 6 . .
. 7 . . 1 4 . . 9
. . 3 8 2 . 4 7 .
8 . . 9 . . . 1 .
|
6 5 9 2 8 7 1 4 3
3 8 7 5 4 1 2 9 6
1 4 2 6 3 9 5 8 7
4 9 6 1 5 2 7 3 8
7 2 8 4 6 3 9 5 1
5 3 1 7 9 8 6 2 4
2 7 5 3 1 4 8 6 9
9 1 3 8 2 6 4 7 5
8 6 4 9 7 5 3 1 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2202h2
|
659287143387541296142639587496152738728463951531798624275314869913826475864975312 #1 Hard (438)
Hidden Pair: 1,8 in r17c5 => r1c5<>9, r7c5<>3, r7c5<>5, r7c5<>6
X-Wing: 6 r17 c18 => r2c18,r8c18<>6
Naked Single: r2c8=9
Naked Single: r8c8=7
Naked Single: r1c7=1
Naked Single: r2c1=3
Naked Single: r1c5=8
Naked Single: r1c4=2
Naked Single: r2c4=5
Naked Single: r7c5=1
Naked Single: r2c6=1
Naked Single: r2c9=6
Full House: r2c2=8
Naked Single: r8c4=8
Naked Single: r1c8=4
Naked Single: r7c4=3
Naked Single: r8c9=5
Naked Single: r1c3=9
Full House: r1c1=6
Naked Single: r3c9=7
Full House: r3c7=5
Naked Single: r7c7=8
Naked Single: r8c1=9
Naked Single: r8c6=6
Full House: r8c2=1
Naked Single: r9c7=3
Naked Single: r9c9=2
Full House: r7c8=6
Naked Single: r3c2=4
Full House: r3c3=2
Naked Single: r9c6=5
Full House: r9c5=7
Naked Single: r9c2=6
Full House: r9c3=4
Naked Single: r7c3=5
Full House: r7c1=2
Naked Single: r6c3=1
Full House: r5c3=8
Naked Single: r6c9=4
Naked Single: r4c9=8
Full House: r5c9=1
Naked Single: r6c4=7
Full House: r5c4=4
Naked Single: r6c1=5
Naked Single: r5c1=7
Full House: r4c1=4
Naked Single: r5c7=9
Full House: r4c7=7
Naked Single: r5c6=3
Full House: r5c5=6
Naked Single: r3c6=9
Full House: r3c5=3
Full House: r4c6=2
Naked Single: r6c5=9
Full House: r4c5=5
Naked Single: r4c8=3
Full House: r4c2=9
Full House: r6c2=3
Full House: r6c8=2
|
sudoku_normal_extremely_hard_91
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.5...7..3..7.4.2..1..6...8...61......2.....5......86...7...4..9..3.2.4..8..9...1.
|
659287143387541296142639587496152738728463951531798624275314869913826475864975312
|
. 5 . . . 7 . . 3
. . 7 . 4 . 2 . .
1 . . 6 . . . 8 .
. . 6 1 . . . . .
. 2 . . . . . 5 .
. . . . . 8 6 . .
. 7 . . . 4 . . 9
. . 3 . 2 . 4 . .
8 . . 9 . . . 1 .
|
6 5 9 2 8 7 1 4 3
3 8 7 5 4 1 2 9 6
1 4 2 6 3 9 5 8 7
4 9 6 1 5 2 7 3 8
7 2 8 4 6 3 9 5 1
5 3 1 7 9 8 6 2 4
2 7 5 3 1 4 8 6 9
9 1 3 8 2 6 4 7 5
8 6 4 9 7 5 3 1 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2202h2
|
659287143387541296142639587496152738728463951531798624275314869913826475864975312 #1 Hard (438)
Hidden Pair: 1,8 in r17c5 => r1c5<>9, r7c5<>3, r7c5<>5, r7c5<>6
X-Wing: 6 r17 c18 => r2c18,r8c18<>6
Naked Single: r2c8=9
Naked Single: r8c8=7
Naked Single: r1c7=1
Naked Single: r2c1=3
Naked Single: r1c5=8
Naked Single: r1c4=2
Naked Single: r2c4=5
Naked Single: r7c5=1
Naked Single: r2c6=1
Naked Single: r2c9=6
Full House: r2c2=8
Naked Single: r8c4=8
Naked Single: r1c8=4
Naked Single: r7c4=3
Naked Single: r8c9=5
Naked Single: r1c3=9
Full House: r1c1=6
Naked Single: r3c9=7
Full House: r3c7=5
Naked Single: r7c7=8
Naked Single: r8c1=9
Naked Single: r8c6=6
Full House: r8c2=1
Naked Single: r9c7=3
Naked Single: r9c9=2
Full House: r7c8=6
Naked Single: r3c2=4
Full House: r3c3=2
Naked Single: r9c6=5
Full House: r9c5=7
Naked Single: r9c2=6
Full House: r9c3=4
Naked Single: r7c3=5
Full House: r7c1=2
Naked Single: r6c3=1
Full House: r5c3=8
Naked Single: r6c9=4
Naked Single: r4c9=8
Full House: r5c9=1
Naked Single: r6c4=7
Full House: r5c4=4
Naked Single: r6c1=5
Naked Single: r5c1=7
Full House: r4c1=4
Naked Single: r5c7=9
Full House: r4c7=7
Naked Single: r5c6=3
Full House: r5c5=6
Naked Single: r3c6=9
Full House: r3c5=3
Full House: r4c6=2
Naked Single: r6c5=9
Full House: r4c5=5
Naked Single: r4c8=3
Full House: r4c2=9
Full House: r6c2=3
Full House: r6c8=2
|
sudoku_normal_hard_92
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.68.5...45126.4.7.74.2..1...37..6.12.85...9..62.3...87..4..96.1.968...4.2..46.7..
|
968157324512634879743298156437986512185742963629315487874529631396871245251463798
|
. 6 8 . 5 . . . 4
5 1 2 6 . 4 . 7 .
7 4 . 2 . . 1 . .
. 3 7 . . 6 . 1 2
. 8 5 . . . 9 . .
6 2 . 3 . . . 8 7
. . 4 . . 9 6 . 1
. 9 6 8 . . . 4 .
