task_name
string | initial_board
string | solution
string | title
string | rules
string | visual_elements
string | rows
int64 | cols
int64 | initial_observation
string | description
string | task_type
string | data_source
string | difficulty
string | hint
string | hodoku_difficulty
string | puzzle_id
string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
normal_sudoku_1594
|
...48..9....97384..9...2.3..1.3...7.7.9...3866..7...5.9.....7232..637.1.375219468
|
537481692126973845498562137812356974759124386643798251961845723284637519375219468
|
normal_sudoku_1594
|
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
| 9
|
. . . 4 8 . . 9 .
. . . 9 7 3 8 4 .
. 9 . . . 2 . 3 .
. 1 . 3 . . . 7 .
7 . 9 . . . 3 8 6
6 . . 7 . . . 5 .
9 . . . . . 7 2 3
2 . . 6 3 7 . 1 .
3 7 5 2 1 9 4 6 8
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
537481692126973845498562137812356974759124386643798251961845723284637519375219468 #1 Medium (254)
Hidden Single: r7c3=1
Hidden Single: r7c4=8
Hidden Single: r7c2=6
Hidden Single: r2c3=6
Locked Pair: 1,5 in r12c1 => r3c1<>1, r12c2,r34c1<>5
Naked Single: r2c2=2
Naked Single: r1c2=3
Naked Single: r1c3=7
Hidden Single: r5c2=5
Naked Single: r5c4=1
Full House: r3c4=5
Naked Single: r5c6=4
Full House: r5c5=2
Naked Single: r3c5=6
Full House: r1c6=1
Naked Single: r6c6=8
Naked Single: r7c6=5
Full House: r4c6=6
Full House: r7c5=4
Naked Single: r6c5=9
Full House: r4c5=5
Naked Single: r3c7=1
Naked Single: r1c1=5
Naked Single: r6c2=4
Full House: r8c2=8
Full House: r8c3=4
Naked Single: r2c9=5
Full House: r2c1=1
Naked Single: r3c9=7
Naked Single: r6c7=2
Naked Single: r1c9=2
Full House: r1c7=6
Naked Single: r4c1=8
Full House: r3c1=4
Full House: r3c3=8
Naked Single: r8c9=9
Full House: r8c7=5
Full House: r4c7=9
Naked Single: r6c3=3
Full House: r6c9=1
Full House: r4c3=2
Full House: r4c9=4
|
medium
| null |
normal_sudoku_1224
|
.7..........4...3.684.9..5....3.15.2.5.2.....9.......6.......8.1.3..........5.7.3
|
375612849219485637684793251768341592451269378932578416527936184143827965896154723
|
puzzles2_17_clue
|
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
| 9
|
. 7 . . . . . . .
. . . 4 . . . 3 .
6 8 4 . 9 . . 5 .
. . . 3 . 1 5 . 2
. 5 . 2 . . . . .
9 . . . . . . . 6
. . . . . . . 8 .
1 . 3 . . . . . .
. . . . 5 . 7 . 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
375612849219485637684793251768341592451269378932578416527936184143827965896154723 #1 Easy (506)
Hidden Single: r3c6=3
Hidden Single: r4c8=9
Hidden Single: r5c6=9
Hidden Single: r1c1=3
Hidden Single: r6c2=3
Hidden Single: r8c9=5
Hidden Single: r7c5=3
Hidden Single: r3c7=2
Hidden Single: r5c7=3
Hidden Single: r2c2=1
Hidden Single: r6c3=2
Hidden Single: r1c5=1
Naked Single: r3c4=7
Full House: r3c9=1
Hidden Single: r2c1=2
Hidden Single: r5c3=1
Hidden Single: r1c6=2
Hidden Single: r2c9=7
Hidden Single: r8c5=2
Hidden Single: r7c1=5
Hidden Single: r5c5=6
Naked Single: r2c5=8
Hidden Single: r7c2=2
Hidden Single: r9c8=2
Hidden Single: r8c6=7
Hidden Single: r7c3=7
Hidden Single: r9c4=1
Hidden Single: r6c8=1
Hidden Single: r7c7=1
Hidden Single: r8c4=8
Naked Single: r6c4=5
Naked Single: r1c4=6
Full House: r2c6=5
Full House: r7c4=9
Naked Single: r1c8=4
Naked Single: r2c3=9
Full House: r1c3=5
Full House: r2c7=6
Naked Single: r7c9=4
Full House: r7c6=6
Full House: r9c6=4
Full House: r6c6=8
Naked Single: r5c8=7
Full House: r8c8=6
Full House: r8c7=9
Full House: r8c2=4
Naked Single: r5c9=8
Full House: r6c7=4
Full House: r1c7=8
Full House: r1c9=9
Full House: r5c1=4
Full House: r6c5=7
Full House: r4c5=4
Naked Single: r9c1=8
Full House: r4c1=7
Naked Single: r4c2=6
Full House: r4c3=8
Full House: r9c3=6
Full House: r9c2=9
|
easy
|
Basic 9x9 Sudoku 1224
|
normal_sudoku_2071
|
.6.1259.3821...57.359......9367.4....7........8..1..67512673.9.64....7...93...62.
|
467125983821936574359847216936784152175362849284519367512673498648291735793458621
|
normal_sudoku_2071
|
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
| 9
|
. 6 . 1 2 5 9 . 3
8 2 1 . . . 5 7 .
3 5 9 . . . . . .
9 3 6 7 . 4 . . .
. 7 . . . . . . .
. 8 . . 1 . . 6 7
5 1 2 6 7 3 . 9 .
6 4 . . . . 7 . .
. 9 3 . . . 6 2 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
467125983821936574359847216936784152175362849284519367512673498648291735793458621 #1 Easy (172)
Naked Single: r9c1=7
Full House: r8c3=8
Naked Single: r1c1=4
Full House: r1c3=7
Full House: r1c8=8
Naked Single: r6c1=2
Full House: r5c1=1
Naked Single: r6c6=9
Naked Single: r2c6=6
Naked Single: r2c9=4
Naked Single: r3c8=1
Naked Single: r7c9=8
Full House: r7c7=4
Naked Single: r3c7=2
Full House: r3c9=6
Naked Single: r4c8=5
Naked Single: r6c7=3
Naked Single: r4c5=8
Naked Single: r8c8=3
Full House: r5c8=4
Naked Single: r5c7=8
Full House: r4c7=1
Full House: r4c9=2
Full House: r5c9=9
Naked Single: r6c4=5
Full House: r6c3=4
Full House: r5c3=5
Naked Single: r3c5=4
Naked Single: r5c6=2
Naked Single: r3c4=8
Full House: r3c6=7
Naked Single: r9c5=5
Naked Single: r5c4=3
Full House: r5c5=6
Naked Single: r8c6=1
Full House: r9c6=8
Naked Single: r9c4=4
Full House: r9c9=1
Full House: r8c9=5
Naked Single: r8c5=9
Full House: r2c5=3
Full House: r2c4=9
Full House: r8c4=2
|
easy
| null |
normal_sudoku_2192
|
.1..89....8..........435....7.....5.95....47.1...7386..9....7.5.4...213.....18...
|
312689547485127693769435218678294351953861472124573869291346785847952136536718924
|
puzzles1_unbiased
|
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
| 9
|
. 1 . . 8 9 . . .
. 8 . . . . . . .
. . . 4 3 5 . . .
. 7 . . . . . 5 .
9 5 . . . . 4 7 .
1 . . . 7 3 8 6 .
. 9 . . . . 7 . 5
. 4 . . . 2 1 3 .
. . . . 1 8 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
312689547485127693769435218678294351953861472124573869291346785847952136536718924 #1 Medium (416)
Naked Single: r6c2=2
Naked Single: r3c2=6
Full House: r9c2=3
Naked Single: r6c3=4
Naked Single: r6c9=9
Full House: r6c4=5
Hidden Single: r7c3=1
Hidden Single: r8c5=5
Hidden Single: r2c6=7
Hidden Single: r7c4=3
Hidden Single: r8c4=9
Hidden Single: r4c5=9
Hidden Single: r2c4=1
Hidden Single: r9c4=7
Hidden Single: r4c6=4
Naked Single: r7c6=6
Full House: r5c6=1
Full House: r7c5=4
Hidden Single: r3c8=1
Hidden Single: r4c9=1
Hidden Single: r3c9=8
Naked Single: r8c9=6
Hidden Single: r7c8=8
Full House: r7c1=2
Naked Single: r3c1=7
Naked Single: r8c1=8
Full House: r8c3=7
Hidden Single: r1c9=7
Naked Pair: 2,9 in r39c7 => r124c7<>2, r2c7<>9
Naked Single: r4c7=3
Full House: r5c9=2
Naked Single: r4c1=6
Naked Single: r5c5=6
Full House: r2c5=2
Full House: r1c4=6
Naked Single: r9c9=4
Full House: r2c9=3
Naked Single: r4c3=8
Full House: r4c4=2
Full House: r5c4=8
Full House: r5c3=3
Naked Single: r9c1=5
Full House: r9c3=6
Naked Single: r1c7=5
Naked Single: r2c1=4
Full House: r1c1=3
Naked Single: r1c3=2
Full House: r1c8=4
Naked Single: r2c7=6
Naked Single: r2c8=9
Full House: r2c3=5
Full House: r3c3=9
Full House: r3c7=2
Full House: r9c8=2
Full House: r9c7=9
|
medium
|
Basic 9x9 Sudoku 2192
|
normal_sudoku_839
|
.6......1..3..25..8..7..93..3.617.844.6528....87349.56.5..9......82..4.53....5.9.
|
762953841193482567845761932539617284416528379287349156651894723978236415324175698
|
normal_sudoku_839
|
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
| 9
|
. 6 . . . . . . 1
. . 3 . . 2 5 . .
8 . . 7 . . 9 3 .
. 3 . 6 1 7 . 8 4
4 . 6 5 2 8 . . .
. 8 7 3 4 9 . 5 6
. 5 . . 9 . . . .
. . 8 2 . . 4 . 5
3 . . . . 5 . 9 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
762953841193482567845761932539617284416528379287349156651894723978236415324175698 #1 Easy (180)
Naked Single: r4c7=2
Naked Single: r3c9=2
Naked Single: r6c7=1
Full House: r6c1=2
Naked Single: r5c8=7
Naked Single: r1c8=4
Naked Single: r5c7=3
Full House: r5c9=9
Full House: r5c2=1
Naked Single: r1c6=3
Naked Single: r2c8=6
Naked Single: r3c2=4
Naked Single: r2c5=8
Naked Single: r8c8=1
Full House: r7c8=2
Naked Single: r1c4=9
Naked Single: r1c5=5
Naked Single: r2c9=7
Full House: r1c7=8
Naked Single: r8c6=6
Naked Single: r1c1=7
Full House: r1c3=2
Naked Single: r3c5=6
Naked Single: r2c2=9
Naked Single: r9c9=8
Full House: r7c9=3
Naked Single: r3c6=1
Full House: r2c4=4
Full House: r2c1=1
Full House: r3c3=5
Full House: r7c6=4
Naked Single: r9c5=7
Full House: r8c5=3
Naked Single: r8c1=9
Full House: r8c2=7
Full House: r9c2=2
Naked Single: r9c4=1
Full House: r7c4=8
Naked Single: r7c1=6
Full House: r4c1=5
Full House: r4c3=9
Naked Single: r7c3=1
Full House: r9c3=4
Full House: r9c7=6
Full House: r7c7=7
|
easy
| null |
normal_sudoku_1730
|
..394.1..1.68.3..9..9651...5273968416..7.8...938.147.....48.......16..8.8...3..17
|
753942168146873259289651374527396841614728935938514726371485692492167583865239417
|
normal_sudoku_1730
|
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
| 9
|
. . 3 9 4 . 1 . .
1 . 6 8 . 3 . . 9
. . 9 6 5 1 . . .
5 2 7 3 9 6 8 4 1
6 . . 7 . 8 . . .
9 3 8 . 1 4 7 . .
. . . 4 8 . . . .
. . . 1 6 . . 8 .
8 . . . 3 . . 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
753942168146873259289651374527396841614728935938514726371485692492167583865239417 #1 Easy (184)
Naked Single: r5c5=2
Full House: r2c5=7
Full House: r6c4=5
Full House: r1c6=2
Full House: r9c4=2
Naked Single: r1c1=7
Hidden Single: r3c1=2
Naked Single: r7c1=3
Full House: r8c1=4
Naked Single: r9c3=5
Naked Single: r8c3=2
Naked Single: r9c6=9
Naked Single: r7c3=1
Full House: r5c3=4
Full House: r5c2=1
Naked Single: r9c2=6
Full House: r9c7=4
Naked Single: r3c7=3
Naked Single: r3c8=7
Hidden Single: r3c9=4
Full House: r3c2=8
Naked Single: r1c2=5
Full House: r2c2=4
Naked Single: r1c8=6
Full House: r1c9=8
Naked Single: r6c8=2
Full House: r6c9=6
Naked Single: r2c8=5
Full House: r2c7=2
Naked Single: r7c8=9
Full House: r5c8=3
Naked Single: r7c2=7
Full House: r8c2=9
Naked Single: r8c7=5
Naked Single: r5c9=5
Full House: r5c7=9
Full House: r7c7=6
Naked Single: r7c6=5
Full House: r7c9=2
Full House: r8c6=7
Full House: r8c9=3
|
easy
| null |
normal_sudoku_2780
|
5..18...46....91......7...2.29.5.4.3.......56.....4.....3..2....41.....8...3.79..
|
592186734637429185418573692129658473374291856856734219963812547741965328285347961
|
puzzles1_unbiased
|
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
| 9
|
5 . . 1 8 . . . 4
6 . . . . 9 1 . .
. . . . 7 . . . 2
. 2 9 . 5 . 4 . 3
. . . . . . . 5 6
. . . . . 4 . . .
. . 3 . . 2 . . .
. 4 1 . . . . . 8
. . . 3 . 7 9 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
592186734637429185418573692129658473374291856856734219963812547741965328285347961 #1 Medium (834)
Hidden Single: r1c3=2
Hidden Single: r7c4=8
Hidden Single: r6c9=9
Locked Triple: 5,6,9 in r8c456 => r7c5,r8c1<>9, r8c7<>5, r79c5,r8c78<>6
Locked Candidates Type 1 (Pointing): 6 in b4 => r6c45<>6
Hidden Single: r8c5=6
Naked Single: r8c6=5
Naked Single: r8c4=9
Hidden Single: r5c5=9
Locked Pair: 3,6 in r13c6 => r3c4,r4c6<>6, r2c5,r5c6<>3
Hidden Single: r4c4=6
Hidden Single: r6c5=3
Hidden Single: r2c5=2
Locked Candidates Type 1 (Pointing): 1 in b6 => r79c8<>1
Naked Triple: 4,7,8 in r235c3 => r6c3<>7, r69c3<>8
Hidden Pair: 5,6 in r6c23 => r6c2<>1, r6c2<>7, r6c2<>8
Hidden Pair: 3,4 in r35c1 => r35c1<>1, r35c1<>8, r3c1<>9, r5c1<>7
Hidden Single: r3c2=1
Hidden Single: r7c1=9
Hidden Single: r5c6=1
Naked Single: r4c6=8
Hidden Single: r3c8=9
Hidden Single: r1c2=9
Locked Candidates Type 1 (Pointing): 7 in b1 => r2c89<>7
Naked Single: r2c9=5
Naked Single: r2c4=4
Naked Single: r9c9=1
Full House: r7c9=7
Naked Single: r3c4=5
Naked Single: r9c5=4
Full House: r7c5=1
Hidden Single: r7c7=5
Naked Single: r7c2=6
Full House: r7c8=4
Naked Single: r6c2=5
Naked Single: r9c3=5
Naked Single: r6c3=6
Naked Single: r9c2=8
Naked Single: r9c1=2
Full House: r8c1=7
Full House: r9c8=6
Naked Single: r4c1=1
Full House: r4c8=7
Naked Single: r6c1=8
Naked Single: r1c8=3
Naked Single: r6c7=2
Naked Single: r1c6=6
Full House: r1c7=7
Full House: r3c6=3
Naked Single: r2c8=8
Full House: r3c7=6
Naked Single: r8c8=2
Full House: r6c8=1
Full House: r5c7=8
Full House: r6c4=7
Full House: r8c7=3
Full House: r5c4=2
Naked Single: r3c1=4
Full House: r3c3=8
Full House: r5c1=3
Naked Single: r2c3=7
Full House: r2c2=3
Full House: r5c2=7
Full House: r5c3=4
|
medium
|
Basic 9x9 Sudoku 2780
|
normal_sudoku_2867
|
....87..19..2.....285..1..3..3.9..2.........7....36.4...75...8..4.......31...2..5
|
436987251971253864285641793753498126864125937192736548627514389548379612319862475
|
puzzles1_unbiased
|
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
| 9
|
. . . . 8 7 . . 1
9 . . 2 . . . . .
2 8 5 . . 1 . . 3
. . 3 . 9 . . 2 .
. . . . . . . . 7
. . . . 3 6 . 4 .
. . 7 5 . . . 8 .
. 4 . . . . . . .
3 1 . . . 2 . . 5
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
436987251971253864285641793753498126864125937192736548627514389548379612319862475 #1 Medium (644)
Naked Single: r7c1=6
Naked Single: r1c1=4
Naked Single: r1c3=6
Naked Single: r1c2=3
Naked Single: r2c3=1
Full House: r2c2=7
Naked Single: r1c4=9
Naked Single: r1c8=5
Full House: r1c7=2
Naked Single: r2c8=6
Hidden Single: r8c1=5
Hidden Single: r5c5=2
Hidden Single: r5c3=4
Hidden Single: r8c4=3
Hidden Single: r2c6=3
Hidden Single: r2c5=5
Hidden Single: r7c7=3
Hidden Single: r5c8=3
Hidden Single: r7c5=1
Hidden Single: r8c8=1
Locked Candidates Type 1 (Pointing): 4 in b2 => r3c7<>4
Locked Candidates Type 1 (Pointing): 7 in b5 => r9c4<>7
Locked Candidates Type 1 (Pointing): 8 in b7 => r6c3<>8
Naked Pair: 1,8 in r5c14 => r5c67<>8, r5c7<>1
Naked Single: r5c6=5
Naked Triple: 6,8,9 in r46c9,r5c7 => r4c7<>6, r46c7<>8, r6c7<>9
Hidden Single: r2c7=8
Full House: r2c9=4
Hidden Single: r9c7=4
Hidden Single: r7c6=4
Naked Single: r4c6=8
Full House: r8c6=9
Naked Single: r4c9=6
Naked Single: r5c4=1
Naked Single: r4c2=5
Naked Single: r5c7=9
Naked Single: r8c9=2
Naked Single: r5c1=8
Full House: r5c2=6
Naked Single: r6c4=7
Full House: r4c4=4
Naked Single: r4c7=1
Full House: r4c1=7
Full House: r6c1=1
Naked Single: r3c7=7
Full House: r3c8=9
Full House: r9c8=7
Naked Single: r6c9=8
Full House: r7c9=9
Full House: r6c7=5
Full House: r8c7=6
Full House: r7c2=2
Full House: r6c2=9
Full House: r6c3=2
Naked Single: r8c3=8
Full House: r8c5=7
Full House: r9c3=9
Naked Single: r3c4=6
Full House: r3c5=4
Full House: r9c5=6
Full House: r9c4=8
|
medium
|
Basic 9x9 Sudoku 2867
|
normal_sudoku_415
|
..6.89.15..4.56.82..82.7.36....9.65.63.....98..9...32...192..63..3....718.5.31249
|
326489715174356982958217436482193657637542198519678324741925863293864571865731249
|
normal_sudoku_415
|
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
| 9
|
. . 6 . 8 9 . 1 5
. . 4 . 5 6 . 8 2
. . 8 2 . 7 . 3 6
. . . . 9 . 6 5 .
6 3 . . . . . 9 8
. . 9 . . . 3 2 .
. . 1 9 2 . . 6 3
. . 3 . . . . 7 1
8 . 5 . 3 1 2 4 9
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
326489715174356982958217436482193657637542198519678324741925863293864571865731249 #1 Easy (204)
Hidden Single: r5c7=1
Hidden Single: r4c6=3
Hidden Single: r9c4=7
Full House: r9c2=6
Hidden Single: r5c6=2
Naked Single: r5c3=7
Full House: r4c3=2
Naked Single: r5c5=4
Full House: r5c4=5
Naked Single: r3c5=1
Naked Single: r8c5=6
Full House: r6c5=7
Naked Single: r6c6=8
Naked Single: r2c4=3
Full House: r1c4=4
Naked Single: r6c9=4
Full House: r4c9=7
Naked Single: r4c4=1
Full House: r6c4=6
Full House: r8c4=8
Naked Single: r1c7=7
Naked Single: r4c1=4
Full House: r4c2=8
Naked Single: r8c7=5
Full House: r7c7=8
Naked Single: r1c2=2
Full House: r1c1=3
Naked Single: r2c7=9
Full House: r3c7=4
Naked Single: r7c1=7
Naked Single: r8c6=4
Full House: r7c6=5
Full House: r7c2=4
Naked Single: r2c1=1
Full House: r2c2=7
Naked Single: r8c2=9
Full House: r8c1=2
Naked Single: r6c1=5
Full House: r3c1=9
Full House: r3c2=5
Full House: r6c2=1
|
easy
| null |
normal_sudoku_2081
|
5......84478.9125.6...48..774.815.3..8....54.3.54..87..37.8.4.58.4.527..1...74..8
|
591237684478691253623548197746815932289763541315429876937186425864352719152974368
|
normal_sudoku_2081
|
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
| 9
|
5 . . . . . . 8 4
4 7 8 . 9 1 2 5 .