2 . . 4 6 . 7 . .
|
9 6 8 1 5 7 3 2 4
5 1 2 6 3 4 8 7 9
7 4 3 2 9 8 1 5 6
4 3 7 9 8 6 5 1 2
1 8 5 7 4 2 9 6 3
6 2 9 3 1 5 4 8 7
8 7 4 5 2 9 6 3 1
3 9 6 8 7 1 2 4 5
2 5 1 4 6 3 7 9 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1810h
|
968157324512634879743298156437986512185742963629315487874529631396871245251463798 #1 Medium (340)
Hidden Single: r3c2=4
Hidden Single: r9c4=4
Hidden Single: r2c1=5
Locked Pair: 4,5 in r46c7 => r4c8,r6c9,r78c7<>5
Naked Single: r4c8=1
Naked Single: r6c9=7
Naked Single: r6c2=2
Naked Single: r1c2=6
Hidden Single: r2c3=2
Hidden Single: r2c4=6
Hidden Single: r8c3=6
Hidden Single: r7c7=6
Hidden Single: r4c3=7
Naked Single: r5c2=8
Naked Single: r9c2=5
Full House: r7c2=7
Naked Single: r7c4=5
Naked Single: r4c4=9
Naked Single: r4c1=4
Naked Single: r4c5=8
Full House: r4c7=5
Naked Single: r5c1=1
Full House: r6c3=9
Naked Single: r6c7=4
Naked Single: r5c4=7
Full House: r1c4=1
Naked Single: r8c1=3
Naked Single: r3c3=3
Full House: r1c1=9
Full House: r7c1=8
Full House: r9c3=1
Naked Single: r6c5=1
Full House: r6c6=5
Naked Single: r5c6=2
Full House: r5c5=4
Naked Single: r8c7=2
Naked Single: r8c9=5
Naked Single: r3c5=9
Naked Single: r3c6=8
Naked Single: r9c6=3
Naked Single: r1c7=3
Full House: r2c7=8
Naked Single: r7c8=3
Full House: r7c5=2
Naked Single: r8c5=7
Full House: r2c5=3
Full House: r1c6=7
Full House: r1c8=2
Full House: r2c9=9
Full House: r8c6=1
Naked Single: r3c9=6
Full House: r3c8=5
Naked Single: r9c8=9
Full House: r5c8=6
Full House: r9c9=8
Full House: r5c9=3
|
sudoku_normal_extremely_hard_92
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..8.5...4.1...4.7.7..2..1...3...6..2..5...9..6..3...8...4..9..1.9.8...4.2...6.7..
|
968157324512634879743298156437986512185742963629315487874529631396871245251463798
|
. . 8 . 5 . . . 4
. 1 . . . 4 . 7 .
7 . . 2 . . 1 . .
. 3 . . . 6 . . 2
. . 5 . . . 9 . .
6 . . 3 . . . 8 .
. . 4 . . 9 . . 1
. 9 . 8 . . . 4 .
2 . . . 6 . 7 . .
|
9 6 8 1 5 7 3 2 4
5 1 2 6 3 4 8 7 9
7 4 3 2 9 8 1 5 6
4 3 7 9 8 6 5 1 2
1 8 5 7 4 2 9 6 3
6 2 9 3 1 5 4 8 7
8 7 4 5 2 9 6 3 1
3 9 6 8 7 1 2 4 5
2 5 1 4 6 3 7 9 8
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk1810h
|
968157324512634879743298156437986512185742963629315487874529631396871245251463798 #1 Medium (340)
Hidden Single: r3c2=4
Hidden Single: r9c4=4
Hidden Single: r2c1=5
Locked Pair: 4,5 in r46c7 => r4c8,r6c9,r78c7<>5
Naked Single: r4c8=1
Naked Single: r6c9=7
Naked Single: r6c2=2
Naked Single: r1c2=6
Hidden Single: r2c3=2
Hidden Single: r2c4=6
Hidden Single: r8c3=6
Hidden Single: r7c7=6
Hidden Single: r4c3=7
Naked Single: r5c2=8
Naked Single: r9c2=5
Full House: r7c2=7
Naked Single: r7c4=5
Naked Single: r4c4=9
Naked Single: r4c1=4
Naked Single: r4c5=8
Full House: r4c7=5
Naked Single: r5c1=1
Full House: r6c3=9
Naked Single: r6c7=4
Naked Single: r5c4=7
Full House: r1c4=1
Naked Single: r8c1=3
Naked Single: r3c3=3
Full House: r1c1=9
Full House: r7c1=8
Full House: r9c3=1
Naked Single: r6c5=1
Full House: r6c6=5
Naked Single: r5c6=2
Full House: r5c5=4
Naked Single: r8c7=2
Naked Single: r8c9=5
Naked Single: r3c5=9
Naked Single: r3c6=8
Naked Single: r9c6=3
Naked Single: r1c7=3
Full House: r2c7=8
Naked Single: r7c8=3
Full House: r7c5=2
Naked Single: r8c5=7
Full House: r2c5=3
Full House: r1c6=7
Full House: r1c8=2
Full House: r2c9=9
Full House: r8c6=1
Naked Single: r3c9=6
Full House: r3c8=5
Naked Single: r9c8=9
Full House: r5c8=6
Full House: r9c9=8
Full House: r5c9=3
|
sudoku_normal_hard_93
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
42......55....14....7.4..6..8.976...1.9.5...2...182.9..91.3.8..854719623673.2..1.
|
426897135538261479917345268382976541169453782745182396291634857854719623673528914
|
4 2 . . . . . . 5
5 . . . . 1 4 . .
. . 7 . 4 . . 6 .
. 8 . 9 7 6 . . .
1 . 9 . 5 . . . 2
. . . 1 8 2 . 9 .
. 9 1 . 3 . 8 . .
8 5 4 7 1 9 6 2 3
6 7 3 . 2 . . 1 .
|
4 2 6 8 9 7 1 3 5
5 3 8 2 6 1 4 7 9
9 1 7 3 4 5 2 6 8
3 8 2 9 7 6 5 4 1
1 6 9 4 5 3 7 8 2
7 4 5 1 8 2 3 9 6
2 9 1 6 3 4 8 5 7
8 5 4 7 1 9 6 2 3
6 7 3 5 2 8 9 1 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2205e
|
426897135538261479917345268382976541169453782745182396291634857854719623673528914 #1 Easy (284)
Naked Single: r4c5=7
Naked Single: r6c5=8
Hidden Single: r5c3=9
Hidden Single: r1c1=4
Hidden Single: r7c3=1
Naked Single: r8c2=5
Naked Single: r8c8=2
Naked Single: r8c1=8
Naked Single: r8c6=9
Naked Single: r8c7=6
Full House: r8c5=1
Naked Single: r9c5=2
Naked Single: r9c3=3
Naked Single: r9c2=7
Full House: r7c1=2
Naked Single: r4c1=3
Naked Single: r3c1=9
Full House: r6c1=7
Hidden Single: r1c6=7
Hidden Single: r5c8=8
Naked Single: r1c8=3
Naked Single: r2c8=7
Hidden Single: r1c7=1
Naked Single: r3c7=2
Naked Single: r3c9=8
Full House: r2c9=9
Naked Single: r4c7=5
Naked Single: r2c5=6
Full House: r1c5=9
Naked Single: r9c9=4
Naked Single: r4c3=2
Naked Single: r4c8=4
Full House: r4c9=1
Full House: r7c8=5
Naked Single: r6c7=3
Naked Single: r9c7=9
Full House: r7c9=7
Full House: r6c9=6
Full House: r5c7=7
Naked Single: r1c4=8
Full House: r1c3=6
Naked Single: r2c2=3
Naked Single: r2c3=8
Full House: r6c3=5
Full House: r6c2=4
Full House: r2c4=2
Full House: r3c2=1
Full House: r5c2=6
Naked Single: r7c6=4
Full House: r7c4=6
Naked Single: r9c4=5
Full House: r9c6=8
Naked Single: r5c6=3
Full House: r3c6=5
Full House: r3c4=3
Full House: r5c4=4
|
sudoku_normal_extremely_hard_93
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.2......55....14....7.4..6..8.9.6...1...5...2...1.2.9..9..3.8....47....36......1.
|
426897135538261479917345268382976541169453782745182396291634857854719623673528914
|
. 2 . . . . . . 5
5 . . . . 1 4 . .
. . 7 . 4 . . 6 .
. 8 . 9 . 6 . . .
1 . . . 5 . . . 2
. . . 1 . 2 . 9 .
. 9 . . 3 . 8 . .
. . 4 7 . . . . 3
6 . . . . . . 1 .
|
4 2 6 8 9 7 1 3 5
5 3 8 2 6 1 4 7 9
9 1 7 3 4 5 2 6 8
3 8 2 9 7 6 5 4 1
1 6 9 4 5 3 7 8 2
7 4 5 1 8 2 3 9 6
2 9 1 6 3 4 8 5 7
8 5 4 7 1 9 6 2 3
6 7 3 5 2 8 9 1 4
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2205e
|
426897135538261479917345268382976541169453782745182396291634857854719623673528914 #1 Easy (284)
Naked Single: r4c5=7
Naked Single: r6c5=8
Hidden Single: r5c3=9
Hidden Single: r1c1=4
Hidden Single: r7c3=1
Naked Single: r8c2=5
Naked Single: r8c8=2
Naked Single: r8c1=8
Naked Single: r8c6=9
Naked Single: r8c7=6
Full House: r8c5=1
Naked Single: r9c5=2
Naked Single: r9c3=3
Naked Single: r9c2=7
Full House: r7c1=2
Naked Single: r4c1=3
Naked Single: r3c1=9
Full House: r6c1=7
Hidden Single: r1c6=7
Hidden Single: r5c8=8
Naked Single: r1c8=3
Naked Single: r2c8=7
Hidden Single: r1c7=1
Naked Single: r3c7=2
Naked Single: r3c9=8
Full House: r2c9=9
Naked Single: r4c7=5
Naked Single: r2c5=6
Full House: r1c5=9
Naked Single: r9c9=4
Naked Single: r4c3=2
Naked Single: r4c8=4
Full House: r4c9=1
Full House: r7c8=5
Naked Single: r6c7=3
Naked Single: r9c7=9
Full House: r7c9=7
Full House: r6c9=6
Full House: r5c7=7
Naked Single: r1c4=8
Full House: r1c3=6
Naked Single: r2c2=3
Naked Single: r2c3=8
Full House: r6c3=5
Full House: r6c2=4
Full House: r2c4=2
Full House: r3c2=1
Full House: r5c2=6
Naked Single: r7c6=4
Full House: r7c4=6
Naked Single: r9c4=5
Full House: r9c6=8
Naked Single: r5c6=3
Full House: r3c6=5
Full House: r3c4=3
Full House: r5c4=4
|
sudoku_normal_hard_94
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..1.8..2...2..1....7..29.14.295.81.68...6.2.9..69.2.4.3..4...62...2..4..294836751
|
961784325482351697573629814729548136845163279136972548358417962617295483294836751
|
. . 1 . 8 . . 2 .
. . 2 . . 1 . . .
. 7 . . 2 9 . 1 4
. 2 9 5 . 8 1 . 6
8 . . . 6 . 2 . 9
. . 6 9 . 2 . 4 .
3 . . 4 . . . 6 2
. . . 2 . . 4 . .
2 9 4 8 3 6 7 5 1
|
9 6 1 7 8 4 3 2 5
4 8 2 3 5 1 6 9 7
5 7 3 6 2 9 8 1 4
7 2 9 5 4 8 1 3 6
8 4 5 1 6 3 2 7 9
1 3 6 9 7 2 5 4 8
3 5 8 4 1 7 9 6 2
6 1 7 2 9 5 4 8 3
2 9 4 8 3 6 7 5 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2207m
|
961784325482351697573629814729548136845163279136972548358417962617295483294836751 #1 Easy (364)
Hidden Single: r3c8=1
Hidden Single: r5c7=2
Hidden Single: r4c9=6
Hidden Single: r3c5=2
Hidden Single: r9c1=2
Hidden Single: r4c3=9
Hidden Single: r6c4=9
Hidden Single: r7c9=2
Hidden Single: r9c3=4
Hidden Single: r9c4=8
Naked Single: r9c8=5
Naked Single: r9c6=6
Full House: r9c9=1
Hidden Single: r4c6=8
Hidden Single: r5c4=1
Naked Single: r6c5=7
Naked Single: r4c5=4
Full House: r5c6=3
Naked Single: r2c5=5
Naked Single: r4c1=7
Full House: r4c8=3
Naked Single: r5c8=7
Naked Single: r5c3=5
Full House: r5c2=4
Naked Single: r6c1=1
Full House: r6c2=3
Hidden Single: r1c6=4
Hidden Single: r3c3=3
Naked Single: r3c4=6
Naked Single: r3c1=5
Full House: r3c7=8
Naked Single: r1c2=6
Naked Single: r8c1=6
Naked Single: r2c8=9
Full House: r8c8=8
Naked Single: r6c7=5
Full House: r6c9=8
Naked Single: r7c7=9
Full House: r8c9=3
Naked Single: r1c1=9
Full House: r2c1=4
Full House: r2c2=8
Naked Single: r8c3=7
Full House: r7c3=8
Naked Single: r1c7=3
Full House: r2c7=6
Naked Single: r7c5=1
Full House: r8c5=9
Naked Single: r2c9=7
Full House: r1c9=5
Full House: r1c4=7
Full House: r2c4=3
Naked Single: r8c6=5
Full House: r7c6=7
Full House: r7c2=5
Full House: r8c2=1
|
sudoku_normal_extremely_hard_94
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..1.8..2...2..1....7...9..4.2.5..1..8...6...9..6..2.4.3..4...6....2..4...9..3.7..
|
961784325482351697573629814729548136845163279136972548358417962617295483294836751
|
. . 1 . 8 . . 2 .