6 . . . 4 8 . . 7
7 4 . 8 1 5 . 3 .
. 8 . . . . 5 4 .
3 . 5 4 . . 8 7 .
. 3 7 . 8 . 4 . 5
8 . 4 . 5 2 7 . .
1 . . . 7 4 . . 8
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
591237684478691253623548197746815932289763541315429876937186425864352719152974368 #1 Medium (336)
Hidden Single: r3c4=5
Hidden Single: r9c2=5
Locked Candidates Type 1 (Pointing): 2 in b2 => r1c23<>2
Locked Candidates Type 1 (Pointing): 1 in b6 => r8c9<>1
Locked Candidates Type 1 (Pointing): 3 in b8 => r125c4<>3
Naked Single: r2c4=6
Full House: r2c9=3
Hidden Single: r1c7=6
Naked Single: r4c7=9
Naked Single: r3c7=1
Full House: r9c7=3
Full House: r3c8=9
Naked Single: r9c4=9
Naked Single: r3c2=2
Full House: r3c3=3
Naked Single: r7c4=1
Naked Single: r7c6=6
Full House: r8c4=3
Naked Single: r6c6=9
Naked Single: r7c8=2
Full House: r7c1=9
Full House: r5c1=2
Naked Single: r9c8=6
Full House: r8c8=1
Full House: r8c9=9
Full House: r8c2=6
Full House: r9c3=2
Naked Single: r4c3=6
Full House: r4c9=2
Naked Single: r5c4=7
Full House: r1c4=2
Naked Single: r6c2=1
Full House: r1c2=9
Full House: r5c3=9
Full House: r1c3=1
Naked Single: r5c6=3
Full House: r1c6=7
Full House: r1c5=3
Naked Single: r6c9=6
Full House: r5c9=1
Full House: r5c5=6
Full House: r6c5=2
|
medium
| null |
normal_sudoku_2852
|
7815......9.8.7...3...61...2.34..1..8..1....461...5.28.6..9.4.......4.8..3..5.6..
|
781542396596837241342961875253489167879126534614375928168793452925614783437258619
|
puzzles4_forum_hardest_1905
|
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
| 9
|
7 8 1 5 . . . . .
. 9 . 8 . 7 . . .
3 . . . 6 1 . . .
2 . 3 4 . . 1 . .
8 . . 1 . . . . 4
6 1 . . . 5 . 2 8
. 6 . . 9 . 4 . .
. . . . . 4 . 8 .
. 3 . . 5 . 6 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
781542396596837241342961875253489167879126534614375928168793452925614783437258619 #1 Easy (344)
Hidden Single: r2c3=6
Hidden Single: r6c3=4
Hidden Single: r3c7=8
Hidden Single: r3c2=4
Naked Single: r2c1=5
Full House: r3c3=2
Naked Single: r7c1=1
Naked Single: r3c4=9
Naked Single: r8c1=9
Full House: r9c1=4
Hidden Single: r8c5=1
Hidden Single: r4c5=8
Hidden Single: r8c4=6
Hidden Single: r5c3=9
Hidden Single: r8c2=2
Hidden Single: r6c7=9
Hidden Single: r4c6=9
Hidden Single: r5c6=6
Hidden Single: r5c5=2
Hidden Single: r1c6=2
Naked Single: r1c7=3
Naked Single: r9c6=8
Full House: r7c6=3
Naked Single: r1c5=4
Full House: r2c5=3
Full House: r6c5=7
Full House: r6c4=3
Naked Single: r2c7=2
Naked Single: r9c3=7
Naked Single: r2c9=1
Full House: r2c8=4
Naked Single: r8c3=5
Full House: r7c3=8
Naked Single: r9c4=2
Full House: r7c4=7
Naked Single: r8c7=7
Full House: r5c7=5
Full House: r8c9=3
Naked Single: r9c9=9
Full House: r9c8=1
Naked Single: r7c8=5
Full House: r7c9=2
Naked Single: r5c2=7
Full House: r4c2=5
Full House: r5c8=3
Naked Single: r1c9=6
Full House: r1c8=9
Naked Single: r3c8=7
Full House: r3c9=5
Full House: r4c9=7
Full House: r4c8=6
|
easy
|
Basic 9x9 Sudoku 2852
|
normal_sudoku_3842
|
..81..4..2...5...961..4....12.7...9..7.8.6..3..5..47....1..25...6.....2..3...16.7
|
958173462243658179617249385126735894479816253385924716791462538564387921832591647
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. . 8 1 . . 4 . .
2 . . . 5 . . . 9
6 1 . . 4 . . . .
1 2 . 7 . . . 9 .
. 7 . 8 . 6 . . 3
. . 5 . . 4 7 . .
. . 1 . . 2 5 . .
. 6 . . . . . 2 .
. 3 . . . 1 6 . 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
958173462243658179617249385126735894479816253385924716791462538564387921832591647 #1 Easy (278)
Naked Single: r4c5=3
Naked Single: r2c2=4
Naked Single: r4c7=8
Naked Single: r4c6=5
Hidden Single: r5c8=5
Hidden Single: r4c3=6
Full House: r4c9=4
Naked Single: r7c9=8
Naked Single: r7c2=9
Naked Single: r8c9=1
Naked Single: r9c8=4
Naked Single: r1c2=5
Full House: r6c2=8
Naked Single: r7c8=3
Full House: r8c7=9
Naked Single: r9c3=2
Hidden Single: r6c1=3
Hidden Single: r3c9=5
Hidden Single: r1c6=3
Naked Single: r2c4=6
Naked Single: r7c4=4
Naked Single: r7c1=7
Full House: r7c5=6
Naked Single: r1c1=9
Naked Single: r8c3=4
Naked Single: r5c1=4
Full House: r5c3=9
Hidden Single: r8c4=3
Hidden Single: r3c6=9
Naked Single: r3c4=2
Naked Single: r1c5=7
Full House: r2c6=8
Full House: r8c6=7
Naked Single: r3c7=3
Naked Single: r6c4=9
Full House: r9c4=5
Naked Single: r1c8=6
Full House: r1c9=2
Full House: r6c9=6
Naked Single: r8c5=8
Full House: r8c1=5
Full House: r9c1=8
Full House: r9c5=9
Naked Single: r2c7=1
Full House: r5c7=2
Full House: r6c8=1
Full House: r5c5=1
Full House: r6c5=2
Naked Single: r3c3=7
Full House: r2c3=3
Full House: r2c8=7
Full House: r3c8=8
|
easy
|
Basic 9x9 Sudoku 3842
|
normal_sudoku_918
|
.4...7...2....8.9...3..5......5...7..7..8...462...9.1.168.925....9.....8......9..
|
546927381217638495893145762384561279971283654625479813168392547439756128752814936
|
puzzles1_unbiased
|
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
| 9
|
. 4 . . . 7 . . .
2 . . . . 8 . 9 .
. . 3 . . 5 . . .
. . . 5 . . . 7 .
. 7 . . 8 . . . 4
6 2 . . . 9 . 1 .
1 6 8 . 9 2 5 . .
. . 9 . . . . . 8
. . . . . . 9 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
546927381217638495893145762384561279971283654625479813168392547439756128752814936 #1 Medium (654)
Hidden Single: r9c3=2
Hidden Single: r6c7=8
Hidden Single: r9c4=8
Hidden Single: r5c1=9
Hidden Single: r4c9=9
Hidden Single: r2c3=7
Naked Single: r3c1=8
Naked Single: r1c1=5
Naked Single: r2c2=1
Naked Single: r1c3=6
Full House: r3c2=9
Hidden Single: r1c4=9
Hidden Single: r1c8=8
Hidden Single: r4c2=8
Hidden Single: r5c8=5
Naked Single: r5c3=1
Naked Single: r6c9=3
Naked Single: r4c3=4
Full House: r6c3=5
Full House: r4c1=3
Naked Single: r7c9=7
Hidden Single: r2c9=5
Hidden Single: r3c7=7
Locked Candidates Type 1 (Pointing): 3 in b3 => r8c7<>3
Locked Candidates Type 1 (Pointing): 2 in b6 => r18c7<>2
Hidden Single: r8c8=2
Locked Candidates Type 1 (Pointing): 6 in b6 => r28c7<>6
Locked Candidates Type 1 (Pointing): 6 in b3 => r3c45<>6
Locked Candidates Type 1 (Pointing): 6 in b9 => r9c56<>6
Locked Candidates Type 2 (Claiming): 4 in c6 => r78c4,r89c5<>4
Naked Single: r7c4=3
Full House: r7c8=4
Naked Single: r3c8=6
Full House: r9c8=3
Naked Single: r8c7=1
Full House: r9c9=6
Naked Single: r9c2=5
Full House: r8c2=3
Naked Single: r1c7=3
Naked Single: r2c7=4
Naked Single: r2c4=6
Full House: r2c5=3
Naked Single: r5c4=2
Naked Single: r8c4=7
Naked Single: r5c7=6
Full House: r4c7=2
Full House: r5c6=3
Naked Single: r6c4=4
Full House: r3c4=1
Full House: r6c5=7
Naked Single: r8c1=4
Full House: r9c1=7
Naked Single: r9c5=1
Full House: r9c6=4
Naked Single: r1c5=2
Full House: r1c9=1
Full House: r3c9=2
Full House: r3c5=4
Naked Single: r8c6=6
Full House: r4c6=1
Full House: r4c5=6
Full House: r8c5=5
|
medium
|
Basic 9x9 Sudoku 918
|
normal_sudoku_4983
|
3....5..48..39.5...754...3.183.4...54.75..381.56813.475.8..6..373.158.2.612934758
|
391625874864397512275481639183742965427569381956813247548276193739158426612934758
|
normal_sudoku_4983
|
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
| 9
|
3 . . . . 5 . . 4
8 . . 3 9 . 5 . .
. 7 5 4 . . . 3 .
1 8 3 . 4 . . . 5
4 . 7 5 . . 3 8 1
. 5 6 8 1 3 . 4 7
5 . 8 . . 6 . . 3
7 3 . 1 5 8 . 2 .
6 1 2 9 3 4 7 5 8
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
391625874864397512275481639183742965427569381956813247548276193739158426612934758 #1 Easy (182)
Hidden Single: r5c5=6
Hidden Single: r1c4=6
Hidden Single: r2c2=6
Naked Single: r2c9=2
Hidden Single: r4c8=6
Hidden Single: r2c3=4
Naked Single: r8c3=9
Full House: r1c3=1
Full House: r7c2=4
Naked Single: r8c9=6
Full House: r3c9=9
Full House: r8c7=4
Naked Single: r1c7=8
Naked Single: r1c8=7
Naked Single: r3c1=2
Full House: r1c2=9
Full House: r1c5=2
Full House: r6c1=9
Full House: r5c2=2
Full House: r6c7=2
Full House: r5c6=9
Full House: r4c7=9
Naked Single: r2c8=1
Full House: r2c6=7
Full House: r3c7=6
Full House: r7c7=1
Full House: r7c8=9
Naked Single: r3c5=8
Full House: r3c6=1
Full House: r7c5=7
Full House: r4c6=2
Full House: r7c4=2
Full House: r4c4=7
|
easy
| null |
normal_sudoku_5561
|
189624537..45..2...7..3...4....8....41.9..3....62..9....17...52..7315..9....6.713
|
189624537634571298572839164923186475418957326756243981341798652267315849895462713
|
normal_sudoku_5561
|
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
| 9
|
1 8 9 6 2 4 5 3 7
. . 4 5 . . 2 . .
. 7 . . 3 . . . 4
. . . . 8 . . . .
4 1 . 9 . . 3 . .
. . 6 2 . . 9 . .
. . 1 7 . . . 5 2
. . 7 3 1 5 . . 9
. . . . 6 . 7 1 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
189624537634571298572839164923186475418957326756243981341798652267315849895462713 #1 Easy (250)
Hidden Single: r9c6=2
Hidden Single: r4c3=3
Naked Single: r6c2=5
Hidden Single: r6c6=3
Hidden Single: r4c9=5
Hidden Single: r5c5=5
Hidden Single: r6c9=1
Hidden Single: r2c6=1
Naked Single: r3c4=8
Naked Single: r3c6=9
Full House: r2c5=7
Naked Single: r9c4=4
Full House: r4c4=1
Naked Single: r3c8=6
Naked Single: r7c6=8
Full House: r7c5=9
Full House: r6c5=4
Naked Single: r9c2=9
Naked Single: r2c9=8
Full House: r5c9=6
Naked Single: r3c7=1
Full House: r2c8=9
Naked Single: r4c2=2
Naked Single: r4c7=4
Naked Single: r5c6=7
Full House: r4c6=6
Naked Single: r5c3=8
Full House: r5c8=2
Naked Single: r4c8=7
Full House: r4c1=9
Full House: r6c1=7
Full House: r6c8=8
Full House: r8c8=4
Naked Single: r7c7=6
Full House: r8c7=8
Naked Single: r9c3=5
Full House: r3c3=2
Full House: r9c1=8
Full House: r3c1=5
Naked Single: r8c2=6
Full House: r8c1=2
Naked Single: r7c1=3
Full House: r2c1=6
Full House: r2c2=3
Full House: r7c2=4
|
easy
| null |
normal_sudoku_5088
|
....8..5.4....59.....3.9..2....642...7.2183....65...84.4....7....8..1.9391....8..
|
639182457421675938857349612183964275574218369296537184345896721768421593912753846
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. . . . 8 . . 5 .
4 . . . . 5 9 . .
. . . 3 . 9 . . 2
. . . . 6 4 2 . .
. 7 . 2 1 8 3 . .
. . 6 5 . . . 8 4
. 4 . . . . 7 . .
. . 8 . . 1 . 9 3
9 1 . . . . 8 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
639182457421675938857349612183964275574218369296537184345896721768421593912753846 #1 Easy (258)
Naked Single: r6c7=1
Naked Single: r5c8=6
Naked Single: r5c1=5
Naked Single: r4c8=7
Naked Single: r5c9=9
Full House: r4c9=5
Full House: r5c3=4
Naked Single: r4c4=9
Naked Single: r9c9=6
Naked Single: r7c9=1
Naked Single: r1c9=7
Full House: r2c9=8
Naked Single: r7c8=2
Naked Single: r9c8=4
Full House: r8c7=5
Naked Single: r3c8=1
Full House: r2c8=3
Naked Single: r9c4=7
Hidden Single: r7c4=8
Hidden Single: r1c3=9
Hidden Single: r6c2=9
Hidden Single: r7c5=9
Hidden Single: r3c2=5
Naked Single: r3c3=7
Naked Single: r3c5=4
Naked Single: r3c7=6
Full House: r1c7=4
Full House: r3c1=8
Naked Single: r8c5=2
Naked Single: r2c5=7
Naked Single: r8c2=6
Naked Single: r9c6=3
Naked Single: r6c5=3
Full House: r6c6=7
Full House: r9c5=5
Full House: r6c1=2
Full House: r9c3=2
Naked Single: r2c2=2
Naked Single: r7c1=3
Naked Single: r8c1=7
Full House: r8c4=4
Full House: r7c6=6
Full House: r7c3=5
Full House: r1c6=2
Naked Single: r2c3=1
Full House: r2c4=6
Full House: r4c3=3
Full House: r1c4=1
Naked Single: r1c2=3
Full House: r1c1=6
Full House: r4c1=1
Full House: r4c2=8
|
easy
|
Basic 9x9 Sudoku 5088
|
normal_sudoku_3785
|
..56.497379..356.....27951...2.4...6...3.28...1.856.9.8..5.......4..3..5.5.42.7..
|
125684973798135624346279518982741356567392841413856297839517462274963185651428739
|
normal_sudoku_3785
|
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
| 9
|
. . 5 6 . 4 9 7 3
7 9 . . 3 5 6 . .
. . . 2 7 9 5 1 .
. . 2 . 4 . . . 6
. . . 3 . 2 8 . .
. 1 . 8 5 6 . 9 .
8 . . 5 . . . . .
. . 4 . . 3 . . 5
. 5 . 4 2 . 7 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
125684973798135624346279518982741356567392841413856297839517462274963185651428739 #1 Easy (230)
Naked Single: r2c4=1
Full House: r1c5=8
Naked Single: r2c3=8
Naked Single: r1c2=2
Full House: r1c1=1
Hidden Single: r4c2=8
Hidden Single: r9c6=8
Hidden Single: r8c8=8
Hidden Single: r3c9=8
Hidden Single: r8c1=2
Naked Single: r8c7=1
Naked Single: r4c7=3
Naked Single: r9c9=9
Naked Single: r4c8=5
Naked Single: r4c1=9
Naked Single: r5c8=4
Naked Single: r4c4=7
Full House: r4c6=1
Full House: r8c4=9
Full House: r5c5=9
Full House: r7c6=7
Naked Single: r2c8=2
Full House: r2c9=4
Naked Single: r6c7=2
Full House: r7c7=4
Naked Single: r8c5=6
Full House: r7c5=1
Full House: r8c2=7
Naked Single: r7c9=2
Naked Single: r6c9=7
Full House: r5c9=1
Naked Single: r5c2=6
Naked Single: r6c3=3
Full House: r6c1=4
Naked Single: r5c1=5
Full House: r5c3=7
Naked Single: r7c2=3
Full House: r3c2=4
Naked Single: r3c3=6
Full House: r3c1=3
Full House: r9c1=6
Naked Single: r7c8=6
Full House: r7c3=9
Full House: r9c3=1
Full House: r9c8=3
|
easy
| null |
normal_sudoku_6844
|
..14..6233.....495.9....781968.2.147.7....8595.4...3621..67.2.8...2.591...2.185..
|
781459623326781495495362781968523147273146859514897362159674238847235916632918574
|
normal_sudoku_6844
|
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
| 9
|
. . 1 4 . . 6 2 3
3 . . . . . 4 9 5
. 9 . . . . 7 8 1
9 6 8 . 2 . 1 4 7
. 7 . . . . 8 5 9
5 . 4 . . . 3 6 2
1 . . 6 7 . 2 . 8
. . . 2 . 5 9 1 .
. . 2 . 1 8 5 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
781459623326781495495362781968523147273146859514897362159674238847235916632918574 #1 Easy (156)
Naked Single: r6c2=1
Naked Single: r5c1=2
Full House: r5c3=3
Naked Single: r7c8=3
Full House: r9c8=7
Naked Single: r4c6=3
Full House: r4c4=5
Naked Single: r5c4=1
Naked Single: r3c4=3
Naked Single: r9c4=9
Naked Single: r7c6=4
Full House: r8c5=3
Naked Single: r5c6=6
Full House: r5c5=4
Naked Single: r7c2=5
Full House: r7c3=9
Naked Single: r3c6=2
Naked Single: r1c2=8
Naked Single: r1c1=7
Naked Single: r2c2=2
Naked Single: r8c2=4
Full House: r9c2=3
Naked Single: r1c6=9
Full House: r1c5=5
Naked Single: r2c3=6
Naked Single: r8c9=6
Full House: r9c9=4
Full House: r9c1=6
Naked Single: r6c6=7
Full House: r2c6=1
Naked Single: r3c5=6
Naked Single: r2c5=8
Full House: r2c4=7
Full House: r6c4=8
Full House: r6c5=9
Naked Single: r3c1=4
Full House: r3c3=5
Full House: r8c3=7
Full House: r8c1=8
|
easy
| null |
normal_sudoku_2433
|
..1.5.........76...561..378...74......4..85379.5......6.....8.2.9.......2..3..79.
|
731856429829437651456192378382745916164928537975613284613579842597284163248361795
|
puzzles1_unbiased
|
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
| 9
|
. . 1 . 5 . . . .
. . . . . 7 6 . .
. 5 6 1 . . 3 7 8
. . . 7 4 . . . .
. . 4 . . 8 5 3 7
9 . 5 . . . . . .
6 . . . . . 8 . 2
. 9 . . . . . . .