. . 2 . . 1 . . .
. 7 . . . 9 . . 4
. 2 . 5 . . 1 . .
8 . . . 6 . . . 9
. . 6 . . 2 . 4 .
3 . . 4 . . . 6 .
. . . 2 . . 4 . .
. 9 . . 3 . 7 . .
|
9 6 1 7 8 4 3 2 5
4 8 2 3 5 1 6 9 7
5 7 3 6 2 9 8 1 4
7 2 9 5 4 8 1 3 6
8 4 5 1 6 3 2 7 9
1 3 6 9 7 2 5 4 8
3 5 8 4 1 7 9 6 2
6 1 7 2 9 5 4 8 3
2 9 4 8 3 6 7 5 1
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2207m
|
961784325482351697573629814729548136845163279136972548358417962617295483294836751 #1 Easy (364)
Hidden Single: r3c8=1
Hidden Single: r5c7=2
Hidden Single: r4c9=6
Hidden Single: r3c5=2
Hidden Single: r9c1=2
Hidden Single: r4c3=9
Hidden Single: r6c4=9
Hidden Single: r7c9=2
Hidden Single: r9c3=4
Hidden Single: r9c4=8
Naked Single: r9c8=5
Naked Single: r9c6=6
Full House: r9c9=1
Hidden Single: r4c6=8
Hidden Single: r5c4=1
Naked Single: r6c5=7
Naked Single: r4c5=4
Full House: r5c6=3
Naked Single: r2c5=5
Naked Single: r4c1=7
Full House: r4c8=3
Naked Single: r5c8=7
Naked Single: r5c3=5
Full House: r5c2=4
Naked Single: r6c1=1
Full House: r6c2=3
Hidden Single: r1c6=4
Hidden Single: r3c3=3
Naked Single: r3c4=6
Naked Single: r3c1=5
Full House: r3c7=8
Naked Single: r1c2=6
Naked Single: r8c1=6
Naked Single: r2c8=9
Full House: r8c8=8
Naked Single: r6c7=5
Full House: r6c9=8
Naked Single: r7c7=9
Full House: r8c9=3
Naked Single: r1c1=9
Full House: r2c1=4
Full House: r2c2=8
Naked Single: r8c3=7
Full House: r7c3=8
Naked Single: r1c7=3
Full House: r2c7=6
Naked Single: r7c5=1
Full House: r8c5=9
Naked Single: r2c9=7
Full House: r1c9=5
Full House: r1c4=7
Full House: r2c4=3
Naked Single: r8c6=5
Full House: r7c6=7
Full House: r7c2=5
Full House: r8c2=1
|
sudoku_normal_hard_95
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
3....8.71...16.4.9.1.5.....4...891.7.7..15.4...26....3.....18656.8.5..14.518.6..2
|
396428571527163489814597236465389127973215648182674953249731865638952714751846392
|
3 . . . . 8 . 7 1
. . . 1 6 . 4 . 9
. 1 . 5 . . . . .
4 . . . 8 9 1 . 7
. 7 . . 1 5 . 4 .
. . 2 6 . . . . 3
. . . . . 1 8 6 5
6 . 8 . 5 . . 1 4
. 5 1 8 . 6 . . 2
|
3 9 6 4 2 8 5 7 1
5 2 7 1 6 3 4 8 9
8 1 4 5 9 7 2 3 6
4 6 5 3 8 9 1 2 7
9 7 3 2 1 5 6 4 8
1 8 2 6 7 4 9 5 3
2 4 9 7 3 1 8 6 5
6 3 8 9 5 2 7 1 4
7 5 1 8 4 6 3 9 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304h1
|
396428571527163489814597236465389127973215648182674953249731865638952714751846392 #1 Medium (528)
Hidden Single: r9c6=6
Locked Candidates Type 1 (Pointing): 1 in b7 => r9c8<>1
Naked Triple: 3,7,9 in r89c7,r9c8 => r7c7,r8c8<>3, r7c79,r8c9<>7, r7c7,r8c8<>9
Naked Single: r8c8=1
Naked Single: r8c9=4
Hidden Single: r4c9=7
Hidden Single: r2c4=1
Hidden Single: r1c9=1
Locked Pair: 2,3 in r45c4 => r178c4,r45c5,r5c6<>2, r45c5,r5c6,r78c4<>3
Naked Single: r4c5=8
Naked Single: r5c6=5
Naked Single: r5c5=1
Hidden Single: r7c9=5
Naked Single: r7c7=8
Hidden Single: r9c3=1
Hidden Single: r6c1=1
Hidden Single: r9c5=4
Naked Single: r6c5=7
Naked Single: r6c6=4
Hidden Single: r2c1=5
Naked Single: r2c3=7
Hidden Single: r4c3=5
Naked Single: r4c8=2
Naked Single: r4c4=3
Full House: r4c2=6
Full House: r5c4=2
Hidden Single: r1c4=4
Hidden Single: r3c3=4
Hidden Single: r1c7=5
Naked Single: r6c7=9
Naked Single: r5c7=6
Naked Single: r6c2=8
Full House: r6c8=5
Full House: r5c9=8
Full House: r3c9=6
Naked Single: r2c2=2
Naked Single: r5c1=9
Full House: r5c3=3
Naked Single: r1c2=9
Naked Single: r2c6=3
Full House: r2c8=8
Naked Single: r3c1=8
Full House: r1c3=6
Full House: r7c3=9
Full House: r1c5=2
Naked Single: r9c1=7
Full House: r7c1=2
Naked Single: r8c2=3
Full House: r7c2=4
Naked Single: r3c8=3
Full House: r3c7=2
Full House: r9c8=9
Full House: r9c7=3
Full House: r8c7=7
Naked Single: r7c4=7
Full House: r7c5=3
Full House: r3c5=9
Full House: r3c6=7
Full House: r8c4=9
Full House: r8c6=2
|
sudoku_normal_extremely_hard_95
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
3....8.7.....6.4.9.1.5.....4....91...7.....4...26....3.....1.6.6.8.5.....5.8....2
|
396428571527163489814597236465389127973215648182674953249731865638952714751846392
|
3 . . . . 8 . 7 .
. . . . 6 . 4 . 9
. 1 . 5 . . . . .
4 . . . . 9 1 . .
. 7 . . . . . 4 .
. . 2 6 . . . . 3
. . . . . 1 . 6 .
6 . 8 . 5 . . . .