2 . . 3 . . 7 9 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
731856429829437651456192378382745916164928537975613284613579842597284163248361795 #1 Easy (336)
Naked Single: r3c1=4
Naked Single: r5c1=1
Naked Single: r9c3=8
Hidden Single: r4c6=5
Hidden Single: r6c2=7
Hidden Single: r2c3=9
Hidden Single: r8c1=5
Hidden Single: r8c9=3
Naked Single: r8c3=7
Naked Single: r7c3=3
Full House: r4c3=2
Naked Single: r5c2=6
Hidden Single: r9c9=5
Hidden Single: r1c1=7
Hidden Single: r6c8=8
Hidden Single: r7c4=5
Hidden Single: r7c5=7
Hidden Single: r2c8=5
Hidden Single: r8c8=6
Naked Single: r4c8=1
Naked Single: r4c7=9
Naked Single: r7c8=4
Full House: r1c8=2
Full House: r8c7=1
Naked Single: r4c9=6
Naked Single: r7c2=1
Full House: r7c6=9
Full House: r9c2=4
Naked Single: r1c7=4
Full House: r6c7=2
Full House: r6c9=4
Naked Single: r3c6=2
Full House: r3c5=9
Naked Single: r1c9=9
Full House: r2c9=1
Naked Single: r6c4=6
Naked Single: r8c6=4
Naked Single: r5c5=2
Full House: r5c4=9
Naked Single: r1c4=8
Naked Single: r8c5=8
Full House: r8c4=2
Full House: r2c4=4
Naked Single: r1c2=3
Full House: r1c6=6
Full House: r2c5=3
Naked Single: r2c1=8
Full House: r2c2=2
Full House: r4c2=8
Full House: r4c1=3
Naked Single: r9c6=1
Full House: r6c6=3
Full House: r6c5=1
Full House: r9c5=6
|
easy
|
Basic 9x9 Sudoku 2433
|
normal_sudoku_1164
|
......24.32.1648.9.48..2..6.89.....25.279.3...34..6.9.896......2715.....453689127
|
615978243327164859948352716189435672562791384734826591896217435271543968453689127
|
normal_sudoku_1164
|
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
| 9
|
. . . . . . 2 4 .
3 2 . 1 6 4 8 . 9
. 4 8 . . 2 . . 6
. 8 9 . . . . . 2
5 . 2 7 9 . 3 . .
. 3 4 . . 6 . 9 .
8 9 6 . . . . . .
2 7 1 5 . . . . .
4 5 3 6 8 9 1 2 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
615978243327164859948352716189435672562791384734826591896217435271543968453689127 #1 Easy (190)
Naked Single: r8c6=3
Naked Single: r8c5=4
Naked Single: r7c4=2
Naked Single: r8c9=8
Naked Single: r6c4=8
Naked Single: r8c8=6
Full House: r8c7=9
Naked Single: r5c6=1
Naked Single: r4c6=5
Naked Single: r5c2=6
Full House: r1c2=1
Naked Single: r5c8=8
Full House: r5c9=4
Naked Single: r7c6=7
Full House: r1c6=8
Full House: r7c5=1
Naked Single: r4c5=3
Naked Single: r6c5=2
Full House: r4c4=4
Hidden Single: r4c7=6
Hidden Single: r1c1=6
Hidden Single: r6c9=1
Naked Single: r4c8=7
Full House: r4c1=1
Full House: r6c1=7
Full House: r6c7=5
Full House: r3c1=9
Naked Single: r2c8=5
Full House: r2c3=7
Full House: r1c3=5
Naked Single: r3c7=7
Full House: r7c7=4
Naked Single: r3c4=3
Full House: r1c4=9
Naked Single: r1c9=3
Full House: r1c5=7
Full House: r3c5=5
Full House: r3c8=1
Full House: r7c8=3
Full House: r7c9=5
|
easy
| null |
normal_sudoku_1160
|
..93.6......8...41..3....2...8....3.9...61..84.17........17..8.3.2.5.....6.4.....
|
149326857256897341783514926678945132935261478421783569594172683312658794867439215
|
puzzles1_unbiased
|
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
| 9
|
. . 9 3 . 6 . . .
. . . 8 . . . 4 1
. . 3 . . . . 2 .
. . 8 . . . . 3 .
9 . . . 6 1 . . 8
4 . 1 7 . . . . .
. . . 1 7 . . 8 .
3 . 2 . 5 . . . .
. 6 . 4 . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
149326857256897341783514926678945132935261478421783569594172683312658794867439215 #1 Medium (344)
Naked Single: r7c1=5
Naked Single: r7c3=4
Naked Single: r9c3=7
Naked Single: r7c2=9
Naked Single: r5c3=5
Full House: r2c3=6
Naked Single: r5c4=2
Naked Single: r5c8=7
Naked Single: r1c8=5
Naked Single: r5c2=3
Full House: r5c7=4
Naked Single: r1c9=7
Naked Single: r6c2=2
Naked Single: r1c7=8
Naked Single: r4c2=7
Full House: r4c1=6
Naked Single: r2c2=5
Hidden Single: r2c7=3
Hidden Single: r4c7=1
Hidden Single: r8c4=6
Hidden Single: r8c9=4
Hidden Single: r8c7=7
Hidden Single: r4c9=2
Hidden Single: r6c8=6
Locked Candidates Type 1 (Pointing): 9 in b3 => r3c456<>9
Naked Single: r3c4=5
Full House: r4c4=9
Naked Single: r4c5=4
Full House: r4c6=5
Naked Single: r3c5=1
Naked Single: r1c5=2
Naked Single: r1c1=1
Full House: r1c2=4
Naked Single: r2c5=9
Naked Single: r9c1=8
Full House: r8c2=1
Full House: r3c2=8
Naked Single: r2c6=7
Full House: r2c1=2
Full House: r3c1=7
Full House: r3c6=4
Naked Single: r9c5=3
Full House: r6c5=8
Full House: r6c6=3
Naked Single: r8c8=9
Full House: r8c6=8
Full House: r9c8=1
Naked Single: r7c6=2
Full House: r9c6=9
Naked Single: r9c9=5
Full House: r9c7=2
Naked Single: r7c7=6
Full House: r7c9=3
Naked Single: r6c9=9
Full House: r3c9=6
Full House: r3c7=9
Full House: r6c7=5
|
medium
|
Basic 9x9 Sudoku 1160
|
normal_sudoku_2626
|
1....5.2..7......8..6.3.9.....6..5....4.9...3.9...7....2.....198..75...4..94.16..
|
148975326973246158256138947387614592614592873592387461425863719861759234739421685
|
puzzles4_forum_hardest_1905
|
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
| 9
|
1 . . . . 5 . 2 .
. 7 . . . . . . 8
. . 6 . 3 . 9 . .
. . . 6 . . 5 . .
. . 4 . 9 . . . 3
. 9 . . . 7 . . .
. 2 . . . . . 1 9
8 . . 7 5 . . . 4
. . 9 4 . 1 6 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
148975326973246158256138947387614592614592873592387461425863719861759234739421685 #1 Easy (320)
Naked Single: r8c8=3
Naked Single: r8c3=1
Naked Single: r8c7=2
Naked Single: r8c2=6
Full House: r8c6=9
Hidden Single: r4c8=9
Hidden Single: r1c5=7
Naked Single: r1c9=6
Hidden Single: r1c4=9
Hidden Single: r2c1=9
Hidden Single: r7c1=4
Hidden Single: r9c5=2
Hidden Single: r7c3=5
Naked Single: r9c2=3
Full House: r9c1=7
Naked Single: r9c9=5
Full House: r9c8=8
Full House: r7c7=7
Hidden Single: r2c8=5
Hidden Single: r4c3=7
Hidden Single: r5c8=7
Naked Single: r3c8=4
Full House: r6c8=6
Naked Single: r1c7=3
Naked Single: r1c3=8
Full House: r1c2=4
Naked Single: r2c7=1
Full House: r3c9=7
Naked Single: r3c2=5
Naked Single: r2c4=2
Naked Single: r5c7=8
Full House: r6c7=4
Naked Single: r3c1=2
Full House: r2c3=3
Full House: r6c3=2
Naked Single: r3c6=8
Full House: r3c4=1
Naked Single: r5c2=1
Full House: r4c2=8
Naked Single: r5c6=2
Naked Single: r4c1=3
Naked Single: r6c9=1
Full House: r4c9=2
Naked Single: r5c4=5
Full House: r5c1=6
Full House: r6c1=5
Naked Single: r4c6=4
Full House: r4c5=1
Naked Single: r6c5=8
Full House: r6c4=3
Full House: r7c4=8
Naked Single: r2c6=6
Full House: r2c5=4
Full House: r7c5=6
Full House: r7c6=3
|
easy
|
Basic 9x9 Sudoku 2626
|
normal_sudoku_1259
|
2...53......92.7.64......2....6..51.81.........4..73.9.783...9..4.7.1.5.....6...3
|
267153948185924736493876125732689514819435267654217389578342691346791852921568473
|
puzzles1_unbiased
|
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
| 9
|
2 . . . 5 3 . . .
. . . 9 2 . 7 . 6
4 . . . . . . 2 .
. . . 6 . . 5 1 .
8 1 . . . . . . .
. . 4 . . 7 3 . 9
. 7 8 3 . . . 9 .
. 4 . 7 . 1 . 5 .
. . . . 6 . . . 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
267153948185924736493876125732689514819435267654217389578342691346791852921568473 #1 Easy (402)
Naked Single: r7c5=4
Hidden Single: r4c1=7
Hidden Single: r1c3=7
Hidden Single: r3c5=7
Hidden Single: r3c9=5
Hidden Single: r3c6=6
Hidden Single: r2c8=3
Hidden Single: r9c8=7
Hidden Single: r5c9=7
Hidden Single: r1c2=6
Hidden Single: r6c5=1
Hidden Single: r8c1=3
Hidden Single: r2c6=4
Hidden Single: r9c7=4
Hidden Single: r1c7=9
Hidden Single: r9c1=9
Hidden Single: r5c4=4
Naked Single: r5c8=6
Naked Single: r5c7=2
Naked Single: r6c8=8
Full House: r1c8=4
Full House: r4c9=4
Hidden Single: r2c2=8
Hidden Single: r8c5=9
Naked Single: r5c5=3
Full House: r4c5=8
Hidden Single: r9c3=1
Naked Single: r2c3=5
Full House: r2c1=1
Naked Single: r5c3=9
Full House: r5c6=5
Naked Single: r3c3=3
Full House: r3c2=9
Naked Single: r6c4=2
Full House: r4c6=9
Naked Single: r7c6=2
Full House: r9c6=8
Full House: r9c4=5
Full House: r9c2=2
Naked Single: r4c3=2
Full House: r4c2=3
Full House: r6c2=5
Full House: r8c3=6
Full House: r6c1=6
Full House: r7c1=5
Naked Single: r7c9=1
Full House: r7c7=6
Naked Single: r8c7=8
Full House: r3c7=1
Full House: r1c9=8
Full House: r8c9=2
Full House: r3c4=8
Full House: r1c4=1
|
easy
|
Basic 9x9 Sudoku 1259
|
normal_sudoku_3717
|
7..5....2.381..57..657..3....1.4.........2.156..851.2.8426.5.3.197483.5635621..8.
|
714539862238164579965728341521346798483972615679851423842695137197483256356217984
|
normal_sudoku_3717
|
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
| 9
|
7 . . 5 . . . . 2
. 3 8 1 . . 5 7 .
. 6 5 7 . . 3 . .
. . 1 . 4 . . . .
. . . . . 2 . 1 5
6 . . 8 5 1 . 2 .
8 4 2 6 . 5 . 3 .
1 9 7 4 8 3 . 5 6
3 5 6 2 1 . . 8 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
714539862238164579965728341521346798483972615679851423842695137197483256356217984 #1 Easy (246)
Full House: r8c7=2
Naked Single: r1c2=1
Naked Single: r6c2=7
Naked Single: r5c2=8
Full House: r4c2=2
Hidden Single: r3c9=1
Hidden Single: r1c5=3
Hidden Single: r4c1=5
Hidden Single: r7c7=1
Hidden Single: r3c6=8
Hidden Single: r4c9=8
Hidden Single: r1c7=8
Hidden Single: r4c4=3
Full House: r5c4=9
Naked Single: r5c1=4
Naked Single: r5c3=3
Full House: r6c3=9
Full House: r1c3=4
Naked Single: r6c7=4
Full House: r6c9=3
Hidden Single: r1c8=6
Full House: r1c6=9
Naked Single: r4c8=9
Full House: r3c8=4
Full House: r2c9=9
Naked Single: r3c5=2
Full House: r3c1=9
Full House: r2c1=2
Naked Single: r9c6=7
Full House: r7c5=9
Full House: r7c9=7
Full House: r9c9=4
Full House: r9c7=9
Naked Single: r2c5=6
Full House: r2c6=4
Full House: r4c6=6
Full House: r5c5=7
Full House: r4c7=7
Full House: r5c7=6
|
easy
| null |
normal_sudoku_2352
|
..352.486.25.8419...46..2..54.......2....5...8....2.1.952476831...2319....7958624
|
193527486625384197784619253541893762279165348836742519952476831468231975317958624
|
normal_sudoku_2352
|
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
| 9
|
. . 3 5 2 . 4 8 6
. 2 5 . 8 4 1 9 .
. . 4 6 . . 2 . .
5 4 . . . . . . .
2 . . . . 5 . . .
8 . . . . 2 . 1 .
9 5 2 4 7 6 8 3 1
. . . 2 3 1 9 . .
. . 7 9 5 8 6 2 4
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
193527486625384197784619253541893762279165348836742519952476831468231975317958624 #1 Easy (196)
Hidden Single: r2c1=6
Naked Single: r8c1=4
Hidden Single: r3c2=8
Naked Single: r8c2=6
Naked Single: r8c3=8
Hidden Single: r9c1=3
Full House: r9c2=1
Hidden Single: r3c5=1
Naked Single: r3c1=7
Full House: r1c1=1
Full House: r1c2=9
Full House: r1c6=7
Naked Single: r3c8=5
Naked Single: r2c4=3
Full House: r2c9=7
Full House: r3c9=3
Full House: r3c6=9
Full House: r4c6=3
Naked Single: r8c8=7
Full House: r8c9=5
Naked Single: r6c4=7
Naked Single: r4c7=7
Naked Single: r4c8=6
Full House: r5c8=4
Naked Single: r6c9=9
Naked Single: r6c2=3
Full House: r5c2=7
Naked Single: r5c7=3
Full House: r6c7=5
Naked Single: r4c5=9
Naked Single: r5c9=8
Full House: r4c9=2
Naked Single: r6c3=6
Full House: r6c5=4
Full House: r5c5=6
Naked Single: r4c3=1
Full House: r4c4=8
Full House: r5c4=1
Full House: r5c3=9
|
easy
| null |
normal_sudoku_777
|
716..45839538..247482.736193....5..6.9..3..2.2687..3...2....9..6...5...1.3...74.2
|
716924583953861247482573619374285196591436728268719354127648935649352871835197462
|
normal_sudoku_777
|
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
| 9
|
7 1 6 . . 4 5 8 3
9 5 3 8 . . 2 4 7
4 8 2 . 7 3 6 1 9
3 . . . . 5 . . 6
. 9 . . 3 . . 2 .
2 6 8 7 . . 3 . .
. 2 . . . . 9 . .
6 . . . 5 . . . 1
. 3 . . . 7 4 . 2
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
716924583953861247482573619374285196591436728268719354127648935649352871835197462 #1 Easy (186)
Full House: r3c4=5
Hidden Single: r8c6=2
Hidden Single: r8c7=8
Naked Single: r7c9=5
Naked Single: r6c9=4
Full House: r5c9=8
Naked Single: r9c8=6
Hidden Single: r6c6=9
Naked Single: r6c5=1
Full House: r6c8=5
Naked Single: r2c5=6
Full House: r2c6=1
Naked Single: r5c6=6
Full House: r7c6=8
Naked Single: r5c4=4
Naked Single: r7c1=1
Naked Single: r7c5=4
Naked Single: r9c5=9
Naked Single: r4c4=2
Full House: r4c5=8
Full House: r1c5=2
Full House: r1c4=9
Naked Single: r5c1=5
Full House: r9c1=8
Naked Single: r7c3=7
Naked Single: r8c4=3
Naked Single: r9c3=5
Full House: r9c4=1
Full House: r7c4=6
Full House: r7c8=3
Full House: r8c8=7
Full House: r4c8=9
Naked Single: r5c3=1
Full House: r5c7=7
Full House: r4c7=1
Naked Single: r8c2=4
Full House: r4c2=7
Full House: r4c3=4
Full House: r8c3=9
|
easy
| null |
normal_sudoku_4743
|
.2.9867516.71243899..3756247..41...28..6...7...9.37....3..51..85.....4....684..3.
|
324986751657124389981375624763418592845692173219537846432751968598263417176849235
|
normal_sudoku_4743
|
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
| 9
|
. 2 . 9 8 6 7 5 1
6 . 7 1 2 4 3 8 9
9 . . 3 7 5 6 2 4
7 . . 4 1 . . . 2
8 . . 6 . . . 7 .
. . 9 . 3 7 . . .
. 3 . . 5 1 . . 8
5 . . . . . 4 . .
. . 6 8 4 . . 3 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
324986751657124389981375624763418592845692173219537846432751968598263417176849235 #1 Easy (156)
Full House: r2c2=5
Naked Single: r5c5=9
Full House: r8c5=6
Naked Single: r4c2=6
Naked Single: r4c6=8
Naked Single: r5c6=2
Full House: r6c4=5
Naked Single: r8c9=7
Naked Single: r4c8=9
Naked Single: r9c6=9
Full House: r8c6=3
Naked Single: r6c9=6
Naked Single: r8c4=2
Full House: r7c4=7
Naked Single: r9c9=5
Full House: r5c9=3
Naked Single: r4c7=5
Full House: r4c3=3
Naked Single: r7c8=6
Naked Single: r8c8=1
Full House: r6c8=4
Naked Single: r5c7=1
Full House: r6c7=8
Naked Single: r1c3=4
Full House: r1c1=3
Naked Single: r8c3=8
Full House: r8c2=9
Naked Single: r9c7=2
Full House: r7c7=9
Naked Single: r6c2=1
Full House: r6c1=2
Naked Single: r5c2=4
Full House: r5c3=5
Naked Single: r7c3=2
Full House: r3c3=1
Full House: r3c2=8
Full House: r9c2=7
Full House: r9c1=1
Full House: r7c1=4
|
easy
| null |
normal_sudoku_3338
|
..3.92176...8.72...7...358.3.9..4....6.3254972.79863.1..62.97.57...68923.....1...
|
583492176691857234472613589359174862168325497247986351836249715714568923925731648
|
normal_sudoku_3338
|
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
| 9
|
. . 3 . 9 2 1 7 6
. . . 8 . 7 2 . .
. 7 . . . 3 5 8 .
3 . 9 . . 4 . . .
. 6 . 3 2 5 4 9 7
2 . 7 9 8 6 3 . 1
. . 6 2 . 9 7 . 5
7 . . . 6 8 9 2 3
. . . . . 1 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
583492176691857234472613589359174862168325497247986351836249715714568923925731648 #1 Easy (166)
Naked Single: r6c8=5
Full House: r6c2=4
Naked Single: r4c8=6
Naked Single: r4c7=8
Full House: r4c9=2
Full House: r9c7=6
Naked Single: r9c8=4
Naked Single: r2c8=3
Full House: r7c8=1
Full House: r9c9=8
Hidden Single: r3c3=2
Naked Single: r9c3=5
Naked Single: r8c2=1
Naked Single: r9c1=9
Naked Single: r9c4=7
Naked Single: r4c2=5
Naked Single: r8c3=4
Full House: r8c4=5
Naked Single: r4c4=1
Full House: r4c5=7
Naked Single: r9c5=3
Full House: r7c5=4
Full House: r9c2=2
Naked Single: r1c2=8
Naked Single: r2c2=9
Full House: r7c2=3
Full House: r7c1=8
Naked Single: r2c3=1
Full House: r5c3=8
Full House: r5c1=1
Naked Single: r1c4=4
Full House: r1c1=5
Full House: r3c4=6
Naked Single: r3c5=1
Full House: r2c5=5
Naked Single: r2c9=4
Full House: r2c1=6
Full House: r3c1=4
Full House: r3c9=9
|
easy
| null |
normal_sudoku_1103
|
.8...5..7......493.....481.1.58......3..921....41...3...34...........78.7.1..9...
|
489315627517268493362974815125843976638792154974156238893427561246531789751689342
|
puzzles1_unbiased
|
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
| 9
|
. 8 . . . 5 . . 7
. . . . . . 4 9 3
. . . . . 4 8 1 .
1 . 5 8 . . . . .
. 3 . . 9 2 1 . .
. . 4 1 . . . 3 .
. . 3 4 . . . . .
. . . . . . 7 8 .
7 . 1 . . 9 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
489315627517268493362974815125843976638792154974156238893427561246531789751689342 #1 Easy (490)
Hidden Single: r3c9=5
Hidden Single: r1c1=4
Hidden Single: r4c5=4
Hidden Single: r9c7=3
Hidden Single: r1c5=1
Hidden Single: r2c2=1
Hidden Single: r5c3=8
Naked Single: r5c1=6
Naked Single: r5c9=4
Hidden Single: r7c1=8
Hidden Single: r9c5=8
Hidden Single: r3c1=3
Hidden Single: r4c6=3
Hidden Single: r1c4=3
Hidden Single: r2c1=5
Hidden Single: r6c9=8
Hidden Single: r9c8=4
Hidden Single: r8c2=4
Hidden Single: r2c6=8
Hidden Single: r8c5=3
Hidden Single: r1c3=9
Hidden Single: r3c4=9
Hidden Single: r8c4=5
Naked Single: r5c4=7
Full House: r5c8=5
Naked Single: r6c6=6
Full House: r6c5=5
Naked Single: r8c6=1
Full House: r7c6=7
Hidden Single: r9c2=5
Hidden Single: r4c8=7
Hidden Single: r6c2=7
Hidden Single: r7c7=5
Hidden Single: r7c9=1
Hidden Single: r7c2=9
Naked Single: r4c2=2
Full House: r3c2=6
Full House: r6c1=9
Full House: r8c1=2
Full House: r6c7=2
Full House: r8c3=6
Full House: r8c9=9
Naked Single: r1c7=6
Full House: r1c8=2
Full House: r4c7=9
Full House: r4c9=6
Full House: r7c8=6
Full House: r9c9=2
Full House: r7c5=2
Full House: r9c4=6
Full House: r2c4=2
Naked Single: r3c5=7
Full House: r2c5=6
Full House: r2c3=7
Full House: r3c3=2
|
easy
|
Basic 9x9 Sudoku 1103
|
normal_sudoku_4890
|
2.....1...16.2..54.7.51..6.527.3..9.6819725.3.9...5..11....87....8.4.....6.3...1.
|
235496187916827354874513962527134896681972543493685271149268735358741629762359418
|
normal_sudoku_4890
|
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
| 9
|
2 . . . . . 1 . .