. 5 . 8 . . . . 2
|
3 9 6 4 2 8 5 7 1
5 2 7 1 6 3 4 8 9
8 1 4 5 9 7 2 3 6
4 6 5 3 8 9 1 2 7
9 7 3 2 1 5 6 4 8
1 8 2 6 7 4 9 5 3
2 4 9 7 3 1 8 6 5
6 3 8 9 5 2 7 1 4
7 5 1 8 4 6 3 9 2
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2304h1
|
396428571527163489814597236465389127973215648182674953249731865638952714751846392 #1 Medium (528)
Hidden Single: r9c6=6
Locked Candidates Type 1 (Pointing): 1 in b7 => r9c8<>1
Naked Triple: 3,7,9 in r89c7,r9c8 => r7c7,r8c8<>3, r7c79,r8c9<>7, r7c7,r8c8<>9
Naked Single: r8c8=1
Naked Single: r8c9=4
Hidden Single: r4c9=7
Hidden Single: r2c4=1
Hidden Single: r1c9=1
Locked Pair: 2,3 in r45c4 => r178c4,r45c5,r5c6<>2, r45c5,r5c6,r78c4<>3
Naked Single: r4c5=8
Naked Single: r5c6=5
Naked Single: r5c5=1
Hidden Single: r7c9=5
Naked Single: r7c7=8
Hidden Single: r9c3=1
Hidden Single: r6c1=1
Hidden Single: r9c5=4
Naked Single: r6c5=7
Naked Single: r6c6=4
Hidden Single: r2c1=5
Naked Single: r2c3=7
Hidden Single: r4c3=5
Naked Single: r4c8=2
Naked Single: r4c4=3
Full House: r4c2=6
Full House: r5c4=2
Hidden Single: r1c4=4
Hidden Single: r3c3=4
Hidden Single: r1c7=5
Naked Single: r6c7=9
Naked Single: r5c7=6
Naked Single: r6c2=8
Full House: r6c8=5
Full House: r5c9=8
Full House: r3c9=6
Naked Single: r2c2=2
Naked Single: r5c1=9
Full House: r5c3=3
Naked Single: r1c2=9
Naked Single: r2c6=3
Full House: r2c8=8
Naked Single: r3c1=8
Full House: r1c3=6
Full House: r7c3=9
Full House: r1c5=2
Naked Single: r9c1=7
Full House: r7c1=2
Naked Single: r8c2=3
Full House: r7c2=4
Naked Single: r3c8=3
Full House: r3c7=2
Full House: r9c8=9
Full House: r9c7=3
Full House: r8c7=7
Naked Single: r7c4=7
Full House: r7c5=3
Full House: r3c5=9
Full House: r3c6=7
Full House: r8c4=9
Full House: r8c6=2
|
sudoku_normal_hard_96
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
32.9.6741...7..3921.9.3.685.4.8.3..9..3...5..7....5.23.5.32.4.6.31..9.5.6..5...3.
|
328956741564781392179432685245863179813297564796145823957328416431679258682514937
|
3 2 . 9 . 6 7 4 1
. . . 7 . . 3 9 2
1 . 9 . 3 . 6 8 5
. 4 . 8 . 3 . . 9
. . 3 . . . 5 . .
7 . . . . 5 . 2 3
. 5 . 3 2 . 4 . 6
. 3 1 . . 9 . 5 .
6 . . 5 . . . 3 .
|
3 2 8 9 5 6 7 4 1
5 6 4 7 8 1 3 9 2
1 7 9 4 3 2 6 8 5
2 4 5 8 6 3 1 7 9
8 1 3 2 9 7 5 6 4
7 9 6 1 4 5 8 2 3
9 5 7 3 2 8 4 1 6
4 3 1 6 7 9 2 5 8
6 8 2 5 1 4 9 3 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2306h2
|
328956741564781392179432685245863179813297564796145823957328416431679258682514937 #1 Medium (330)
Hidden Single: r1c1=3
Hidden Single: r3c9=5
Hidden Single: r4c6=3
Hidden Single: r6c9=3
Hidden Single: r8c2=3
Hidden Single: r8c8=5
Hidden Single: r7c4=3
Locked Pair: 2,4 in r3c46 => r2c6,r3c7<>2, r1c45,r2c56<>4
Naked Single: r1c4=9
Naked Single: r1c7=7
Naked Single: r1c8=4
Naked Single: r3c7=6
Naked Single: r2c9=2
Full House: r2c8=9
Naked Single: r3c2=7
Naked Single: r4c7=1
Naked Single: r6c7=8
Naked Single: r6c3=6
Naked Single: r8c7=2
Full House: r9c7=9
Naked Single: r9c2=8
Naked Single: r2c2=6
Naked Single: r7c1=9
Naked Single: r7c3=7
Naked Single: r8c1=4
Full House: r9c3=2
Naked Single: r9c9=7
Naked Single: r7c8=1
Full House: r8c9=8
Full House: r5c9=4
Full House: r7c6=8
Naked Single: r8c4=6
Full House: r8c5=7
Naked Single: r4c3=5
Naked Single: r2c6=1
Naked Single: r4c5=6
Naked Single: r1c3=8
Full House: r1c5=5
Full House: r2c3=4
Full House: r2c1=5
Full House: r2c5=8
Naked Single: r4c1=2
Full House: r4c8=7
Full House: r5c1=8
Full House: r5c8=6
Naked Single: r9c6=4
Full House: r9c5=1
Naked Single: r3c6=2
Full House: r3c4=4
Full House: r5c6=7
Naked Single: r5c5=9
Full House: r6c5=4
Naked Single: r6c4=1
Full House: r5c4=2
Full House: r5c2=1
Full House: r6c2=9
|
sudoku_normal_extremely_hard_96
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.2...6..1...7..3..1.9.3..8..4.8....9..3...5..7....5.2..5..2.4.6..1..9...6..5...3.
|
328956741564781392179432685245863179813297564796145823957328416431679258682514937
|
. 2 . . . 6 . . 1
. . . 7 . . 3 . .
1 . 9 . 3 . . 8 .
. 4 . 8 . . . . 9
. . 3 . . . 5 . .
7 . . . . 5 . 2 .
. 5 . . 2 . 4 . 6
. . 1 . . 9 . . .
6 . . 5 . . . 3 .
|
3 2 8 9 5 6 7 4 1
5 6 4 7 8 1 3 9 2
1 7 9 4 3 2 6 8 5
2 4 5 8 6 3 1 7 9
8 1 3 2 9 7 5 6 4
7 9 6 1 4 5 8 2 3
9 5 7 3 2 8 4 1 6
4 3 1 6 7 9 2 5 8
6 8 2 5 1 4 9 3 7
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2306h2
|
328956741564781392179432685245863179813297564796145823957328416431679258682514937 #1 Medium (330)
Hidden Single: r1c1=3
Hidden Single: r3c9=5
Hidden Single: r4c6=3
Hidden Single: r6c9=3
Hidden Single: r8c2=3
Hidden Single: r8c8=5
Hidden Single: r7c4=3
Locked Pair: 2,4 in r3c46 => r2c6,r3c7<>2, r1c45,r2c56<>4
Naked Single: r1c4=9
Naked Single: r1c7=7
Naked Single: r1c8=4
Naked Single: r3c7=6
Naked Single: r2c9=2
Full House: r2c8=9
Naked Single: r3c2=7
Naked Single: r4c7=1
Naked Single: r6c7=8
Naked Single: r6c3=6
Naked Single: r8c7=2
Full House: r9c7=9
Naked Single: r9c2=8
Naked Single: r2c2=6
Naked Single: r7c1=9
Naked Single: r7c3=7
Naked Single: r8c1=4
Full House: r9c3=2
Naked Single: r9c9=7
Naked Single: r7c8=1
Full House: r8c9=8
Full House: r5c9=4
Full House: r7c6=8
Naked Single: r8c4=6
Full House: r8c5=7
Naked Single: r4c3=5
Naked Single: r2c6=1
Naked Single: r4c5=6
Naked Single: r1c3=8
Full House: r1c5=5
Full House: r2c3=4
Full House: r2c1=5
Full House: r2c5=8
Naked Single: r4c1=2
Full House: r4c8=7
Full House: r5c1=8
Full House: r5c8=6
Naked Single: r9c6=4
Full House: r9c5=1
Naked Single: r3c6=2
Full House: r3c4=4
Full House: r5c6=7
Naked Single: r5c5=9
Full House: r6c5=4
Naked Single: r6c4=1
Full House: r5c4=2
Full House: r5c2=1
Full House: r6c2=9
|
sudoku_normal_hard_97
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9..4.2.73..278.59..7..1.24...6.3791..3..5.76..1.6.98......7.38..6....4.77..3.4..9
|
958462173142783596673915248426837915839251764517649832294576381365198427781324659
|
9 . . 4 . 2 . 7 3
. . 2 7 8 . 5 9 .
. 7 . . 1 . 2 4 .
. . 6 . 3 7 9 1 .
. 3 . . 5 . 7 6 .
. 1 . 6 . 9 8 . .
. . . . 7 . 3 8 .
. 6 . . . . 4 . 7
7 . . 3 . 4 . . 9
|
9 5 8 4 6 2 1 7 3
1 4 2 7 8 3 5 9 6
6 7 3 9 1 5 2 4 8
4 2 6 8 3 7 9 1 5
8 3 9 2 5 1 7 6 4
5 1 7 6 4 9 8 3 2
2 9 4 5 7 6 3 8 1
3 6 5 1 9 8 4 2 7
7 8 1 3 2 4 6 5 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2007h2
|
958462173142783596673915248426837915839251764517649832294576381365198427781324659 #1 Hard (534)
Hidden Single: r2c4=7
X-Wing: 1 r19 c37 => r27c7,r78c3<>1
X-Wing: 6 r19 c57 => r2c57,r37c7<>6
Naked Single: r2c7=5
Naked Single: r1c8=7
Naked Single: r3c7=2
Naked Single: r3c8=4
Naked Single: r7c7=3
Naked Single: r4c7=9
Naked Single: r5c7=7
Hidden Single: r8c9=7
Hidden Single: r4c5=3
Naked Single: r2c5=8
Naked Single: r6c6=9
Naked Single: r1c5=6
Naked Single: r2c2=4
Naked Single: r1c7=1
Full House: r9c7=6
Naked Single: r2c6=3
Naked Single: r9c5=2
Naked Single: r2c9=6
Full House: r2c1=1
Full House: r3c9=8
Naked Single: r3c6=5
Full House: r3c4=9
Naked Single: r6c5=4
Full House: r8c5=9
Naked Single: r9c8=5
Naked Single: r3c3=3
Full House: r3c1=6
Naked Single: r8c8=2
Full House: r6c8=3
Full House: r7c9=1
Naked Single: r9c2=8
Full House: r9c3=1
Naked Single: r7c4=5
Naked Single: r7c6=6
Naked Single: r1c2=5
Full House: r1c3=8
Naked Single: r8c3=5
Naked Single: r4c2=2
Full House: r7c2=9
Naked Single: r6c3=7
Naked Single: r8c1=3
Naked Single: r4c4=8
Naked Single: r6c1=5
Full House: r6c9=2
Naked Single: r7c3=4
Full House: r5c3=9
Full House: r7c1=2
Naked Single: r5c6=1
Full House: r5c4=2
Full House: r8c4=1
Full House: r8c6=8
Naked Single: r4c1=4
Full House: r4c9=5
Full House: r5c9=4
Full House: r5c1=8
|
sudoku_normal_extremely_hard_97
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
9..4.2..3..2....9..7..1......6..7.1..3..5..6..1.6..8......7..8..6....4..7..3.4..9
|
958462173142783596673915248426837915839251764517649832294576381365198427781324659
|
9 . . 4 . 2 . . 3
. . 2 . . . . 9 .
. 7 . . 1 . . . .
. . 6 . . 7 . 1 .
. 3 . . 5 . . 6 .
. 1 . 6 . . 8 . .
. . . . 7 . . 8 .
. 6 . . . . 4 . .
7 . . 3 . 4 . . 9
|
9 5 8 4 6 2 1 7 3
1 4 2 7 8 3 5 9 6
6 7 3 9 1 5 2 4 8
4 2 6 8 3 7 9 1 5
8 3 9 2 5 1 7 6 4
5 1 7 6 4 9 8 3 2
2 9 4 5 7 6 3 8 1
3 6 5 1 9 8 4 2 7
7 8 1 3 2 4 6 5 9
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2007h2
|
958462173142783596673915248426837915839251764517649832294576381365198427781324659 #1 Hard (534)
Hidden Single: r2c4=7
X-Wing: 1 r19 c37 => r27c7,r78c3<>1
X-Wing: 6 r19 c57 => r2c57,r37c7<>6
Naked Single: r2c7=5
Naked Single: r1c8=7
Naked Single: r3c7=2
Naked Single: r3c8=4
Naked Single: r7c7=3
Naked Single: r4c7=9
Naked Single: r5c7=7
Hidden Single: r8c9=7
Hidden Single: r4c5=3
Naked Single: r2c5=8
Naked Single: r6c6=9
Naked Single: r1c5=6
Naked Single: r2c2=4
Naked Single: r1c7=1
Full House: r9c7=6
Naked Single: r2c6=3
Naked Single: r9c5=2
Naked Single: r2c9=6
Full House: r2c1=1
Full House: r3c9=8
Naked Single: r3c6=5
Full House: r3c4=9
Naked Single: r6c5=4
Full House: r8c5=9
Naked Single: r9c8=5
Naked Single: r3c3=3
Full House: r3c1=6
Naked Single: r8c8=2
Full House: r6c8=3
Full House: r7c9=1
Naked Single: r9c2=8
Full House: r9c3=1
Naked Single: r7c4=5
Naked Single: r7c6=6
Naked Single: r1c2=5
Full House: r1c3=8
Naked Single: r8c3=5
Naked Single: r4c2=2
Full House: r7c2=9
Naked Single: r6c3=7
Naked Single: r8c1=3
Naked Single: r4c4=8
Naked Single: r6c1=5
Full House: r6c9=2
Naked Single: r7c3=4
Full House: r5c3=9
Full House: r7c1=2
Naked Single: r5c6=1
Full House: r5c4=2
Full House: r8c4=1
Full House: r8c6=8
Naked Single: r4c1=4
Full House: r4c9=5
Full House: r5c9=4
Full House: r5c1=8
|
sudoku_normal_hard_98
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
3.21.48...6.3...1.1..9....3.15..63.9.3..1..4.4..83.5.12..6.3..4.9.....6.648291735
|
372154896569328417184967253815746329937512648426839571251673984793485162648291735
|
3 . 2 1 . 4 8 . .