. 1 6 . 2 . . 5 4
. 7 . 5 1 . . 6 .
5 2 7 . 3 . . 9 .
6 8 1 9 7 2 5 . 3
. 9 . . . 5 . . 1
1 . . . . 8 7 . .
. . 8 . 4 . . . .
. 6 . 3 . . . 1 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
235496187916827354874513962527134896681972543493685271149268735358741629762359418 #1 Easy (314)
Full House: r5c8=4
Hidden Single: r6c8=7
Hidden Single: r1c9=7
Hidden Single: r9c7=4
Hidden Single: r6c7=2
Hidden Single: r1c8=8
Hidden Single: r9c9=8
Naked Single: r4c9=6
Full House: r4c7=8
Hidden Single: r3c9=2
Hidden Single: r6c5=8
Hidden Single: r2c4=8
Hidden Single: r3c1=8
Hidden Single: r9c3=2
Hidden Single: r8c7=6
Hidden Single: r6c4=6
Naked Single: r1c4=4
Naked Single: r7c4=2
Naked Single: r4c4=1
Full House: r4c6=4
Full House: r8c4=7
Naked Single: r7c8=3
Full House: r8c8=2
Naked Single: r9c6=9
Naked Single: r3c6=3
Naked Single: r8c6=1
Naked Single: r9c1=7
Full House: r9c5=5
Full House: r7c5=6
Full House: r1c5=9
Naked Single: r1c6=6
Full House: r2c6=7
Naked Single: r3c7=9
Full House: r2c7=3
Full House: r3c3=4
Full House: r2c1=9
Naked Single: r6c3=3
Full House: r6c1=4
Full House: r8c1=3
Naked Single: r1c3=5
Full House: r1c2=3
Full House: r7c3=9
Naked Single: r8c2=5
Full House: r7c2=4
Full House: r7c9=5
Full House: r8c9=9
|
easy
| null |
normal_sudoku_1632
|
.81....7....8.91...5.........29854315483217969134672..2.5.7...98....3..71...9...4
|
381546972726839145459712863672985431548321796913467258265174389894253617137698524
|
normal_sudoku_1632
|
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
| 9
|
. 8 1 . . . . 7 .
. . . 8 . 9 1 . .
. 5 . . . . . . .
. . 2 9 8 5 4 3 1
5 4 8 3 2 1 7 9 6
9 1 3 4 6 7 2 . .
2 . 5 . 7 . . . 9
8 . . . . 3 . . 7
1 . . . 9 . . . 4
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
381546972726839145459712863672985431548321796913467258265174389894253617137698524 #1 Easy (274)
Hidden Single: r3c3=9
Hidden Single: r2c2=2
Hidden Single: r3c4=7
Hidden Single: r1c7=9
Hidden Single: r8c2=9
Hidden Single: r7c6=4
Hidden Single: r8c3=4
Hidden Single: r3c5=1
Naked Single: r8c5=5
Naked Single: r8c7=6
Hidden Single: r9c6=8
Hidden Single: r1c4=5
Hidden Single: r9c7=5
Naked Single: r9c8=2
Naked Single: r8c8=1
Full House: r8c4=2
Naked Single: r9c4=6
Full House: r7c4=1
Naked Single: r7c8=8
Full House: r7c7=3
Full House: r3c7=8
Full House: r7c2=6
Naked Single: r9c3=7
Full House: r2c3=6
Full House: r9c2=3
Full House: r4c2=7
Full House: r4c1=6
Naked Single: r6c8=5
Full House: r6c9=8
Naked Single: r2c8=4
Full House: r3c8=6
Naked Single: r2c5=3
Full House: r1c5=4
Naked Single: r3c6=2
Full House: r1c6=6
Naked Single: r2c1=7
Full House: r2c9=5
Naked Single: r1c1=3
Full House: r1c9=2
Full House: r3c9=3
Full House: r3c1=4
|
easy
| null |
normal_sudoku_1491
|
.34.625.78..1.....9....7...4137586.96952....1728619354......412..6....38.4..8..65
|
134862597867195243952347186413758629695234871728619354389576412576421938241983765
|
normal_sudoku_1491
|
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
| 9
|
. 3 4 . 6 2 5 . 7
8 . . 1 . . . . .
9 . . . . 7 . . .
4 1 3 7 5 8 6 . 9
6 9 5 2 . . . . 1
7 2 8 6 1 9 3 5 4
. . . . . . 4 1 2
. . 6 . . . . 3 8
. 4 . . 8 . . 6 5
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
134862597867195243952347186413758629695234871728619354389576412576421938241983765 #1 Easy (156)
Full House: r4c8=2
Naked Single: r1c1=1
Naked Single: r3c3=2
Naked Single: r2c3=7
Naked Single: r7c3=9
Full House: r9c3=1
Naked Single: r9c6=3
Naked Single: r5c6=4
Full House: r5c5=3
Naked Single: r7c4=5
Naked Single: r7c5=7
Naked Single: r9c1=2
Naked Single: r9c4=9
Full House: r9c7=7
Full House: r8c7=9
Naked Single: r2c6=5
Naked Single: r3c5=4
Naked Single: r7c1=3
Full House: r8c1=5
Naked Single: r7c6=6
Full House: r8c6=1
Full House: r7c2=8
Full House: r8c2=7
Naked Single: r1c4=8
Full House: r1c8=9
Naked Single: r8c4=4
Full House: r8c5=2
Full House: r2c5=9
Full House: r3c4=3
Naked Single: r5c7=8
Full House: r5c8=7
Naked Single: r2c7=2
Full House: r3c7=1
Naked Single: r2c2=6
Full House: r3c2=5
Naked Single: r3c8=8
Full House: r2c8=4
Full House: r3c9=6
Full House: r2c9=3
|
easy
| null |
normal_sudoku_436
|
...6.9..1.19..367.....1.3..26.5.....9.8..4....7..9.5.6.9..3...7735..2...8......43
|
387659421519423678642718395261587934958364712473291586194836257735142869826975143
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. . . 6 . 9 . . 1
. 1 9 . . 3 6 7 .
. . . . 1 . 3 . .
2 6 . 5 . . . . .
9 . 8 . . 4 . . .
. 7 . . 9 . 5 . 6
. 9 . . 3 . . . 7
7 3 5 . . 2 . . .
8 . . . . . . 4 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
387659421519423678642718395261587934958364712473291586194836257735142869826975143 #1 Medium (534)
Naked Single: r5c2=5
Naked Single: r9c2=2
Naked Single: r5c9=2
Hidden Single: r5c5=6
Hidden Single: r7c8=5
Hidden Single: r6c4=2
Hidden Single: r8c8=6
Hidden Single: r7c7=2
Hidden Single: r2c5=2
Hidden Single: r5c4=3
Naked Single: r5c8=1
Full House: r5c7=7
Locked Candidates Type 1 (Pointing): 1 in b5 => r79c6<>1
Locked Candidates Type 1 (Pointing): 4 in b6 => r4c3<>4
Locked Candidates Type 1 (Pointing): 4 in b7 => r7c4<>4
Locked Candidates Type 1 (Pointing): 8 in b9 => r8c45<>8
Naked Single: r8c5=4
Locked Candidates Type 2 (Claiming): 4 in c2 => r1c13,r23c1,r3c3<>4
Naked Single: r2c1=5
Naked Single: r1c1=3
Naked Single: r3c1=6
Hidden Single: r1c5=5
Naked Single: r9c5=7
Full House: r4c5=8
Naked Single: r6c6=1
Full House: r4c6=7
Naked Single: r6c1=4
Full House: r7c1=1
Naked Single: r3c6=8
Naked Single: r6c3=3
Full House: r4c3=1
Full House: r6c8=8
Naked Single: r7c4=8
Naked Single: r9c3=6
Full House: r7c3=4
Full House: r7c6=6
Full House: r9c6=5
Naked Single: r2c4=4
Full House: r2c9=8
Full House: r3c4=7
Naked Single: r3c2=4
Full House: r1c2=8
Naked Single: r1c8=2
Naked Single: r1c7=4
Full House: r1c3=7
Full House: r3c3=2
Naked Single: r8c9=9
Naked Single: r3c8=9
Full House: r3c9=5
Full House: r4c9=4
Full House: r4c8=3
Full House: r4c7=9
Naked Single: r8c4=1
Full House: r8c7=8
Full House: r9c7=1
Full House: r9c4=9
|
medium
|
Basic 9x9 Sudoku 436
|
normal_sudoku_2743
|
.82.45......9.837.9...16.....5..4.....8..9..6.73...9.........34.1..6..29.........
|
382745691461928375957316482695874213148239756273651948826197534714563829539482167
|
puzzles1_unbiased
|
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
| 9
|
. 8 2 . 4 5 . . .
. . . 9 . 8 3 7 .
9 . . . 1 6 . . .
. . 5 . . 4 . . .
. . 8 . . 9 . . 6
. 7 3 . . . 9 . .
. . . . . . . 3 4
. 1 . . 6 . . 2 9
. . . . . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
382745691461928375957316482695874213148239756273651948826197534714563829539482167 #1 Easy (314)
Naked Single: r2c5=2
Naked Single: r1c9=1
Naked Single: r1c7=6
Naked Single: r2c9=5
Naked Single: r1c8=9
Hidden Single: r4c2=9
Hidden Single: r4c9=3
Hidden Single: r2c3=1
Hidden Single: r9c8=6
Hidden Single: r3c2=5
Hidden Single: r9c9=7
Hidden Single: r7c3=6
Naked Single: r7c2=2
Naked Single: r5c2=4
Naked Single: r2c2=6
Full House: r9c2=3
Full House: r2c1=4
Naked Single: r3c3=7
Full House: r1c1=3
Full House: r1c4=7
Full House: r3c4=3
Naked Single: r8c3=4
Full House: r9c3=9
Hidden Single: r7c5=9
Hidden Single: r3c7=4
Naked Single: r3c8=8
Full House: r3c9=2
Full House: r6c9=8
Naked Single: r4c8=1
Naked Single: r6c5=5
Naked Single: r5c8=5
Full House: r6c8=4
Naked Single: r9c5=8
Naked Single: r4c5=7
Full House: r5c5=3
Naked Single: r8c4=5
Naked Single: r9c1=5
Naked Single: r4c7=2
Full House: r5c7=7
Naked Single: r7c4=1
Naked Single: r8c7=8
Naked Single: r9c7=1
Full House: r7c7=5
Naked Single: r4c1=6
Full House: r4c4=8
Naked Single: r5c4=2
Full House: r5c1=1
Full House: r6c1=2
Naked Single: r7c6=7
Full House: r7c1=8
Full House: r8c1=7
Full House: r8c6=3
Naked Single: r9c6=2
Full House: r6c6=1
Full House: r6c4=6
Full House: r9c4=4
|
easy
|
Basic 9x9 Sudoku 2743
|
normal_sudoku_1409
|
74..9.3511....3.866.3..1..28....2..3.....7814..7..4.295..12..3...1...2.5236..519.
|
742698351159243786683751942864912573925367814317584629598126437471839265236475198
|
normal_sudoku_1409
|
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
| 9
|
7 4 . . 9 . 3 5 1
1 . . . . 3 . 8 6
6 . 3 . . 1 . . 2
8 . . . . 2 . . 3
. . . . . 7 8 1 4
. . 7 . . 4 . 2 9
5 . . 1 2 . . 3 .
. . 1 . . . 2 . 5
2 3 6 . . 5 1 9 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
742698351159243786683751942864912573925367814317584629598126437471839265236475198 #1 Easy (222)
Naked Single: r6c1=3
Naked Single: r5c1=9
Full House: r8c1=4
Hidden Single: r4c3=4
Hidden Single: r4c4=9
Hidden Single: r7c7=4
Hidden Single: r3c8=4
Hidden Single: r7c6=6
Naked Single: r1c6=8
Full House: r8c6=9
Naked Single: r1c3=2
Full House: r1c4=6
Naked Single: r5c3=5
Naked Single: r2c3=9
Full House: r7c3=8
Naked Single: r5c4=3
Naked Single: r2c2=5
Full House: r3c2=8
Naked Single: r2c7=7
Full House: r3c7=9
Naked Single: r7c9=7
Full House: r7c2=9
Full House: r8c2=7
Full House: r9c9=8
Full House: r8c8=6
Full House: r4c8=7
Naked Single: r5c5=6
Full House: r5c2=2
Naked Single: r2c5=4
Full House: r2c4=2
Naked Single: r8c4=8
Full House: r8c5=3
Naked Single: r9c5=7
Full House: r9c4=4
Naked Single: r6c4=5
Full House: r3c4=7
Full House: r3c5=5
Naked Single: r4c5=1
Full House: r6c5=8
Naked Single: r6c7=6
Full House: r4c7=5
Full House: r4c2=6
Full House: r6c2=1
|
easy
| null |
normal_sudoku_6339
|
4.5.1...9.6.......2.1..6..4.5..4...6....28.9...97..3........8....76...31.1..5...2
|
475213689968574213231986574853149726746328195129765348692431857587692431314857962
|
puzzles4_forum_hardest_1905
|
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
| 9
|
4 . 5 . 1 . . . 9
. 6 . . . . . . .
2 . 1 . . 6 . . 4
. 5 . . 4 . . . 6
. . . . 2 8 . 9 .
. . 9 7 . . 3 . .
. . . . . . 8 . .
. . 7 6 . . . 3 1
. 1 . . 5 . . . 2
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
475213689968574213231986574853149726746328195129765348692431857587692431314857962 #1 Easy (260)
Naked Single: r6c5=6
Hidden Single: r2c9=3
Naked Single: r2c3=8
Hidden Single: r6c9=8
Naked Single: r6c1=1
Naked Single: r6c6=5
Hidden Single: r4c1=8
Hidden Single: r8c2=8
Naked Single: r8c5=9
Naked Single: r2c5=7
Naked Single: r8c1=5
Naked Single: r2c1=9
Naked Single: r7c5=3
Full House: r3c5=8
Naked Single: r8c7=4
Full House: r8c6=2
Naked Single: r7c1=6
Naked Single: r1c6=3
Naked Single: r2c6=4
Naked Single: r9c1=3
Full House: r5c1=7
Naked Single: r1c2=7
Full House: r3c2=3
Naked Single: r1c4=2
Naked Single: r9c6=7
Naked Single: r9c3=4
Naked Single: r5c9=5
Full House: r7c9=7
Naked Single: r5c2=4
Naked Single: r1c7=6
Full House: r1c8=8
Naked Single: r2c4=5
Full House: r3c4=9
Naked Single: r7c6=1
Full House: r4c6=9
Naked Single: r9c8=6
Naked Single: r7c3=2
Full House: r7c2=9
Full House: r6c2=2
Full House: r6c8=4
Naked Single: r9c4=8
Full House: r9c7=9
Full House: r7c8=5
Full House: r7c4=4
Naked Single: r5c7=1
Naked Single: r4c3=3
Full House: r5c3=6
Full House: r5c4=3
Full House: r4c4=1
Naked Single: r3c8=7
Full House: r3c7=5
Naked Single: r2c7=2
Full House: r2c8=1
Full House: r4c8=2
Full House: r4c7=7
|
easy
|
Basic 9x9 Sudoku 6339
|
normal_sudoku_1982
|
.26.75981.5..8.....8.9..4..27...9....49....12.632...9..3.8971..718546329.9.132.6.
|
426375981951684273387921456275419638849763512163258794632897145718546329594132867
|
normal_sudoku_1982
|
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
| 9
|
. 2 6 . 7 5 9 8 1
. 5 . . 8 . . . .
. 8 . 9 . . 4 . .
2 7 . . . 9 . . .
. 4 9 . . . . 1 2
. 6 3 2 . . . 9 .
. 3 . 8 9 7 1 . .
7 1 8 5 4 6 3 2 9
. 9 . 1 3 2 . 6 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
426375981951684273387921456275419638849763512163258794632897145718546329594132867 #1 Easy (226)
Hidden Single: r2c1=9
Hidden Single: r5c4=7
Hidden Single: r2c7=2
Hidden Single: r7c3=2
Hidden Single: r3c5=2
Hidden Single: r7c1=6
Hidden Single: r5c6=3
Naked Single: r3c6=1
Naked Single: r2c6=4
Full House: r6c6=8
Naked Single: r3c1=3
Naked Single: r3c3=7
Naked Single: r1c4=3
Full House: r1c1=4
Full House: r2c3=1
Full House: r2c4=6
Full House: r4c4=4
Naked Single: r3c8=5
Full House: r3c9=6
Naked Single: r9c1=5
Full House: r9c3=4
Full House: r4c3=5
Naked Single: r4c8=3
Naked Single: r7c8=4
Full House: r2c8=7
Full House: r7c9=5
Full House: r2c9=3
Naked Single: r5c1=8
Full House: r6c1=1
Naked Single: r4c9=8
Naked Single: r6c5=5
Naked Single: r4c7=6
Full House: r4c5=1
Full House: r5c5=6
Full House: r5c7=5
Naked Single: r9c9=7
Full House: r6c9=4
Full House: r6c7=7
Full House: r9c7=8
|
easy
| null |
normal_sudoku_1497
|
149.2.7..7251.9.84368...219.1...7.92....124.72...86..1.8...3.2.9..2..1....2..1.7.
|
149628753725139684368754219516347892893512467274986531681473925937265148452891376
|
normal_sudoku_1497
|
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
| 9
|
1 4 9 . 2 . 7 . .
7 2 5 1 . 9 . 8 4
3 6 8 . . . 2 1 9
. 1 . . . 7 . 9 2
. . . . 1 2 4 . 7
2 . . . 8 6 . . 1
. 8 . . . 3 . 2 .
9 . . 2 . . 1 . .
. . 2 . . 1 . 7 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
149628753725139684368754219516347892893512467274986531681473925937265148452891376 #1 Medium (308)
Hidden Single: r4c7=8
Hidden Single: r5c1=8
Hidden Single: r7c3=1
Hidden Single: r8c8=4
Hidden Single: r5c8=6
Naked Single: r5c3=3
Hidden Single: r3c6=4
Locked Candidates Type 1 (Pointing): 5 in b3 => r1c46<>5
Naked Single: r1c6=8
Full House: r8c6=5
Hidden Single: r9c4=8
Hidden Single: r8c9=8
Hidden Single: r8c2=3
Naked Single: r9c2=5
Naked Single: r5c2=9
Full House: r5c4=5
Full House: r6c2=7
Naked Single: r3c4=7
Full House: r3c5=5
Naked Single: r6c3=4
Naked Single: r4c3=6
Full House: r4c1=5
Full House: r8c3=7
Full House: r8c5=6
Naked Single: r2c5=3
Full House: r1c4=6
Full House: r2c7=6
Naked Single: r4c5=4
Full House: r4c4=3
Full House: r6c4=9
Full House: r7c4=4
Naked Single: r9c5=9
Full House: r7c5=7
Naked Single: r7c1=6
Full House: r9c1=4
Naked Single: r9c7=3
Full House: r9c9=6
Naked Single: r7c9=5
Full House: r1c9=3
Full House: r7c7=9
Full House: r6c7=5
Full House: r1c8=5
Full House: r6c8=3
|
medium
| null |
normal_sudoku_1695
|
.9.1..8...5.28.46..3.....71.7.31.62...24.835..........3...9...5.6..27....4.8.....
|
496175832157283469238946571574319628912468357683752914321694785869527143745831296
|
puzzles1_unbiased
|
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
| 9
|
. 9 . 1 . . 8 . .
. 5 . 2 8 . 4 6 .
. 3 . . . . . 7 1
. 7 . 3 1 . 6 2 .
. . 2 4 . 8 3 5 .
. . . . . . . . .
3 . . . 9 . . . 5
. 6 . . 2 7 . . .