. 6 . 3 . . . 1 .
1 . . 9 . . . . 3
. 1 5 . . 6 3 . 9
. 3 . . 1 . . 4 .
4 . . 8 3 . 5 . 1
2 . . 6 . 3 . . 4
. 9 . . . . . 6 .
6 4 8 2 9 1 7 3 5
|
3 7 2 1 5 4 8 9 6
5 6 9 3 2 8 4 1 7
1 8 4 9 6 7 2 5 3
8 1 5 7 4 6 3 2 9
9 3 7 5 1 2 6 4 8
4 2 6 8 3 9 5 7 1
2 5 1 6 7 3 9 8 4
7 9 3 4 8 5 1 6 2
6 4 8 2 9 1 7 3 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2401m
|
372154896569328417184967253815746329937512648426839571251673984793485162648291735 #1 Easy (404)
Hidden Single: r1c4=1
Hidden Single: r7c4=6
Hidden Single: r9c1=6
Hidden Single: r9c8=3
Hidden Single: r6c5=3
Hidden Single: r4c7=3
Hidden Single: r1c1=3
Hidden Single: r2c4=3
Hidden Single: r4c2=1
Hidden Single: r6c9=1
Naked Single: r9c9=5
Naked Single: r9c2=4
Naked Single: r9c5=9
Full House: r9c6=1
Hidden Single: r8c3=3
Hidden Single: r1c8=9
Naked Single: r7c8=8
Naked Single: r8c9=2
Naked Single: r2c9=7
Naked Single: r8c7=1
Full House: r7c7=9
Naked Single: r1c9=6
Full House: r5c9=8
Hidden Single: r6c2=2
Naked Single: r6c8=7
Naked Single: r4c8=2
Full House: r3c8=5
Full House: r5c7=6
Naked Single: r6c6=9
Full House: r6c3=6
Hidden Single: r3c2=8
Hidden Single: r7c3=1
Hidden Single: r4c1=8
Hidden Single: r3c5=6
Hidden Single: r5c6=2
Naked Single: r3c6=7
Naked Single: r1c5=5
Full House: r1c2=7
Full House: r7c2=5
Full House: r7c5=7
Full House: r8c1=7
Naked Single: r3c3=4
Full House: r3c7=2
Full House: r2c7=4
Naked Single: r2c6=8
Full House: r2c5=2
Full House: r8c6=5
Naked Single: r4c5=4
Full House: r4c4=7
Full House: r8c5=8
Full House: r8c4=4
Full House: r5c4=5
Naked Single: r5c1=9
Full House: r2c1=5
Full House: r2c3=9
Full House: r5c3=7
|
sudoku_normal_extremely_hard_98
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
..2..48...6.....1.1..9....3..5..6..9.3..1..4.4..8..5..2....3..4.9.....6...82..7..
|
372154896569328417184967253815746329937512648426839571251673984793485162648291735
|
. . 2 . . 4 8 . .
. 6 . . . . . 1 .
1 . . 9 . . . . 3
. . 5 . . 6 . . 9
. 3 . . 1 . . 4 .
4 . . 8 . . 5 . .
2 . . . . 3 . . 4
. 9 . . . . . 6 .
. . 8 2 . . 7 . .
|
3 7 2 1 5 4 8 9 6
5 6 9 3 2 8 4 1 7
1 8 4 9 6 7 2 5 3
8 1 5 7 4 6 3 2 9
9 3 7 5 1 2 6 4 8
4 2 6 8 3 9 5 7 1
2 5 1 6 7 3 9 8 4
7 9 3 4 8 5 1 6 2
6 4 8 2 9 1 7 3 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2401m
|
372154896569328417184967253815746329937512648426839571251673984793485162648291735 #1 Easy (404)
Hidden Single: r1c4=1
Hidden Single: r7c4=6
Hidden Single: r9c1=6
Hidden Single: r9c8=3
Hidden Single: r6c5=3
Hidden Single: r4c7=3
Hidden Single: r1c1=3
Hidden Single: r2c4=3
Hidden Single: r4c2=1
Hidden Single: r6c9=1
Naked Single: r9c9=5
Naked Single: r9c2=4
Naked Single: r9c5=9
Full House: r9c6=1
Hidden Single: r8c3=3
Hidden Single: r1c8=9
Naked Single: r7c8=8
Naked Single: r8c9=2
Naked Single: r2c9=7
Naked Single: r8c7=1
Full House: r7c7=9
Naked Single: r1c9=6
Full House: r5c9=8
Hidden Single: r6c2=2
Naked Single: r6c8=7
Naked Single: r4c8=2
Full House: r3c8=5
Full House: r5c7=6
Naked Single: r6c6=9
Full House: r6c3=6
Hidden Single: r3c2=8
Hidden Single: r7c3=1
Hidden Single: r4c1=8
Hidden Single: r3c5=6
Hidden Single: r5c6=2
Naked Single: r3c6=7
Naked Single: r1c5=5
Full House: r1c2=7
Full House: r7c2=5
Full House: r7c5=7
Full House: r8c1=7
Naked Single: r3c3=4
Full House: r3c7=2
Full House: r2c7=4
Naked Single: r2c6=8
Full House: r2c5=2
Full House: r8c6=5
Naked Single: r4c5=4
Full House: r4c4=7
Full House: r8c5=8
Full House: r8c4=4
Full House: r5c4=5
Naked Single: r5c1=9
Full House: r2c1=5
Full House: r2c3=9
Full House: r5c3=7
|
sudoku_normal_hard_99
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.3..7..2.9.4.567385..8..96..6..1...3..9...1..1...2.67...5..4.1624.1..8...71.9..4.
|
638971524914256738527843961762519483489367152153428679395784216246135897871692345
|
. 3 . . 7 . . 2 .