. 4 . 8 . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
496175832157283469238946571574319628912468357683752914321694785869527143745831296 #1 Easy (208)
Naked Single: r1c8=3
Naked Single: r5c2=1
Naked Single: r7c4=6
Naked Single: r8c4=5
Naked Single: r1c9=2
Naked Single: r2c9=9
Full House: r3c7=5
Naked Single: r6c2=8
Full House: r7c2=2
Naked Single: r3c4=9
Full House: r6c4=7
Naked Single: r9c5=3
Naked Single: r2c6=3
Naked Single: r5c9=7
Naked Single: r5c5=6
Full House: r5c1=9
Naked Single: r6c9=4
Naked Single: r9c6=1
Full House: r7c6=4
Naked Single: r9c9=6
Naked Single: r3c5=4
Naked Single: r6c5=5
Full House: r1c5=7
Naked Single: r4c9=8
Full House: r8c9=3
Naked Single: r9c8=9
Naked Single: r3c6=6
Full House: r1c6=5
Naked Single: r4c6=9
Full House: r6c6=2
Naked Single: r6c1=6
Naked Single: r6c8=1
Full House: r6c7=9
Full House: r6c3=3
Naked Single: r8c7=1
Naked Single: r3c3=8
Full House: r3c1=2
Naked Single: r1c1=4
Full House: r1c3=6
Naked Single: r7c8=8
Full House: r8c8=4
Naked Single: r7c7=7
Full House: r7c3=1
Full House: r9c7=2
Naked Single: r8c1=8
Full House: r8c3=9
Naked Single: r4c1=5
Full House: r4c3=4
Naked Single: r2c3=7
Full House: r2c1=1
Full House: r9c1=7
Full House: r9c3=5
|
easy
|
Basic 9x9 Sudoku 1695
|
normal_sudoku_1594
|
...48..9.....738...9...2....1.....7...9...3.66..7...5.......72.2..63....3.52.94..
|
537481692126973845498562137812356974759124386643798251961845723284637519375219468
|
puzzles1_unbiased
|
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
| 9
|
. . . 4 8 . . 9 .
. . . . 7 3 8 . .
. 9 . . . 2 . . .
. 1 . . . . . 7 .
. . 9 . . . 3 . 6
6 . . 7 . . . 5 .
. . . . . . 7 2 .
2 . . 6 3 . . . .
3 . 5 2 . 9 4 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
537481692126973845498562137812356974759124386643798251961845723284637519375219468 #1 Medium (370)
Naked Single: r9c5=1
Naked Single: r9c9=8
Naked Single: r8c8=1
Naked Single: r9c8=6
Full House: r9c2=7
Naked Single: r2c8=4
Naked Single: r3c8=3
Full House: r5c8=8
Hidden Single: r2c4=9
Hidden Single: r4c4=3
Hidden Single: r7c9=3
Hidden Single: r7c1=9
Hidden Single: r8c6=7
Hidden Single: r5c1=7
Hidden Single: r7c4=8
Hidden Single: r7c3=1
Hidden Single: r7c2=6
Hidden Single: r2c3=6
Locked Pair: 1,5 in r12c1 => r3c1<>1, r12c2,r34c1<>5
Naked Single: r2c2=2
Naked Single: r1c2=3
Naked Single: r1c3=7
Hidden Single: r5c2=5
Naked Single: r5c4=1
Full House: r3c4=5
Naked Single: r5c6=4
Full House: r5c5=2
Naked Single: r3c5=6
Full House: r1c6=1
Naked Single: r6c6=8
Naked Single: r7c6=5
Full House: r4c6=6
Full House: r7c5=4
Naked Single: r6c5=9
Full House: r4c5=5
Naked Single: r3c7=1
Naked Single: r1c1=5
Naked Single: r6c2=4
Full House: r8c2=8
Full House: r8c3=4
Naked Single: r2c9=5
Full House: r2c1=1
Naked Single: r3c9=7
Naked Single: r6c7=2
Naked Single: r1c9=2
Full House: r1c7=6
Naked Single: r4c1=8
Full House: r3c1=4
Full House: r3c3=8
Naked Single: r8c9=9
Full House: r8c7=5
Full House: r4c7=9
Naked Single: r6c3=3
Full House: r6c9=1
Full House: r4c3=2
Full House: r4c9=4
|
medium
|
Basic 9x9 Sudoku 1594
|
normal_sudoku_1453
|
..63.......7.5.2........841.4.26.....29....5.5.34........9.7....84..3..27.......4
|
416382597897154263352679841148265739629731458573498126261947385984513672735826914
|
puzzles1_unbiased
|
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
| 9
|
. . 6 3 . . . . .
. . 7 . 5 . 2 . .
. . . . . . 8 4 1
. 4 . 2 6 . . . .
. 2 9 . . . . 5 .
5 . 3 4 . . . . .
. . . 9 . 7 . . .
. 8 4 . . 3 . . 2
7 . . . . . . . 4
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
416382597897154263352679841148265739629731458573498126261947385984513672735826914 #1 Easy (364)
Naked Single: r8c5=1
Hidden Single: r4c6=5
Hidden Single: r4c3=8
Naked Single: r4c1=1
Naked Single: r5c1=6
Full House: r6c2=7
Naked Single: r8c1=9
Hidden Single: r5c5=3
Hidden Single: r6c8=2
Hidden Single: r5c7=4
Hidden Single: r7c5=4
Hidden Single: r5c4=7
Naked Single: r3c4=6
Naked Single: r5c9=8
Full House: r5c6=1
Naked Single: r8c4=5
Naked Single: r9c4=8
Full House: r2c4=1
Naked Single: r9c5=2
Full House: r9c6=6
Hidden Single: r6c7=1
Hidden Single: r3c5=7
Hidden Single: r7c8=8
Hidden Single: r1c2=1
Hidden Single: r7c2=6
Hidden Single: r6c9=6
Hidden Single: r9c8=1
Naked Single: r9c3=5
Naked Single: r3c3=2
Full House: r7c3=1
Naked Single: r9c2=3
Full House: r7c1=2
Full House: r9c7=9
Naked Single: r3c1=3
Naked Single: r3c6=9
Full House: r3c2=5
Full House: r2c2=9
Naked Single: r1c5=8
Full House: r6c5=9
Full House: r6c6=8
Naked Single: r2c9=3
Naked Single: r1c1=4
Full House: r2c1=8
Naked Single: r2c6=4
Full House: r2c8=6
Full House: r1c6=2
Naked Single: r7c9=5
Full House: r7c7=3
Naked Single: r8c8=7
Full House: r8c7=6
Naked Single: r4c7=7
Full House: r1c7=5
Naked Single: r1c8=9
Full House: r1c9=7
Full House: r4c9=9
Full House: r4c8=3
|
easy
|
Basic 9x9 Sudoku 1453
|
normal_sudoku_1933
|
.7.9813.2...37214.231564978.....7...7.3859....2..36.87.18.......9..1..23..2.....4
|
674981352859372146231564978186247539743859261925136487418623795597418623362795814
|
normal_sudoku_1933
|
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
| 9
|
. 7 . 9 8 1 3 . 2
. . . 3 7 2 1 4 .
2 3 1 5 6 4 9 7 8
. . . . . 7 . . .
7 . 3 8 5 9 . . .
. 2 . . 3 6 . 8 7
. 1 8 . . . . . .
. 9 . . 1 . . 2 3
. . 2 . . . . . 4
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
674981352859372146231564978186247539743859261925136487418623795597418623362795814 #1 Easy (218)
Naked Single: r9c5=9
Hidden Single: r5c7=2
Hidden Single: r4c8=3
Hidden Single: r8c3=7
Hidden Single: r9c8=1
Naked Single: r5c8=6
Naked Single: r1c8=5
Full House: r2c9=6
Full House: r7c8=9
Naked Single: r5c2=4
Full House: r5c9=1
Naked Single: r7c9=5
Full House: r4c9=9
Naked Single: r7c6=3
Hidden Single: r1c3=4
Full House: r1c1=6
Naked Single: r7c1=4
Naked Single: r7c5=2
Full House: r4c5=4
Naked Single: r8c1=5
Naked Single: r4c7=5
Full House: r6c7=4
Naked Single: r6c4=1
Full House: r4c4=2
Naked Single: r8c6=8
Full House: r9c6=5
Naked Single: r9c1=3
Full House: r9c2=6
Naked Single: r4c3=6
Naked Single: r6c1=9
Full House: r6c3=5
Full House: r2c3=9
Naked Single: r8c7=6
Full House: r8c4=4
Naked Single: r4c2=8
Full House: r2c2=5
Full House: r2c1=8
Full House: r4c1=1
Naked Single: r9c4=7
Full House: r7c4=6
Full House: r7c7=7
Full House: r9c7=8
|
easy
| null |
normal_sudoku_1836
|
7.5.6..982....7.639.6.....44986.1...157...3863628759415...1....8...9....6..2.8...
|
745163298281947563936582174498631752157429386362875941574316829823794615619258437
|
normal_sudoku_1836
|
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
| 9
|
7 . 5 . 6 . . 9 8
2 . . . . 7 . 6 3
9 . 6 . . . . . 4
4 9 8 6 . 1 . . .
1 5 7 . . . 3 8 6
3 6 2 8 7 5 9 4 1
5 . . . 1 . . . .
8 . . . 9 . . . .
6 . . 2 . 8 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
745163298281947563936582174498631752157429386362875941574316829823794615619258437 #1 Easy (228)
Hidden Single: r4c5=3
Hidden Single: r2c4=9
Naked Single: r5c4=4
Naked Single: r5c5=2
Full House: r5c6=9
Hidden Single: r7c7=8
Hidden Single: r7c6=6
Hidden Single: r8c7=6
Hidden Single: r9c7=4
Naked Single: r9c5=5
Naked Single: r3c5=8
Full House: r2c5=4
Naked Single: r2c3=1
Naked Single: r2c2=8
Full House: r2c7=5
Naked Single: r3c2=3
Full House: r1c2=4
Naked Single: r3c6=2
Naked Single: r1c6=3
Full House: r8c6=4
Naked Single: r1c4=1
Full House: r1c7=2
Full House: r3c4=5
Naked Single: r8c3=3
Naked Single: r4c7=7
Full House: r3c7=1
Full House: r3c8=7
Naked Single: r8c4=7
Full House: r7c4=3
Naked Single: r9c3=9
Full House: r7c3=4
Naked Single: r7c8=2
Naked Single: r9c9=7
Naked Single: r4c8=5
Full House: r4c9=2
Naked Single: r7c2=7
Full House: r7c9=9
Full House: r8c9=5
Naked Single: r9c2=1
Full House: r8c2=2
Full House: r8c8=1
Full House: r9c8=3
|
easy
| null |
normal_sudoku_3575
|
..9..1..6.6....1..1.4....7.721...369983..2451..69138276..13.78....8.6.15.1..576.3
|
879321546265794138134568972721485369983672451546913827652139784397846215418257693
|
normal_sudoku_3575
|
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
| 9
|
. . 9 . . 1 . . 6
. 6 . . . . 1 . .
1 . 4 . . . . 7 .
7 2 1 . . . 3 6 9
9 8 3 . . 2 4 5 1
. . 6 9 1 3 8 2 7
6 . . 1 3 . 7 8 .
. . . 8 . 6 . 1 5
. 1 . . 5 7 6 . 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
879321546265794138134568972721485369983672451546913827652139784397846215418257693 #1 Easy (166)
Hidden Single: r9c8=9
Naked Single: r8c7=2
Full House: r7c9=4
Naked Single: r1c7=5
Full House: r3c7=9
Naked Single: r8c3=7
Naked Single: r7c6=9
Naked Single: r7c2=5
Full House: r7c3=2
Naked Single: r8c5=4
Full House: r9c4=2
Naked Single: r3c2=3
Naked Single: r6c2=4
Full House: r6c1=5
Naked Single: r9c3=8
Full House: r2c3=5
Full House: r9c1=4
Naked Single: r4c5=8
Naked Single: r8c1=3
Full House: r8c2=9
Full House: r1c2=7
Naked Single: r1c5=2
Naked Single: r1c1=8
Full House: r2c1=2
Naked Single: r3c5=6
Naked Single: r2c9=8
Full House: r3c9=2
Naked Single: r3c4=5
Full House: r3c6=8
Naked Single: r5c5=7
Full House: r2c5=9
Full House: r5c4=6
Naked Single: r2c6=4
Full House: r4c6=5
Full House: r4c4=4
Naked Single: r1c4=3
Full House: r1c8=4
Full House: r2c8=3
Full House: r2c4=7
|
easy
| null |
normal_sudoku_2909
|
85...47....3.564.....9...5.391...6...87..2..1.2..3..7.2..6.8...9.8.......7.59..4.
|
859314762713256489462987153391875624587462391624139875235648917948721536176593248
|
puzzles4_forum_hardest_1905
|
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
| 9
|
8 5 . . . 4 7 . .
. . 3 . 5 6 4 . .
. . . 9 . . . 5 .
3 9 1 . . . 6 . .
. 8 7 . . 2 . . 1
. 2 . . 3 . . 7 .
2 . . 6 . 8 . . .
9 . 8 . . . . . .
. 7 . 5 9 . . 4 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
859314762713256489462987153391875624587462391624139875235648917948721536176593248 #1 Easy (274)
Naked Single: r2c2=1
Naked Single: r5c4=4
Naked Single: r9c3=6
Naked Single: r2c1=7
Naked Single: r5c5=6
Naked Single: r9c1=1
Naked Single: r5c1=5
Naked Single: r9c6=3
Naked Single: r6c3=4
Full House: r6c1=6
Full House: r3c1=4
Naked Single: r3c3=2
Naked Single: r7c3=5
Full House: r1c3=9
Full House: r3c2=6
Hidden Single: r6c6=9
Hidden Single: r4c9=4
Hidden Single: r1c4=3
Hidden Single: r6c4=1
Hidden Single: r4c6=5
Hidden Single: r4c8=2
Hidden Single: r2c8=8
Naked Single: r2c4=2
Full House: r2c9=9
Naked Single: r3c9=3
Naked Single: r1c5=1
Naked Single: r8c4=7
Full House: r4c4=8
Full House: r4c5=7
Naked Single: r3c7=1
Naked Single: r7c9=7
Naked Single: r1c8=6
Full House: r1c9=2
Naked Single: r3c6=7
Full House: r8c6=1
Full House: r3c5=8
Naked Single: r7c5=4
Full House: r8c5=2
Naked Single: r9c9=8
Full House: r9c7=2
Naked Single: r8c8=3
Naked Single: r7c2=3
Full House: r8c2=4
Naked Single: r6c9=5
Full House: r6c7=8
Full House: r8c9=6
Full House: r8c7=5
Naked Single: r5c8=9
Full House: r5c7=3
Full House: r7c7=9
Full House: r7c8=1
|
easy
|
Basic 9x9 Sudoku 2909
|
normal_sudoku_3381
|
7....498...4.7...2.8....74..5..4682..621..43.4...2...7...419356..56..174641.5.298
|
726534981314978562589261743157346829862197435493825617278419356935682174641753298
|
normal_sudoku_3381
|
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
| 9
|
7 . . . . 4 9 8 .
. . 4 . 7 . . . 2
. 8 . . . . 7 4 .
. 5 . . 4 6 8 2 .
. 6 2 1 . . 4 3 .
4 . . . 2 . . . 7
. . . 4 1 9 3 5 6
. . 5 6 . . 1 7 4
6 4 1 . 5 . 2 9 8
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
726534981314978562589261743157346829862197435493825617278419356935682174641753298 #1 Easy (180)
Hidden Single: r5c6=7
Naked Single: r9c6=3
Full House: r9c4=7
Naked Single: r8c5=8
Full House: r8c6=2
Naked Single: r5c5=9
Naked Single: r4c4=3
Naked Single: r5c1=8
Full House: r5c9=5
Naked Single: r7c1=2
Naked Single: r6c7=6
Full House: r2c7=5
Naked Single: r7c2=7
Full House: r7c3=8
Naked Single: r6c8=1
Full House: r2c8=6
Full House: r4c9=9
Naked Single: r4c1=1
Full House: r4c3=7
Hidden Single: r1c4=5
Naked Single: r3c6=1
Naked Single: r6c4=8
Full House: r6c6=5
Full House: r2c6=8
Naked Single: r3c9=3
Full House: r1c9=1
Naked Single: r2c4=9
Full House: r3c4=2
Naked Single: r3c5=6
Full House: r1c5=3
Naked Single: r2c1=3
Full House: r2c2=1
Naked Single: r3c3=9
Full House: r3c1=5
Full House: r8c1=9
Full House: r8c2=3
Naked Single: r1c2=2
Full House: r1c3=6
Full House: r6c3=3
Full House: r6c2=9
|
easy
| null |
normal_sudoku_1259
|
267.53......9247364...76.257..6..51.81......7..4.173.9.7834..9.34.7.1.5.....6..73
|
267153948185924736493876125732689514819435267654217389578342691346791852921568473
|
normal_sudoku_1259
|
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
| 9
|
2 6 7 . 5 3 . . .
. . . 9 2 4 7 3 6
4 . . . 7 6 . 2 5
7 . . 6 . . 5 1 .
8 1 . . . . . . 7
. . 4 . 1 7 3 . 9
. 7 8 3 4 . . 9 .
3 4 . 7 . 1 . 5 .
. . . . 6 . . 7 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
267153948185924736493876125732689514819435267654217389578342691346791852921568473 #1 Easy (230)
Hidden Single: r2c2=8
Hidden Single: r4c9=4
Naked Single: r5c8=6
Naked Single: r5c7=2
Full House: r6c8=8
Full House: r1c8=4
Hidden Single: r5c4=4
Hidden Single: r1c7=9
Hidden Single: r9c1=9
Hidden Single: r9c7=4
Hidden Single: r8c3=6
Naked Single: r8c7=8
Naked Single: r3c7=1
Full House: r1c9=8
Full House: r7c7=6
Full House: r1c4=1
Full House: r3c4=8
Naked Single: r8c5=9
Full House: r8c9=2
Full House: r7c9=1
Naked Single: r5c5=3
Full House: r4c5=8
Naked Single: r7c1=5
Full House: r7c6=2
Naked Single: r2c1=1
Full House: r6c1=6
Full House: r2c3=5
Naked Single: r9c2=2
Full House: r9c3=1
Naked Single: r4c6=9
Naked Single: r9c4=5
Full House: r6c4=2
Full House: r6c2=5
Full House: r5c6=5
Full House: r5c3=9
Full House: r9c6=8
Naked Single: r4c2=3
Full House: r3c2=9
Full House: r3c3=3
Full House: r4c3=2
|
easy
| null |
normal_sudoku_1591
|
839247516...9.....5..1...9.6.7394....9.8....72..76...39..5..671..8619.3.16.473..9
|
839247516471956328526138794617394285394825167285761943943582671758619432162473859
|
normal_sudoku_1591
|
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
| 9
|
8 3 9 2 4 7 5 1 6
. . . 9 . . . . .
5 . . 1 . . . 9 .
6 . 7 3 9 4 . . .
. 9 . 8 . . . . 7
2 . . 7 6 . . . 3
9 . . 5 . . 6 7 1
. . 8 6 1 9 . 3 .
1 6 . 4 7 3 . . 9
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
839247516471956328526138794617394285394825167285761943943582671758619432162473859 #1 Medium (350)
Hidden Single: r6c7=9
Hidden Single: r5c8=6
Hidden Single: r5c1=3
Hidden Single: r7c3=3
Hidden Single: r7c2=4
Naked Single: r8c1=7
Full House: r2c1=4
Hidden Single: r6c8=4
Hidden Single: r5c3=4
Hidden Single: r6c2=8
Locked Pair: 2,8 in r2c89 => r2c237,r3c79<>2, r2c567,r3c79<>8
Naked Single: r3c9=4
Hidden Single: r8c7=4
Locked Candidates Type 1 (Pointing): 2 in b5 => r5c7<>2
Naked Single: r5c7=1
Hidden Single: r4c2=1
Full House: r6c3=5
Full House: r6c6=1
Naked Single: r2c2=7
Naked Single: r9c3=2
Full House: r8c2=5
Full House: r3c2=2
Full House: r8c9=2
Naked Single: r2c7=3
Naked Single: r3c3=6
Full House: r2c3=1
Naked Single: r9c7=8
Full House: r9c8=5
Naked Single: r2c9=8
Full House: r4c9=5
Naked Single: r2c5=5
Naked Single: r3c7=7
Full House: r4c7=2
Full House: r2c8=2
Full House: r2c6=6
Full House: r4c8=8
Naked Single: r3c6=8
Full House: r3c5=3
Naked Single: r5c5=2
Full House: r5c6=5
Full House: r7c6=2
Full House: r7c5=8
|
medium
| null |
normal_sudoku_1491
|
..4.6.5.78..1.....9....7.....3.5.6.9..52....172..19..4......41...6....38.4..8..65
|
134862597867195243952347186413758629695234871728619354389576412576421938241983765
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. . 4 . 6 . 5 . 7
8 . . 1 . . . . .
9 . . . . 7 . . .
. . 3 . 5 . 6 . 9
. . 5 2 . . . . 1
7 2 . . 1 9 . . 4
. . . . . . 4 1 .
. . 6 . . . . 3 8
. 4 . . 8 . . 6 5
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
134862597867195243952347186413758629695234871728619354389576412576421938241983765 #1 Easy (208)
Naked Single: r6c3=8
Naked Single: r7c9=2
Naked Single: r4c2=1
Naked Single: r6c7=3
Naked Single: r6c8=5
Full House: r6c4=6
Naked Single: r1c2=3
Naked Single: r4c1=4
Naked Single: r4c6=8
Naked Single: r5c1=6
Full House: r5c2=9
Naked Single: r1c6=2
Naked Single: r4c4=7
Full House: r4c8=2
Naked Single: r1c1=1
Naked Single: r3c3=2
Naked Single: r2c3=7
Naked Single: r7c3=9
Full House: r9c3=1
Naked Single: r9c6=3
Naked Single: r5c6=4
Full House: r5c5=3
Naked Single: r7c4=5
Naked Single: r7c5=7
Naked Single: r9c1=2
Naked Single: r9c4=9
Full House: r9c7=7
Full House: r8c7=9
Naked Single: r2c6=5
Naked Single: r3c5=4
Naked Single: r7c1=3
Full House: r8c1=5
Naked Single: r7c6=6
Full House: r8c6=1
Full House: r7c2=8
Full House: r8c2=7
Naked Single: r1c4=8
Full House: r1c8=9
Naked Single: r8c4=4
Full House: r8c5=2
Full House: r2c5=9
Full House: r3c4=3
Naked Single: r5c7=8
Full House: r5c8=7
Naked Single: r2c7=2
Full House: r3c7=1
Naked Single: r2c2=6
Full House: r3c2=5
Naked Single: r3c8=8
Full House: r2c8=4
Full House: r3c9=6
Full House: r2c9=3
|
easy
|
Basic 9x9 Sudoku 1491
|
normal_sudoku_1922
|
.58..6..........98.1.9....7.7........2..817648....3.2......52...41.9..86..3.4...1
|
958736412732154698416928357174269835329581764865473129697815243241397586583642971
|
puzzles1_unbiased
|
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
| 9
|
. 5 8 . . 6 . . .
. . . . . . . 9 8
. 1 . 9 . . . . 7
. 7 . . . . . . .
. 2 . . 8 1 7 6 4
8 . . . . 3 . 2 .
. . . . . 5 2 . .
. 4 1 . 9 . . 8 6
. . 3 . 4 . . . 1
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
958736412732154698416928357174269835329581764865473129697815243241397586583642971 #1 Easy (212)
Naked Single: r5c4=5
Naked Single: r5c3=9
Full House: r5c1=3
Naked Single: r6c2=6
Naked Single: r2c2=3
Naked Single: r6c5=7
Naked Single: r6c4=4
Naked Single: r6c3=5
Naked Single: r4c3=4
Full House: r4c1=1
Naked Single: r6c9=9
Full House: r6c7=1
Naked Single: r7c9=3
Naked Single: r1c9=2
Full House: r4c9=5
Naked Single: r8c7=5
Naked Single: r4c8=3
Full House: r4c7=8
Naked Single: r9c7=9
Naked Single: r9c8=7
Full House: r7c8=4
Naked Single: r9c2=8
Full House: r7c2=9
Naked Single: r1c8=1
Full House: r3c8=5
Naked Single: r9c6=2
Naked Single: r1c5=3
Naked Single: r4c6=9
Naked Single: r8c6=7
Naked Single: r9c4=6
Full House: r9c1=5
Naked Single: r1c4=7
Naked Single: r1c7=4
Full House: r1c1=9
Naked Single: r3c5=2
Naked Single: r2c6=4
Full House: r3c6=8
Naked Single: r8c1=2
Full House: r8c4=3
Naked Single: r4c4=2
Full House: r4c5=6
Naked Single: r7c5=1
Full House: r2c5=5
Full House: r2c4=1
Full House: r7c4=8
Naked Single: r2c7=6
Full House: r3c7=3
Naked Single: r3c3=6
Full House: r3c1=4
Naked Single: r2c1=7
Full House: r2c3=2
Full House: r7c3=7
Full House: r7c1=6
|
easy
|
Basic 9x9 Sudoku 1922
|
normal_sudoku_1383
|
..13...9.2459761..7.9841.52..7...8......879..18...9.4735819......263.5.16147....9
|
861325794245976138739841652497213865526487913183569247358192476972634581614758329
|
normal_sudoku_1383
|
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
| 9
|
. . 1 3 . . . 9 .
2 4 5 9 7 6 1 . .
7 . 9 8 4 1 . 5 2
. . 7 . . . 8 . .
. . . . 8 7 9 . .
1 8 . . . 9 . 4 7
3 5 8 1 9 . . . .
. . 2 6 3 . 5 . 1
6 1 4 7 . . . . 9
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
861325794245976138739841652497213865526487913183569247358192476972634581614758329 #1 Easy (156)
Naked Single: r1c2=6
Naked Single: r1c1=8
Full House: r3c2=3
Full House: r3c7=6
Naked Single: r8c1=9
Full House: r8c2=7
Naked Single: r1c9=4
Naked Single: r5c2=2
Full House: r4c2=9
Naked Single: r8c8=8
Full House: r8c6=4
Naked Single: r1c7=7
Naked Single: r7c9=6
Naked Single: r2c8=3
Full House: r2c9=8
Naked Single: r7c6=2
Naked Single: r9c8=2
Naked Single: r1c6=5
Full House: r1c5=2
Naked Single: r7c7=4
Full House: r7c8=7
Full House: r9c7=3
Full House: r6c7=2
Naked Single: r9c5=5
Full House: r9c6=8
Full House: r4c6=3
Naked Single: r6c4=5
Naked Single: r6c5=6
Full House: r4c5=1
Full House: r6c3=3
Full House: r5c3=6
Naked Single: r4c9=5
Full House: r5c9=3
Naked Single: r5c4=4
Full House: r4c4=2
Naked Single: r4c8=6
Full House: r5c8=1
Full House: r4c1=4
Full House: r5c1=5
|
easy
| null |
normal_sudoku_2956
|
97....2....189...784...7.9....41693.429385671.1.972..41..74...9.9.6.........59...
|
975164283261893547843527196587416932429385671316972854152748369798631425634259718
|
normal_sudoku_2956
|
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
| 9
|
9 7 . . . . 2 . .
. . 1 8 9 . . . 7
8 4 . . . 7 . 9 .
. . . 4 1 6 9 3 .
4 2 9 3 8 5 6 7 1
. 1 . 9 7 2 . . 4
1 . . 7 4 . . . 9
. 9 . 6 . . . . .
. . . . 5 9 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
975164283261893547843527196587416932429385671316972854152748369798631425634259718 #1 Medium (512)
Hidden Single: r4c9=2
Hidden Single: r2c1=2
Locked Candidates Type 1 (Pointing): 5 in b6 => r6c13<>5
Locked Candidates Type 1 (Pointing): 8 in b6 => r6c3<>8
Naked Triple: 3,5,6 in r136c3 => r478c3<>5, r789c3<>3, r79c3<>6
Locked Candidates Type 2 (Claiming): 5 in c3 => r2c2<>5
Locked Candidates Type 2 (Claiming): 5 in r2 => r1c89,r3c79<>5
Hidden Single: r8c9=5
Hidden Single: r7c2=5
Naked Single: r4c2=8
Naked Single: r4c3=7
Full House: r4c1=5
Hidden Single: r7c8=6
Hidden Single: r2c2=6
Full House: r9c2=3
Naked Single: r8c1=7
Naked Single: r9c9=8
Naked Single: r9c1=6
Full House: r6c1=3
Full House: r6c3=6
Naked Single: r7c7=3
Naked Single: r3c7=1
Naked Single: r7c6=8
Full House: r7c3=2
Naked Single: r8c7=4
Naked Single: r9c3=4
Full House: r8c3=8
Naked Single: r2c7=5
Naked Single: r9c7=7
Full House: r6c7=8
Full House: r6c8=5
Naked Single: r2c8=4
Full House: r2c6=3
Naked Single: r1c8=8
Naked Single: r1c5=6
Naked Single: r8c6=1
Full House: r1c6=4
Naked Single: r1c9=3
Full House: r3c9=6
Naked Single: r3c5=2
Full House: r8c5=3
Full House: r8c8=2
Full House: r9c4=2
Full House: r9c8=1
Naked Single: r1c3=5
Full House: r1c4=1
Full House: r3c4=5
Full House: r3c3=3
|
medium
| null |
normal_sudoku_5241
|
751..468.8..15.9..2.3...5..614537.9.5......3737.....654.76.5...1..4.8.59985.1..46
|
751924683846153972293786514614537298529861437378249165437695821162478359985312746
|
normal_sudoku_5241
|
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
| 9
|
7 5 1 . . 4 6 8 .
8 . . 1 5 . 9 . .
2 . 3 . . . 5 . .
6 1 4 5 3 7 . 9 .
5 . . . . . . 3 7
3 7 . . . . . 6 5
4 . 7 6 . 5 . . .
1 . . 4 . 8 . 5 9
9 8 5 . 1 . . 4 6
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
751924683846153972293786514614537298529861437378249165437695821162478359985312746 #1 Easy (156)
Naked Single: r2c3=6
Naked Single: r2c2=4
Full House: r3c2=9
Naked Single: r8c3=2
Naked Single: r3c6=6
Naked Single: r5c2=2
Naked Single: r7c2=3
Full House: r8c2=6
Naked Single: r8c5=7
Full House: r8c7=3
Naked Single: r3c5=8
Naked Single: r3c4=7
Naked Single: r3c8=1
Full House: r3c9=4
Naked Single: r7c8=2
Full House: r2c8=7
Naked Single: r7c5=9
Naked Single: r9c7=7
Naked Single: r1c5=2
Naked Single: r1c9=3
Full House: r1c4=9
Full House: r2c6=3
Full House: r2c9=2
Naked Single: r6c5=4
Full House: r5c5=6
Naked Single: r5c4=8
Naked Single: r9c6=2
Full House: r9c4=3
Full House: r6c4=2
Naked Single: r4c9=8
Full House: r4c7=2
Full House: r7c9=1
Full House: r7c7=8
Naked Single: r5c3=9
Full House: r6c3=8
Naked Single: r6c7=1
Full House: r5c7=4
Full House: r5c6=1
Full House: r6c6=9
|
easy
| null |
normal_sudoku_5025
|
.3.2......8...3...9.2.6...3...63.12..2.49.36.613..279487...6.3.2.437...636..2..57
|
537249681186753249942168573459637128728491365613582794875916432294375816361824957
|
normal_sudoku_5025
|
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
| 9
|
. 3 . 2 . . . . .
. 8 . . . 3 . . .
9 . 2 . 6 . . . 3
. . . 6 3 . 1 2 .
. 2 . 4 9 . 3 6 .
6 1 3 . . 2 7 9 4
8 7 . . . 6 . 3 .
2 . 4 3 7 . . . 6
3 6 . . 2 . . 5 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
537249681186753249942168573459637128728491365613582794875916432294375816361824957 #1 Easy (242)
Hidden Single: r5c6=1
Hidden Single: r8c8=1
Hidden Single: r4c6=7
Hidden Single: r3c4=1
Hidden Single: r7c5=1
Hidden Single: r9c3=1
Hidden Single: r3c8=7
Naked Single: r2c8=4
Full House: r1c8=8
Naked Single: r2c5=5
Naked Single: r3c7=5
Naked Single: r1c5=4
Full House: r6c5=8
Full House: r6c4=5
Naked Single: r3c2=4
Full House: r3c6=8
Naked Single: r1c6=9
Full House: r2c4=7
Naked Single: r7c4=9
Full House: r9c4=8
Naked Single: r1c7=6
Naked Single: r1c9=1
Naked Single: r8c6=5
Full House: r9c6=4
Full House: r9c7=9
Naked Single: r2c1=1
Naked Single: r2c3=6
Naked Single: r7c3=5
Full House: r8c2=9
Full House: r8c7=8
Full House: r4c2=5
Naked Single: r7c9=2
Full House: r7c7=4
Full House: r2c7=2
Full House: r2c9=9
Naked Single: r1c3=7
Full House: r1c1=5
Naked Single: r4c1=4
Full House: r5c1=7
Naked Single: r4c9=8
Full House: r4c3=9
Full House: r5c3=8
Full House: r5c9=5
|
easy
| null |
normal_sudoku_2436
|
1.9.....35..3...9.3.46....2813...27592.73.14664.1..938.3....5.4.9..8.....5..7..69
|
169827453582314697374695812813946275925738146647152938731269584496583721258471369
|
normal_sudoku_2436
|
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
| 9
|
1 . 9 . . . . . 3
5 . . 3 . . . 9 .
3 . 4 6 . . . . 2
8 1 3 . . . 2 7 5
9 2 . 7 3 . 1 4 6
6 4 . 1 . . 9 3 8
. 3 . . . . 5 . 4
. 9 . . 8 . . . .
. 5 . . 7 . . 6 9
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
169827453582314697374695812813946275925738146647152938731269584496583721258471369 #1 Medium (322)
Naked Single: r5c3=5
Full House: r5c6=8
Full House: r6c3=7
Hidden Single: r2c3=2
Hidden Single: r1c4=8
Naked Single: r1c8=5
Hidden Single: r7c1=7
Hidden Single: r8c4=5
Locked Candidates Type 2 (Claiming): 2 in c4 => r7c56,r89c6<>2
Naked Pair: 7,8 in r3c27 => r3c6<>7, r3c8<>8
Naked Single: r3c8=1
Naked Single: r2c9=7
Full House: r8c9=1
Naked Single: r8c8=2
Full House: r7c8=8
Naked Single: r3c7=8
Naked Single: r8c3=6
Naked Single: r8c1=4
Full House: r9c1=2
Naked Single: r9c7=3
Full House: r8c7=7
Full House: r8c6=3
Naked Single: r3c2=7
Naked Single: r7c3=1
Full House: r9c3=8
Naked Single: r9c4=4
Full House: r9c6=1
Naked Single: r1c2=6
Full House: r2c2=8
Naked Single: r4c4=9
Full House: r7c4=2
Naked Single: r2c6=4
Naked Single: r1c7=4
Full House: r2c7=6
Full House: r2c5=1
Naked Single: r1c5=2
Full House: r1c6=7
Naked Single: r4c6=6
Full House: r4c5=4
Naked Single: r6c5=5
Full House: r6c6=2
Naked Single: r7c6=9
Full House: r3c6=5
Full House: r3c5=9
Full House: r7c5=6
|
medium
| null |
normal_sudoku_5951
|
941826753.7.5..1..2853....61.29..4..4.71....5859..43...1.7.32.4.94.8..3..2.4..5..
|
941826753673549128285317946132958467467132895859674312516793284794285631328461579
|
normal_sudoku_5951
|
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
| 9
|
9 4 1 8 2 6 7 5 3
. 7 . 5 . . 1 . .
2 8 5 3 . . . . 6
1 . 2 9 . . 4 . .
4 . 7 1 . . . . 5
8 5 9 . . 4 3 . .
. 1 . 7 . 3 2 . 4
. 9 4 . 8 . . 3 .
. 2 . 4 . . 5 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
941826753673549128285317946132958467467132895859674312516793284794285631328461579 #1 Easy (156)
Naked Single: r3c7=9
Naked Single: r2c6=9
Naked Single: r8c7=6
Full House: r5c7=8
Naked Single: r3c8=4
Naked Single: r2c5=4
Naked Single: r9c6=1
Naked Single: r8c4=2
Full House: r6c4=6
Naked Single: r4c9=7
Naked Single: r5c6=2
Naked Single: r3c6=7
Full House: r3c5=1
Naked Single: r8c6=5
Full House: r4c6=8
Naked Single: r5c5=3
Naked Single: r6c5=7
Full House: r4c5=5
Naked Single: r4c8=6
Full House: r4c2=3
Full House: r5c2=6
Full House: r5c8=9
Naked Single: r8c9=1
Full House: r8c1=7
Naked Single: r7c8=8
Naked Single: r6c9=2
Full House: r6c8=1
Naked Single: r2c8=2
Full House: r9c8=7
Full House: r9c9=9
Full House: r2c9=8
Naked Single: r7c3=6
Naked Single: r9c5=6
Full House: r7c5=9
Full House: r7c1=5
Naked Single: r2c3=3
Full House: r2c1=6
Full House: r9c1=3
Full House: r9c3=8
|
easy
| null |
normal_sudoku_6646
|
3...1..4..5.4.3..1..69...37...8......6.5....37...3.4...9..2.78.2...7...4..13.8.2.
|
329715648857463291146982537534897162962541873718236459693124785285679314471358926
|
puzzles4_forum_hardest_1905
|
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
| 9
|
3 . . . 1 . . 4 .
. 5 . 4 . 3 . . 1
. . 6 9 . . . 3 7
. . . 8 . . . . .
. 6 . 5 . . . . 3
7 . . . 3 . 4 . .
. 9 . . 2 . 7 8 .
2 . . . 7 . . . 4
. . 1 3 . 8 . 2 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
329715648857463291146982537534897162962541873718236459693124785285679314471358926 #1 Easy (318)
Hidden Single: r2c3=7
Hidden Single: r1c4=7
Hidden Single: r9c2=7
Hidden Single: r7c3=3
Naked Single: r8c2=8
Naked Single: r1c2=2
Naked Single: r8c3=5
Naked Single: r6c2=1
Naked Single: r3c2=4
Full House: r4c2=3
Hidden Single: r8c7=3
Hidden Single: r2c7=2
Hidden Single: r6c4=2
Hidden Single: r3c6=2
Hidden Single: r4c1=5
Hidden Single: r3c1=1
Hidden Single: r8c8=1
Naked Single: r8c4=6
Full House: r7c4=1
Full House: r8c6=9
Naked Single: r6c6=6
Naked Single: r1c6=5
Naked Single: r3c5=8
Full House: r2c5=6
Full House: r3c7=5
Naked Single: r7c6=4
Full House: r9c5=5
Naked Single: r2c8=9
Full House: r2c1=8
Full House: r1c3=9
Naked Single: r7c1=6
Full House: r7c9=5
Full House: r9c1=4
Full House: r5c1=9
Naked Single: r5c8=7
Naked Single: r6c8=5
Full House: r4c8=6
Naked Single: r6c3=8
Full House: r6c9=9
Naked Single: r5c5=4
Full House: r4c5=9
Naked Single: r5c6=1
Full House: r4c6=7
Naked Single: r4c7=1
Naked Single: r4c9=2
Full House: r5c7=8
Full House: r5c3=2
Full House: r4c3=4
Naked Single: r9c9=6
Full House: r1c9=8
Full House: r1c7=6
Full House: r9c7=9
|
easy
|
Basic 9x9 Sudoku 6646
|
normal_sudoku_1160
|
..93.6857..68...41..3....2...8....3.9352614784217.....59417..8.3.2.5.....674.....
|
149326857256897341783514926678945132935261478421783569594172683312658794867439215
|
normal_sudoku_1160
|
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
| 9
|
. . 9 3 . 6 8 5 7
. . 6 8 . . . 4 1
. . 3 . . . . 2 .
. . 8 . . . . 3 .
9 3 5 2 6 1 4 7 8
4 2 1 7 . . . . .
5 9 4 1 7 . . 8 .
3 . 2 . 5 . . . .
. 6 7 4 . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
149326857256897341783514926678945132935261478421783569594172683312658794867439215 #1 Medium (288)
Naked Single: r4c2=7
Full House: r4c1=6
Naked Single: r2c2=5
Hidden Single: r2c7=3
Hidden Single: r4c7=1
Hidden Single: r8c4=6
Hidden Single: r8c7=7
Hidden Single: r8c9=4
Hidden Single: r4c9=2
Hidden Single: r6c8=6
Locked Candidates Type 1 (Pointing): 9 in b3 => r3c456<>9
Naked Single: r3c4=5
Full House: r4c4=9
Naked Single: r4c5=4
Full House: r4c6=5
Naked Single: r3c5=1
Naked Single: r1c5=2
Naked Single: r1c1=1
Full House: r1c2=4
Naked Single: r2c5=9
Naked Single: r9c1=8
Full House: r8c2=1
Full House: r3c2=8
Naked Single: r2c6=7
Full House: r2c1=2
Full House: r3c1=7
Full House: r3c6=4
Naked Single: r9c5=3
Full House: r6c5=8
Full House: r6c6=3
Naked Single: r8c8=9
Full House: r8c6=8
Full House: r9c8=1
Naked Single: r7c6=2
Full House: r9c6=9
Naked Single: r9c9=5
Full House: r9c7=2
Naked Single: r7c7=6
Full House: r7c9=3
Naked Single: r6c9=9
Full House: r3c9=6
Full House: r3c7=9
Full House: r6c7=5
|
medium
| null |
normal_sudoku_1916
|
..2.95.371...2....5.74.....3.......9.5...8.....1..36..816.5.42.........6.2..3.87.
|
462895137198327564537416298384562719659178342271943685816759423743281956925634871
|
puzzles1_unbiased
|
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
| 9
|
. . 2 . 9 5 . 3 7
1 . . . 2 . . . .
5 . 7 4 . . . . .
3 . . . . . . . 9
. 5 . . . 8 . . .
. . 1 . . 3 6 . .
8 1 6 . 5 . 4 2 .