9 . 4 . 5 6 7 3 8
5 . . 8 . . 9 6 .
. 6 . . 1 . . . 3
. . 9 . . . 1 . .
1 . . . 2 . 6 7 .
. . 5 . . 4 . 1 6
2 4 . 1 . . 8 . .
. 7 1 . 9 . . 4 .
|
6 3 8 9 7 1 5 2 4
9 1 4 2 5 6 7 3 8
5 2 7 8 4 3 9 6 1
7 6 2 5 1 9 4 8 3
4 8 9 3 6 7 1 5 2
1 5 3 4 2 8 6 7 9
3 9 5 7 8 4 2 1 6
2 4 6 1 3 5 8 9 7
8 7 1 6 9 2 3 4 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2101h1
|
638971524914256738527843961762519483489367152153428679395784216246135897871692345 #1 Medium (640)
Hidden Single: r8c2=4
Locked Candidates Type 1 (Pointing): 9 in b7 => r7c8<>9
Hidden Pair: 2,7 in r7c47 => r7c47<>3
Hidden Pair: 2,7 in r34c3 => r3c3<>1, r3c3<>6, r4c3<>8
Hidden Single: r3c8=6
Hidden Single: r6c7=6
Locked Candidates Type 1 (Pointing): 3 in b3 => r2c45<>3
Naked Single: r2c5=5
Naked Pair: 3,6 in r8c35 => r8c68<>3
Hidden Pair: 6,8 in r1c13 => r1c1<>9, r1c3<>1
Hidden Single: r9c3=1
Hidden Single: r7c8=1
Naked Single: r2c8=3
Naked Single: r2c7=7
Naked Single: r2c1=9
Naked Single: r7c7=2
Naked Single: r2c4=2
Full House: r2c2=1
Naked Single: r7c4=7
Naked Single: r9c9=5
Naked Single: r3c2=2
Naked Single: r8c6=5
Naked Single: r8c8=9
Naked Single: r9c7=3
Full House: r8c9=7
Naked Single: r3c3=7
Naked Single: r9c4=6
Naked Single: r4c3=2
Naked Single: r8c5=3
Full House: r8c3=6
Naked Single: r9c1=8
Full House: r9c6=2
Full House: r7c5=8
Naked Single: r3c5=4
Full House: r5c5=6
Naked Single: r1c3=8
Full House: r1c1=6
Full House: r6c3=3
Naked Single: r7c1=3
Full House: r7c2=9
Naked Single: r1c4=9
Naked Single: r3c9=1
Full House: r3c6=3
Full House: r1c6=1
Naked Single: r1c9=4
Full House: r1c7=5
Full House: r4c7=4
Naked Single: r5c9=2
Full House: r6c9=9
Naked Single: r4c1=7
Full House: r5c1=4
Naked Single: r4c4=5
Naked Single: r6c6=8
Naked Single: r4c8=8
Full House: r4c6=9
Full House: r5c6=7
Full House: r5c8=5
Naked Single: r5c4=3
Full House: r6c4=4
Full House: r6c2=5
Full House: r5c2=8
|
sudoku_normal_extremely_hard_99
| 9
| 9
|
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
"
|
None
|
.3..7..2...4..6..85..8..9...6..1...3..9...1..1...2..7...5..4..62..1..8...7..9..4.
|
638971524914256738527843961762519483489367152153428679395784216246135897871692345
|
. 3 . . 7 . . 2 .
. . 4 . . 6 . . 8
5 . . 8 . . 9 . .
. 6 . . 1 . . . 3
. . 9 . . . 1 . .
1 . . . 2 . . 7 .
. . 5 . . 4 . . 6
2 . . 1 . . 8 . .
. 7 . . 9 . . 4 .
|
6 3 8 9 7 1 5 2 4
9 1 4 2 5 6 7 3 8
5 2 7 8 4 3 9 6 1
7 6 2 5 1 9 4 8 3
4 8 9 3 6 7 1 5 2
1 5 3 4 2 8 6 7 9
3 9 5 7 8 4 2 1 6
2 4 6 1 3 5 8 9 7
8 7 1 6 9 2 3 4 5
|
Complete the sudoku board based on the rules and visual elements.
|
Nikoli nhk2101h1
|
638971524914256738527843961762519483489367152153428679395784216246135897871692345 #1 Medium (640)
Hidden Single: r8c2=4
Locked Candidates Type 1 (Pointing): 9 in b7 => r7c8<>9
Hidden Pair: 2,7 in r7c47 => r7c47<>3
Hidden Pair: 2,7 in r34c3 => r3c3<>1, r3c3<>6, r4c3<>8
Hidden Single: r3c8=6
Hidden Single: r6c7=6
Locked Candidates Type 1 (Pointing): 3 in b3 => r2c45<>3
Naked Single: r2c5=5
Naked Pair: 3,6 in r8c35 => r8c68<>3
Hidden Pair: 6,8 in r1c13 => r1c1<>9, r1c3<>1
Hidden Single: r9c3=1
Hidden Single: r7c8=1
Naked Single: r2c8=3
Naked Single: r2c7=7
Naked Single: r2c1=9
Naked Single: r7c7=2
Naked Single: r2c4=2
Full House: r2c2=1
Naked Single: r7c4=7
Naked Single: r9c9=5
Naked Single: r3c2=2
Naked Single: r8c6=5
Naked Single: r8c8=9
Naked Single: r9c7=3
Full House: r8c9=7
Naked Single: r3c3=7
Naked Single: r9c4=6
Naked Single: r4c3=2
Naked Single: r8c5=3
Full House: r8c3=6
Naked Single: r9c1=8
Full House: r9c6=2
Full House: r7c5=8
Naked Single: r3c5=4
Full House: r5c5=6
Naked Single: r1c3=8
Full House: r1c1=6
Full House: r6c3=3
Naked Single: r7c1=3
Full House: r7c2=9
Naked Single: r1c4=9
Naked Single: r3c9=1
Full House: r3c6=3
Full House: r1c6=1
Naked Single: r1c9=4
Full House: r1c7=5
Full House: r4c7=4
Naked Single: r5c9=2
Full House: r6c9=9
Naked Single: r4c1=7
Full House: r5c1=4
Naked Single: r4c4=5
Naked Single: r6c6=8
Naked Single: r4c8=8
Full House: r4c6=9
Full House: r5c6=7
Full House: r5c8=5
Naked Single: r5c4=3
Full House: r6c4=4
Full House: r6c2=5
Full House: r5c2=8
|
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