. . . . . . . . 6
. 2 . . 3 . 8 7 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
462895137198327564537416298384562719659178342271943685816759423743281956925634871 #1 Easy (332)
Naked Single: r7c9=3
Naked Single: r1c7=1
Hidden Single: r3c2=3
Hidden Single: r2c4=3
Hidden Single: r5c7=3
Hidden Single: r8c3=3
Hidden Single: r2c6=7
Naked Single: r7c6=9
Full House: r7c4=7
Hidden Single: r4c7=7
Hidden Single: r9c3=5
Naked Single: r9c9=1
Naked Single: r9c4=6
Naked Single: r1c4=8
Naked Single: r9c6=4
Full House: r9c1=9
Hidden Single: r3c7=2
Naked Single: r3c9=8
Hidden Single: r8c5=8
Hidden Single: r3c8=9
Naked Single: r2c7=5
Full House: r8c7=9
Full House: r8c8=5
Naked Single: r2c9=4
Full House: r2c8=6
Naked Single: r5c9=2
Full House: r6c9=5
Hidden Single: r4c4=5
Hidden Single: r6c1=2
Naked Single: r6c4=9
Naked Single: r5c4=1
Full House: r8c4=2
Full House: r8c6=1
Naked Single: r5c8=4
Naked Single: r3c6=6
Full House: r3c5=1
Full House: r4c6=2
Naked Single: r5c3=9
Naked Single: r6c8=8
Full House: r4c8=1
Naked Single: r2c3=8
Full House: r2c2=9
Full House: r4c3=4
Naked Single: r4c5=6
Full House: r4c2=8
Naked Single: r6c2=7
Full House: r5c1=6
Full House: r5c5=7
Full House: r6c5=4
Naked Single: r8c2=4
Full House: r1c2=6
Full House: r1c1=4
Full House: r8c1=7
|
easy
|
Basic 9x9 Sudoku 1916
|
normal_sudoku_1646
|
3.92.84164.8.1.2..621.......9...4.8.7..58.629.86.....4..5.3....86.7..9.59.7..5...
|
379258416458316297621497853293674581714583629586129374145932768862741935937865142
|
normal_sudoku_1646
|
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
| 9
|
3 . 9 2 . 8 4 1 6
4 . 8 . 1 . 2 . .
6 2 1 . . . . . .
. 9 . . . 4 . 8 .
7 . . 5 8 . 6 2 9
. 8 6 . . . . . 4
. . 5 . 3 . . . .
8 6 . 7 . . 9 . 5
9 . 7 . . 5 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
379258416458316297621497853293674581714583629586129374145932768862741935937865142 #1 Easy (230)
Hidden Single: r8c6=1
Naked Single: r5c6=3
Naked Single: r5c3=4
Full House: r5c2=1
Naked Single: r7c2=4
Naked Single: r9c2=3
Naked Single: r8c3=2
Full House: r4c3=3
Full House: r7c1=1
Naked Single: r8c5=4
Full House: r8c8=3
Hidden Single: r3c4=4
Hidden Single: r9c8=4
Hidden Single: r6c7=3
Hidden Single: r2c4=3
Naked Single: r2c9=7
Naked Single: r2c2=5
Full House: r1c2=7
Full House: r1c5=5
Naked Single: r4c9=1
Naked Single: r2c8=9
Full House: r2c6=6
Naked Single: r4c4=6
Naked Single: r3c8=5
Naked Single: r9c4=8
Naked Single: r3c7=8
Full House: r3c9=3
Naked Single: r6c8=7
Full House: r4c7=5
Full House: r7c8=6
Naked Single: r7c4=9
Full House: r6c4=1
Naked Single: r9c7=1
Full House: r7c7=7
Naked Single: r9c9=2
Full House: r7c9=8
Full House: r7c6=2
Full House: r9c5=6
Naked Single: r4c1=2
Full House: r4c5=7
Full House: r6c1=5
Naked Single: r6c6=9
Full House: r3c6=7
Full House: r3c5=9
Full House: r6c5=2
|
easy
| null |
normal_sudoku_2743
|
.82.45691..192837595..16....95..4..3.48..9..6.73...9...26....34.1..6..29.......67
|
382745691461928375957316482695874213148239756273651948826197534714563829539482167
|
normal_sudoku_2743
|
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
| 9
|
. 8 2 . 4 5 6 9 1
. . 1 9 2 8 3 7 5
9 5 . . 1 6 . . .
. 9 5 . . 4 . . 3
. 4 8 . . 9 . . 6
. 7 3 . . . 9 . .
. 2 6 . . . . 3 4
. 1 . . 6 . . 2 9
. . . . . . . 6 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
382745691461928375957316482695874213148239756273651948826197534714563829539482167 #1 Easy (178)
Naked Single: r2c2=6
Full House: r9c2=3
Full House: r2c1=4
Naked Single: r3c3=7
Full House: r1c1=3
Full House: r1c4=7
Full House: r3c4=3
Naked Single: r8c3=4
Full House: r9c3=9
Hidden Single: r6c8=4
Naked Single: r3c8=8
Naked Single: r3c9=2
Full House: r3c7=4
Full House: r6c9=8
Naked Single: r4c8=1
Full House: r5c8=5
Naked Single: r6c5=5
Naked Single: r9c5=8
Naked Single: r4c5=7
Naked Single: r8c4=5
Naked Single: r9c1=5
Naked Single: r4c7=2
Full House: r5c7=7
Naked Single: r5c5=3
Full House: r7c5=9
Naked Single: r7c4=1
Naked Single: r8c7=8
Naked Single: r9c7=1
Full House: r7c7=5
Naked Single: r4c1=6
Full House: r4c4=8
Naked Single: r5c4=2
Full House: r5c1=1
Full House: r6c1=2
Naked Single: r7c6=7
Full House: r7c1=8
Full House: r8c1=7
Full House: r8c6=3
Naked Single: r9c6=2
Full House: r6c6=1
Full House: r6c4=6
Full House: r9c4=4
|
easy
| null |
normal_sudoku_2569
|
.4....9.....29.4.6.2.3.5..8..16..5.7...15.64.7..4.2....5..24...3....8..4.9....86.
|
143876952578291436629345718431689527982157643765432189856924371317568294294713865
|
puzzles1_unbiased
|
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
| 9
|
. 4 . . . . 9 . .
. . . 2 9 . 4 . 6
. 2 . 3 . 5 . . 8
. . 1 6 . . 5 . 7
. . . 1 5 . 6 4 .
7 . . 4 . 2 . . .
. 5 . . 2 4 . . .
3 . . . . 8 . . 4
. 9 . . . . 8 6 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
143876952578291436629345718431689527982157643765432189856924371317568294294713865 #1 Easy (254)
Hidden Single: r3c5=4
Hidden Single: r5c6=7
Naked Single: r2c6=1
Naked Single: r1c6=6
Naked Single: r9c6=3
Full House: r4c6=9
Hidden Single: r4c1=4
Hidden Single: r6c3=5
Hidden Single: r1c4=8
Full House: r1c5=7
Naked Single: r1c3=3
Naked Single: r9c5=1
Naked Single: r8c5=6
Naked Single: r9c1=2
Naked Single: r8c3=7
Naked Single: r9c9=5
Naked Single: r2c3=8
Naked Single: r8c2=1
Naked Single: r9c3=4
Full House: r9c4=7
Naked Single: r2c1=5
Naked Single: r2c2=7
Full House: r2c8=3
Naked Single: r7c3=6
Full House: r7c1=8
Naked Single: r8c7=2
Naked Single: r7c4=9
Full House: r8c4=5
Full House: r8c8=9
Naked Single: r1c1=1
Naked Single: r3c3=9
Full House: r3c1=6
Full House: r5c1=9
Full House: r5c3=2
Naked Single: r1c9=2
Full House: r1c8=5
Naked Single: r5c9=3
Full House: r5c2=8
Naked Single: r6c7=1
Naked Single: r7c9=1
Full House: r6c9=9
Naked Single: r4c2=3
Full House: r6c2=6
Naked Single: r3c7=7
Full House: r3c8=1
Full House: r7c7=3
Full House: r7c8=7
Naked Single: r6c8=8
Full House: r4c8=2
Full House: r4c5=8
Full House: r6c5=3
|
easy
|
Basic 9x9 Sudoku 2569
|
normal_sudoku_2172
|
.3....96.94856.....6..39.8..826..7.949......6.7..9..2.82697.41.754.168..3194...57
|
237841965948562371561739284182653749495287136673194528826975413754316892319428657
|
normal_sudoku_2172
|
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
| 9
|
. 3 . . . . 9 6 .
9 4 8 5 6 . . . .
. 6 . . 3 9 . 8 .
. 8 2 6 . . 7 . 9
4 9 . . . . . . 6
. 7 . . 9 . . 2 .
8 2 6 9 7 . 4 1 .
7 5 4 . 1 6 8 . .
3 1 9 4 . . . 5 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
237841965948562371561739284182653749495287136673194528826975413754316892319428657 #1 Easy (156)
Naked Single: r5c8=3
Naked Single: r7c9=3
Full House: r7c6=5
Naked Single: r2c8=7
Naked Single: r4c8=4
Full House: r8c8=9
Naked Single: r8c9=2
Full House: r8c4=3
Full House: r9c7=6
Naked Single: r4c5=5
Naked Single: r2c9=1
Naked Single: r4c1=1
Full House: r4c6=3
Naked Single: r2c6=2
Full House: r2c7=3
Naked Single: r5c3=5
Naked Single: r9c6=8
Full House: r9c5=2
Naked Single: r5c7=1
Naked Single: r6c1=6
Full House: r6c3=3
Naked Single: r5c5=8
Full House: r1c5=4
Naked Single: r5c6=7
Full House: r5c4=2
Naked Single: r6c7=5
Full House: r3c7=2
Full House: r6c9=8
Naked Single: r6c4=1
Full House: r6c6=4
Full House: r1c6=1
Naked Single: r1c9=5
Full House: r3c9=4
Naked Single: r3c1=5
Full House: r1c1=2
Naked Single: r3c4=7
Full House: r1c4=8
Full House: r1c3=7
Full House: r3c3=1
|
easy
| null |
normal_sudoku_1754
|
..971...84...6.975...49..6......76....79248533.518679..36.71.8...86....7...8.92.6
|
659712348412368975873495162984537621167924853325186794536271489298643517741859236
|
normal_sudoku_1754
|
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
| 9
|
. . 9 7 1 . . . 8
4 . . . 6 . 9 7 5
. . . 4 9 . . 6 .
. . . . . 7 6 . .
. . 7 9 2 4 8 5 3
3 . 5 1 8 6 7 9 .
. 3 6 . 7 1 . 8 .
. . 8 6 . . . . 7
. . . 8 . 9 2 . 6
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
659712348412368975873495162984537621167924853325186794536271489298643517741859236 #1 Easy (184)
Hidden Single: r7c9=9
Hidden Single: r7c7=4
Naked Single: r1c7=3
Naked Single: r3c7=1
Full House: r8c7=5
Naked Single: r3c9=2
Full House: r1c8=4
Naked Single: r3c3=3
Naked Single: r6c9=4
Full House: r4c9=1
Full House: r6c2=2
Full House: r4c8=2
Naked Single: r4c3=4
Naked Single: r9c3=1
Full House: r2c3=2
Naked Single: r9c8=3
Full House: r8c8=1
Naked Single: r2c4=3
Naked Single: r2c6=8
Full House: r2c2=1
Naked Single: r4c4=5
Full House: r4c5=3
Full House: r7c4=2
Full House: r7c1=5
Naked Single: r3c6=5
Full House: r1c6=2
Full House: r8c6=3
Naked Single: r5c2=6
Full House: r5c1=1
Naked Single: r8c5=4
Full House: r9c5=5
Naked Single: r1c1=6
Full House: r1c2=5
Naked Single: r9c1=7
Full House: r9c2=4
Naked Single: r8c2=9
Full House: r8c1=2
Naked Single: r3c1=8
Full House: r3c2=7
Full House: r4c2=8
Full House: r4c1=9
|
easy
| null |
normal_sudoku_5781
|
5.2..9.8.7...8.4....12.5.393..7..5.11.4953.78.75.2.394..8.9...591.5..8..25....96.
|
542379186793186452861245739389764521124953678675821394438697215916532847257418963
|
normal_sudoku_5781
|
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
| 9
|
5 . 2 . . 9 . 8 .
7 . . . 8 . 4 . .
. . 1 2 . 5 . 3 9
3 . . 7 . . 5 . 1
1 . 4 9 5 3 . 7 8
. 7 5 . 2 . 3 9 4
. . 8 . 9 . . . 5
9 1 . 5 . . 8 . .
2 5 . . . . 9 6 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
542379186793186452861245739389764521124953678675821394438697215916532847257418963 #1 Easy (214)
Naked Single: r4c8=2
Full House: r5c7=6
Full House: r5c2=2
Naked Single: r8c8=4
Naked Single: r3c7=7
Naked Single: r7c8=1
Full House: r2c8=5
Naked Single: r1c7=1
Full House: r7c7=2
Naked Single: r1c9=6
Full House: r2c9=2
Hidden Single: r1c5=7
Hidden Single: r7c6=7
Hidden Single: r9c5=1
Hidden Single: r8c6=2
Hidden Single: r8c5=3
Naked Single: r8c9=7
Full House: r8c3=6
Full House: r9c9=3
Naked Single: r4c3=9
Naked Single: r7c1=4
Naked Single: r9c3=7
Full House: r2c3=3
Full House: r7c2=3
Full House: r7c4=6
Naked Single: r1c2=4
Full House: r1c4=3
Naked Single: r2c4=1
Naked Single: r2c6=6
Full House: r2c2=9
Full House: r3c5=4
Full House: r4c5=6
Naked Single: r6c4=8
Full House: r9c4=4
Full House: r9c6=8
Naked Single: r4c2=8
Full House: r4c6=4
Full House: r6c1=6
Full House: r6c6=1
Full House: r3c2=6
Full House: r3c1=8
|
easy
| null |
normal_sudoku_1798
|
67.93....92156.34783....9..1....3.2.34....7..5.27...347....6..325637941841.2...7.
|
675934182921568347834127965197843526348652791562791834789416253256379418413285679
|
normal_sudoku_1798
|
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
| 9
|
6 7 . 9 3 . . . .
9 2 1 5 6 . 3 4 7
8 3 . . . . 9 . .
1 . . . . 3 . 2 .
3 4 . . . . 7 . .
5 . 2 7 . . . 3 4
7 . . . . 6 . . 3
2 5 6 3 7 9 4 1 8
4 1 . 2 . . . 7 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
675934182921568347834127965197843526348652791562791834789416253256379418413285679 #1 Easy (156)
Full House: r2c6=8
Naked Single: r6c6=1
Naked Single: r9c6=5
Naked Single: r5c6=2
Naked Single: r9c5=8
Naked Single: r9c7=6
Naked Single: r1c6=4
Full House: r3c6=7
Naked Single: r6c5=9
Naked Single: r6c7=8
Full House: r6c2=6
Naked Single: r9c9=9
Full House: r9c3=3
Naked Single: r1c3=5
Full House: r3c3=4
Naked Single: r3c4=1
Full House: r3c5=2
Naked Single: r5c5=5
Naked Single: r4c7=5
Naked Single: r7c8=5
Full House: r7c7=2
Full House: r1c7=1
Naked Single: r1c8=8
Full House: r1c9=2
Naked Single: r7c4=4
Full House: r7c5=1
Full House: r4c5=4
Naked Single: r4c9=6
Naked Single: r3c8=6
Full House: r3c9=5
Full House: r5c8=9
Full House: r5c9=1
Naked Single: r4c4=8
Full House: r5c4=6
Full House: r5c3=8
Naked Single: r4c2=9
Full House: r4c3=7
Full House: r7c3=9
Full House: r7c2=8
|
easy
| null |
normal_sudoku_4757
|
..67...2.5.7...4...42.3.6..63...1...25..7.9.......8..3...5.3.727..86254.........6
|
386749125517286439942135687638921754251374968479658213164593872793862541825417396
|
01_file1
|
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
| 9
|
. . 6 7 . . . 2 .
5 . 7 . . . 4 . .
. 4 2 . 3 . 6 . .
6 3 . . . 1 . . .
2 5 . . 7 . 9 . .
. . . . . 8 . . 3
. . . 5 . 3 . 7 2
7 . . 8 6 2 5 4 .
. . . . . . . . 6
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
386749125517286439942135687638921754251374968479658213164593872793862541825417396 #1 Medium (494)
Hidden Single: r1c1=3
Hidden Single: r2c8=3
Hidden Single: r5c4=3
Hidden Single: r3c9=7
Hidden Single: r6c2=7
Hidden Single: r9c6=7
Hidden Single: r7c2=6
Hidden Single: r9c2=2
Hidden Single: r9c3=5
Hidden Single: r8c3=3
Hidden Single: r9c7=3
Hidden Single: r4c7=7
Hidden Single: r6c7=2
Locked Candidates Type 1 (Pointing): 8 in b4 => r7c3<>8
Locked Candidates Type 1 (Pointing): 5 in b5 => r1c5<>5
Locked Candidates Type 1 (Pointing): 8 in b7 => r3c1<>8
Hidden Single: r3c8=8
Naked Single: r1c7=1
Full House: r7c7=8
Naked Single: r4c8=5
Naked Single: r2c9=9
Full House: r1c9=5
Naked Single: r2c6=6
Naked Single: r8c9=1
Full House: r8c2=9
Full House: r9c8=9
Naked Single: r5c6=4
Naked Single: r1c2=8
Full House: r2c2=1
Full House: r3c1=9
Naked Single: r1c6=9
Full House: r3c6=5
Full House: r3c4=1
Full House: r1c5=4
Naked Single: r5c9=8
Full House: r4c9=4
Naked Single: r2c4=2
Full House: r2c5=8
Naked Single: r9c4=4
Naked Single: r9c5=1
Full House: r7c5=9
Full House: r9c1=8
Naked Single: r5c3=1
Full House: r5c8=6
Full House: r6c8=1
Naked Single: r4c4=9
Full House: r6c4=6
Naked Single: r4c5=2
Full House: r6c5=5
Full House: r4c3=8
Naked Single: r6c1=4
Full House: r6c3=9
Full House: r7c3=4
Full House: r7c1=1
|
medium
|
Basic 9x9 Sudoku 4757
|
normal_sudoku_889
|
7..3...6..6..57..8.3..6.7..652...849847529613319846527.7..1.9..4......8...3..5.72
|
785394261264157398931268754652731849847529613319846527578412936426973185193685472
|
normal_sudoku_889
|
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
| 9
|
7 . . 3 . . . 6 .
. 6 . . 5 7 . . 8
. 3 . . 6 . 7 . .
6 5 2 . . . 8 4 9
8 4 7 5 2 9 6 1 3
3 1 9 8 4 6 5 2 7
. 7 . . 1 . 9 . .
4 . . . . . . 8 .
. . 3 . . 5 . 7 2
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
785394261264157398931268754652731849847529613319846527578412936426973185193685472 #1 Medium (242)
Hidden Single: r9c4=6
Hidden Single: r9c7=4
Hidden Single: r9c1=1
Locked Candidates Type 1 (Pointing): 9 in b7 => r1c2<>9
Hidden Single: r1c5=9
Naked Single: r9c5=8
Full House: r9c2=9
Naked Single: r8c2=2
Full House: r1c2=8
Naked Single: r7c1=5
Naked Single: r8c6=3
Naked Single: r7c8=3
Naked Single: r7c9=6
Naked Single: r8c3=6
Full House: r7c3=8
Naked Single: r4c6=1
Naked Single: r8c5=7
Full House: r4c5=3
Full House: r4c4=7
Naked Single: r8c7=1
Full House: r8c9=5
Full House: r8c4=9
Naked Single: r2c8=9
Full House: r3c8=5
Naked Single: r1c7=2
Full House: r2c7=3
Naked Single: r2c1=2
Full House: r3c1=9
Naked Single: r1c6=4
Naked Single: r1c9=1
Full House: r1c3=5
Full House: r3c9=4
Naked Single: r2c4=1
Full House: r2c3=4
Full House: r3c3=1
Naked Single: r7c6=2
Full House: r3c6=8
Full House: r3c4=2
Full House: r7c4=4
|
medium
| null |
normal_sudoku_1730
|
..394....1.68....9..9.51...5.7.96.416.........3...47.....48...........8.8...3..17
|
753942168146873259289651374527396841614728935938514726371485692492167583865239417
|
puzzles1_unbiased
|
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
| 9
|
. . 3 9 4 . . . .
1 . 6 8 . . . . 9
. . 9 . 5 1 . . .
5 . 7 . 9 6 . 4 1
6 . . . . . . . .
. 3 . . . 4 7 . .
. . . 4 8 . . . .
. . . . . . . 8 .
8 . . . 3 . . 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
753942168146873259289651374527396841614728935938514726371485692492167583865239417 #1 Easy (326)
Hidden Single: r3c4=6
Hidden Single: r5c6=8
Hidden Single: r8c5=6
Hidden Single: r1c7=1
Hidden Single: r2c6=3
Hidden Single: r6c3=8
Naked Single: r4c2=2
Naked Single: r4c4=3
Full House: r4c7=8
Naked Single: r6c1=9
Hidden Single: r8c4=1
Hidden Single: r6c5=1
Hidden Single: r5c4=7
Naked Single: r5c5=2
Full House: r2c5=7
Full House: r6c4=5
Full House: r1c6=2
Full House: r9c4=2
Naked Single: r1c1=7
Hidden Single: r3c1=2
Naked Single: r7c1=3
Full House: r8c1=4
Naked Single: r9c3=5
Naked Single: r8c3=2
Naked Single: r9c6=9
Naked Single: r7c3=1
Full House: r5c3=4
Full House: r5c2=1
Naked Single: r9c2=6
Full House: r9c7=4
Naked Single: r3c7=3
Naked Single: r3c8=7
Hidden Single: r3c9=4
Full House: r3c2=8
Naked Single: r1c2=5
Full House: r2c2=4
Naked Single: r1c8=6
Full House: r1c9=8
Naked Single: r6c8=2
Full House: r6c9=6
Naked Single: r2c8=5
Full House: r2c7=2
Naked Single: r7c8=9
Full House: r5c8=3
Naked Single: r7c2=7
Full House: r8c2=9
Naked Single: r8c7=5
Naked Single: r5c9=5
Full House: r5c7=9
Full House: r7c7=6
Naked Single: r7c6=5
Full House: r7c9=2
Full House: r8c6=7
Full House: r8c9=3
|
easy
|
Basic 9x9 Sudoku 1730
|
normal_sudoku_2622
|
5.8..3...1.3..7...4972...36379124...845..6.12612...49.286.3..71951......7346..8..
|
528963147163547289497281536379124658845396712612758493286435971951872364734619825
|
normal_sudoku_2622
|
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
| 9
|
5 . 8 . . 3 . . .
1 . 3 . . 7 . . .
4 9 7 2 . . . 3 6
3 7 9 1 2 4 . . .
8 4 5 . . 6 . 1 2
6 1 2 . . . 4 9 .
2 8 6 . 3 . . 7 1
9 5 1 . . . . . .
7 3 4 6 . . 8 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
528963147163547289497281536379124658845396712612758493286435971951872364734619825 #1 Medium (292)
Hidden Single: r7c4=4
Naked Single: r1c4=9
Hidden Single: r5c5=9
Locked Triple: 2,7,8 in r8c456 => r8c78,r9c6<>2
Hidden Single: r8c6=2
Hidden Single: r9c8=2
Naked Single: r1c8=4
Naked Single: r1c9=7
Naked Single: r8c8=6
Naked Single: r8c7=3
Naked Single: r5c7=7
Full House: r5c4=3
Naked Single: r8c9=4
Hidden Single: r2c5=4
Hidden Single: r4c7=6
Hidden Single: r6c9=3
Hidden Single: r2c2=6
Full House: r1c2=2
Naked Single: r1c7=1
Full House: r1c5=6
Naked Single: r3c7=5
Naked Single: r2c8=8
Full House: r4c8=5
Full House: r4c9=8
Naked Single: r7c7=9
Full House: r2c7=2
Full House: r2c9=9
Full House: r2c4=5
Full House: r7c6=5
Full House: r9c9=5
Naked Single: r6c6=8
Naked Single: r9c5=1
Full House: r9c6=9
Full House: r3c6=1
Full House: r3c5=8
Naked Single: r6c4=7
Full House: r6c5=5
Full House: r8c5=7
Full House: r8c4=8
|
medium
| null |
normal_sudoku_2212
|
.7.3..2....2.8.....5..7.9..6.....134..........31...6.91.3.27....4...67.....5.3.2.
|
879364251412985367356172948628759134794631582531248679163427895245896713987513426
|
puzzles1_unbiased
|
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
| 9
|
. 7 . 3 . . 2 . .
. . 2 . 8 . . . .
. 5 . . 7 . 9 . .
6 . . . . . 1 3 4
. . . . . . . . .
. 3 1 . . . 6 . 9
1 . 3 . 2 7 . . .
. 4 . . . 6 7 . .
. . . 5 . 3 . 2 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
879364251412985367356172948628759134794631582531248679163427895245896713987513426 #1 Easy (410)
Hidden Single: r2c2=1
Hidden Single: r5c5=3
Hidden Single: r8c9=3
Hidden Single: r2c7=3
Hidden Single: r5c9=2
Hidden Single: r8c1=2
Hidden Single: r5c4=6
Hidden Single: r1c5=6
Hidden Single: r3c1=3
Hidden Single: r4c2=2
Hidden Single: r2c9=7
Hidden Single: r8c3=5
Hidden Single: r5c6=1
Hidden Single: r3c3=6
Hidden Single: r2c8=6
Hidden Single: r3c4=1
Naked Single: r3c9=8
Naked Single: r3c8=4
Full House: r3c6=2
Hidden Single: r2c6=5
Hidden Single: r6c4=2
Hidden Single: r4c5=5
Naked Single: r6c5=4
Naked Single: r6c6=8
Naked Single: r4c6=9
Full House: r1c6=4
Full House: r4c4=7
Full House: r2c4=9
Full House: r4c3=8
Full House: r2c1=4
Naked Single: r8c4=8
Full House: r7c4=4
Naked Single: r1c3=9
Full House: r1c1=8
Naked Single: r5c2=9
Naked Single: r9c3=7
Full House: r5c3=4
Naked Single: r9c1=9
Naked Single: r9c5=1
Full House: r8c5=9
Full House: r8c8=1
Naked Single: r9c9=6
Naked Single: r1c8=5
Full House: r1c9=1
Full House: r7c9=5
Naked Single: r9c2=8
Full House: r7c2=6
Full House: r9c7=4
Naked Single: r6c8=7
Full House: r6c1=5
Full House: r5c1=7
Naked Single: r7c7=8
Full House: r5c7=5
Full House: r5c8=8
Full House: r7c8=9
|
easy
|
Basic 9x9 Sudoku 2212
|
normal_sudoku_5010
|
.6.8.3.....4.5.7...8.2...13..5.7.6...2.9.....9....18......2.3.6.92....7465....2..
|
761843925234159768589267413815472639423986157976531842148725396392618574657394281
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. 6 . 8 . 3 . . .
. . 4 . 5 . 7 . .
. 8 . 2 . . . 1 3
. . 5 . 7 . 6 . .
. 2 . 9 . . . . .
9 . . . . 1 8 . .
. . . . 2 . 3 . 6
. 9 2 . . . . 7 4
6 5 . . . . 2 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
761843925234159768589267413815472639423986157976531842148725396392618574657394281 #1 Easy (222)
Hidden Single: r3c6=7
Naked Single: r3c1=5
Naked Single: r3c3=9
Naked Single: r3c7=4
Full House: r3c5=6
Naked Single: r2c4=1
Naked Single: r2c6=9
Full House: r1c5=4
Naked Single: r2c2=3
Naked Single: r6c5=3
Naked Single: r2c1=2
Naked Single: r4c4=4
Naked Single: r5c5=8
Naked Single: r2c9=8
Full House: r2c8=6
Naked Single: r4c2=1
Naked Single: r4c6=2
Naked Single: r8c5=1
Full House: r9c5=9
Naked Single: r4c9=9
Naked Single: r8c7=5
Naked Single: r9c8=8
Naked Single: r9c9=1
Full House: r7c8=9
Naked Single: r4c8=3
Full House: r4c1=8
Naked Single: r1c7=9
Full House: r5c7=1
Naked Single: r9c6=4
Naked Single: r8c1=3
Naked Single: r8c4=6
Full House: r8c6=8
Naked Single: r9c3=7
Full House: r9c4=3
Naked Single: r6c4=5
Full House: r5c6=6
Full House: r7c6=5
Full House: r7c4=7
Naked Single: r1c3=1
Full House: r1c1=7
Naked Single: r6c3=6
Naked Single: r7c2=4
Full House: r6c2=7
Naked Single: r5c3=3
Full House: r7c3=8
Full House: r5c1=4
Full House: r7c1=1
Naked Single: r6c9=2
Full House: r6c8=4
Naked Single: r5c8=5
Full House: r1c8=2
Full House: r1c9=5
Full House: r5c9=7
|
easy
|
Basic 9x9 Sudoku 5010
|
normal_sudoku_6687
|
.1.2...4.9.3574.21....3.7..5...2......9..6..4.6.7..8...9...5..64.....28..753.....
|
617298543983574621254631798548123967729856134361749852192485376436917285875362419
|
01_file1
|
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
| 9
|
. 1 . 2 . . . 4 .
9 . 3 5 7 4 . 2 1
. . . . 3 . 7 . .
5 . . . 2 . . . .
. . 9 . . 6 . . 4
. 6 . 7 . . 8 . .
. 9 . . . 5 . . 6
4 . . . . . 2 8 .
. 7 5 3 . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
617298543983574621254631798548123967729856134361749852192485376436917285875362419 #1 Easy (208)
Naked Single: r2c2=8
Full House: r2c7=6
Naked Single: r8c2=3
Naked Single: r9c9=9
Naked Single: r4c2=4
Naked Single: r5c2=2
Full House: r3c2=5
Naked Single: r9c8=1
Naked Single: r6c3=1
Naked Single: r3c8=9
Naked Single: r3c9=8
Naked Single: r9c7=4
Naked Single: r6c1=3
Naked Single: r8c3=6
Naked Single: r3c6=1
Naked Single: r7c7=3
Naked Single: r6c6=9
Naked Single: r6c8=5
Naked Single: r1c3=7
Naked Single: r3c4=6
Naked Single: r1c7=5
Full House: r1c9=3
Naked Single: r7c8=7
Full House: r8c9=5
Naked Single: r1c6=8
Full House: r1c5=9
Full House: r1c1=6
Naked Single: r8c6=7
Naked Single: r5c7=1
Full House: r4c7=9
Naked Single: r6c5=4
Full House: r6c9=2
Full House: r4c9=7
Naked Single: r4c3=8
Full House: r5c1=7
Naked Single: r3c1=2
Full House: r3c3=4
Full House: r7c3=2
Naked Single: r5c8=3
Full House: r4c8=6
Naked Single: r4c6=3
Full House: r9c6=2
Full House: r4c4=1
Naked Single: r8c5=1
Full House: r8c4=9
Naked Single: r5c4=8
Full House: r5c5=5
Full House: r7c4=4
Naked Single: r9c1=8
Full House: r7c1=1
Full House: r7c5=8
Full House: r9c5=6
|
easy
|
Basic 9x9 Sudoku 6687
|
normal_sudoku_450
|
6...457.....7...6...2.3..84.2....6....8.2..7.7..5.8..3.19...83.3..46..25.....1.9.
|
693845712845712369172936584924173658538624971761598243419257836387469125256381497
|
puzzles4_forum_hardest_1905
|
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
| 9
|
6 . . . 4 5 7 . .
. . . 7 . . . 6 .
. . 2 . 3 . . 8 4
. 2 . . . . 6 . .
. . 8 . 2 . . 7 .
7 . . 5 . 8 . . 3
. 1 9 . . . 8 3 .
3 . . 4 6 . . 2 5
. . . . . 1 . 9 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
693845712845712369172936584924173658538624971761598243419257836387469125256381497 #1 Easy (204)
Naked Single: r7c4=2
Naked Single: r8c3=7
Naked Single: r1c8=1
Naked Single: r8c7=1
Naked Single: r9c7=4
Naked Single: r7c6=7
Naked Single: r8c2=8
Full House: r8c6=9
Naked Single: r1c3=3
Naked Single: r6c8=4
Full House: r4c8=5
Naked Single: r7c5=5
Naked Single: r7c9=6
Full House: r7c1=4
Full House: r9c9=7
Naked Single: r2c6=2
Naked Single: r3c6=6
Naked Single: r1c2=9
Naked Single: r5c7=9
Naked Single: r9c5=8
Full House: r9c4=3
Naked Single: r2c9=9
Naked Single: r1c4=8
Full House: r1c9=2
Naked Single: r6c2=6
Naked Single: r3c7=5
Full House: r2c7=3
Full House: r6c7=2
Naked Single: r5c9=1
Full House: r4c9=8
Naked Single: r2c5=1
Full House: r3c4=9
Naked Single: r6c3=1
Full House: r6c5=9
Full House: r4c5=7
Naked Single: r9c2=5
Naked Single: r3c1=1
Full House: r3c2=7
Naked Single: r5c1=5
Naked Single: r5c4=6
Full House: r4c4=1
Naked Single: r4c1=9
Naked Single: r4c3=4
Full House: r4c6=3
Full House: r5c2=3
Full House: r2c2=4
Full House: r5c6=4
Naked Single: r9c1=2
Full House: r9c3=6
Full House: r2c1=8
Full House: r2c3=5
|
easy
|
Basic 9x9 Sudoku 450
|
normal_sudoku_1150
|
4.1...6....91...235..8..7.181.94537..97.18..4...7.....1..4329877..589...928671435
|
481327659679154823532896741816945372397218564254763198165432987743589216928671435
|
normal_sudoku_1150
|
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
| 9
|
4 . 1 . . . 6 . .
. . 9 1 . . . 2 3
5 . . 8 . . 7 . 1
8 1 . 9 4 5 3 7 .
. 9 7 . 1 8 . . 4
. . . 7 . . . . .
1 . . 4 3 2 9 8 7
7 . . 5 8 9 . . .
9 2 8 6 7 1 4 3 5
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
481327659679154823532896741816945372397218564254763198165432987743589216928671435 #1 Easy (148)
Naked Single: r2c1=6
Naked Single: r2c5=5
Naked Single: r3c2=3
Naked Single: r2c7=8
Naked Single: r3c3=2
Naked Single: r1c9=9
Naked Single: r2c2=7
Full House: r1c2=8
Full House: r2c6=4
Naked Single: r4c3=6
Full House: r4c9=2
Naked Single: r1c5=2
Naked Single: r1c8=5
Full House: r3c8=4
Naked Single: r3c6=6
Full House: r3c5=9
Full House: r6c5=6
Naked Single: r7c3=5
Full House: r7c2=6
Naked Single: r5c7=5
Naked Single: r8c9=6
Full House: r6c9=8
Naked Single: r1c4=3
Full House: r1c6=7
Full House: r6c6=3
Full House: r5c4=2
Naked Single: r5c8=6
Full House: r5c1=3
Full House: r6c1=2
Naked Single: r8c2=4
Full House: r6c2=5
Full House: r6c3=4
Full House: r8c3=3
Naked Single: r6c7=1
Full House: r6c8=9
Full House: r8c8=1
Full House: r8c7=2
|
easy
| null |
normal_sudoku_4712
|
..8..3..4......8396..8...2.....7.6482865.49...1.6..352..21...8615......386...7...
|
728913564541762839693845721935271648286534917417698352372159486159486273864327195
|
normal_sudoku_4712
|
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
| 9
|
. . 8 . . 3 . . 4
. . . . . . 8 3 9
6 . . 8 . . . 2 .
. . . . 7 . 6 4 8
2 8 6 5 . 4 9 . .
. 1 . 6 . . 3 5 2
. . 2 1 . . . 8 6
1 5 . . . . . . 3
8 6 . . . 7 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
728913564541762839693845721935271648286534917417698352372159486159486273864327195 #1 Medium (608)
Hidden Single: r1c8=6
Hidden Single: r5c5=3
Hidden Single: r4c6=1
Hidden Single: r9c4=3
Hidden Single: r4c4=2
Locked Candidates Type 1 (Pointing): 9 in b5 => r6c13<>9
Naked Pair: 5,9 in r37c6 => r2c6<>5, r68c6<>9
Naked Single: r6c6=8
Full House: r6c5=9
Hidden Single: r8c5=8
Hidden Single: r8c6=6
Naked Single: r2c6=2
Hidden Single: r2c5=6
Hidden Single: r8c7=2
Hidden Single: r9c5=2
Hidden Single: r1c2=2
Hidden Single: r2c3=1
Hidden Single: r2c1=5
Hidden Single: r4c3=5
Hidden Single: r3c3=3
Locked Candidates Type 1 (Pointing): 4 in b1 => r7c2<>4
Locked Candidates Type 1 (Pointing): 5 in b8 => r7c7<>5
Locked Candidates Type 2 (Claiming): 9 in c3 => r7c12<>9
Hidden Single: r7c6=9
Full House: r3c6=5
Naked Single: r8c4=4
Full House: r7c5=5
Naked Single: r1c5=1
Full House: r3c5=4
Naked Single: r2c4=7
Full House: r1c4=9
Full House: r2c2=4
Naked Single: r1c1=7
Full House: r1c7=5
Full House: r3c2=9
Naked Single: r6c1=4
Full House: r6c3=7
Naked Single: r4c2=3
Full House: r4c1=9
Full House: r7c1=3
Full House: r7c2=7
Full House: r7c7=4
Naked Single: r8c3=9
Full House: r8c8=7
Full House: r9c3=4
Naked Single: r9c7=1
Full House: r3c7=7
Full House: r3c9=1
Naked Single: r5c8=1
Full House: r9c8=9
Full House: r9c9=5
Full House: r5c9=7
|
medium
| null |
normal_sudoku_6427
|
..5..874..67..31..2.....9......36.......81.7..185..6...53.6.8..9..........4..5.17
|
395128746867943152241657938729436581536281479418579623153762894972814365684395217
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. . 5 . . 8 7 4 .
. 6 7 . . 3 1 . .
2 . . . . . 9 . .
. . . . 3 6 . . .
. . . . 8 1 . 7 .
. 1 8 5 . . 6 . .
. 5 3 . 6 . 8 . .
9 . . . . . . . .
. . 4 . . 5 . 1 7
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
395128746867943152241657938729436581536281479418579623153762894972814365684395217 #1 Easy (232)
Naked Single: r3c3=1
Naked Single: r1c1=3
Naked Single: r1c2=9
Hidden Single: r4c9=1
Hidden Single: r9c1=6
Naked Single: r8c3=2
Naked Single: r4c3=9
Full House: r5c3=6
Naked Single: r9c2=8
Naked Single: r3c2=4
Full House: r2c1=8
Naked Single: r8c2=7
Full House: r7c1=1
Naked Single: r3c6=7
Naked Single: r4c2=2
Full House: r5c2=3
Naked Single: r8c6=4
Naked Single: r3c4=6
Naked Single: r3c5=5
Naked Single: r8c5=1
Naked Single: r1c5=2
Naked Single: r1c4=1
Full House: r1c9=6
Naked Single: r9c5=9
Naked Single: r2c5=4
Full House: r2c4=9
Full House: r6c5=7
Naked Single: r7c6=2
Full House: r6c6=9
Naked Single: r4c4=4
Full House: r5c4=2
Naked Single: r6c1=4
Naked Single: r7c4=7
Naked Single: r7c8=9
Full House: r7c9=4
Naked Single: r9c4=3
Full House: r8c4=8
Full House: r9c7=2
Naked Single: r4c7=5
Naked Single: r5c1=5
Full House: r4c1=7
Full House: r4c8=8
Naked Single: r5c7=4
Full House: r5c9=9
Full House: r8c7=3
Naked Single: r3c8=3
Full House: r3c9=8
Naked Single: r8c9=5
Full House: r8c8=6
Naked Single: r6c8=2
Full House: r2c8=5
Full House: r2c9=2
Full House: r6c9=3
|
easy
|
Basic 9x9 Sudoku 6427
|
normal_sudoku_4743
|
.2..86..1..7..438.9..3..6..7..41...28..6...7...9..7....3..51..85.....4....684..3.
|
324986751657124389981375624763418592845692173219537846432751968598263417176849235
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. 2 . . 8 6 . . 1
. . 7 . . 4 3 8 .
9 . . 3 . . 6 . .
7 . . 4 1 . . . 2
8 . . 6 . . . 7 .
. . 9 . . 7 . . .
. 3 . . 5 1 . . 8
5 . . . . . 4 . .
. . 6 8 4 . . 3 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
324986751657124389981375624763418592845692173219537846432751968598263417176849235 #1 Easy (214)
Hidden Single: r3c8=2
Naked Single: r3c5=7
Naked Single: r3c6=5
Naked Single: r1c4=9
Naked Single: r3c9=4
Naked Single: r2c5=2
Full House: r2c4=1
Naked Single: r1c8=5
Naked Single: r6c5=3
Naked Single: r2c1=6
Naked Single: r1c7=7
Full House: r2c9=9
Full House: r2c2=5
Naked Single: r5c5=9
Full House: r8c5=6
Naked Single: r4c2=6
Naked Single: r4c6=8
Naked Single: r5c6=2
Full House: r6c4=5
Naked Single: r8c9=7
Naked Single: r4c8=9
Naked Single: r9c6=9
Full House: r8c6=3
Naked Single: r6c9=6
Naked Single: r8c4=2
Full House: r7c4=7
Naked Single: r9c9=5
Full House: r5c9=3
Naked Single: r4c7=5
Full House: r4c3=3
Naked Single: r7c8=6
Naked Single: r8c8=1
Full House: r6c8=4
Naked Single: r5c7=1
Full House: r6c7=8
Naked Single: r1c3=4
Full House: r1c1=3
Naked Single: r8c3=8
Full House: r8c2=9
Naked Single: r9c7=2
Full House: r7c7=9
Naked Single: r6c2=1
Full House: r6c1=2
Naked Single: r5c2=4
Full House: r5c3=5
Naked Single: r7c3=2
Full House: r3c3=1
Full House: r3c2=8
Full House: r9c2=7
Full House: r9c1=1
Full House: r7c1=4
|
easy
|
Basic 9x9 Sudoku 4743
|
normal_sudoku_2622
|
5....3...1....7.....72...36...124...8.5..6.12.1....49.2.6.3..71951......7..6..8..
|
528963147163547289497281536379124658845396712612758493286435971951872364734619825
|
puzzles4_forum_hardest_1905
|
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
| 9
|
5 . . . . 3 . . .
1 . . . . 7 . . .
. . 7 2 . . . 3 6
. . . 1 2 4 . . .
8 . 5 . . 6 . 1 2
. 1 . . . . 4 9 .
2 . 6 . 3 . . 7 1
9 5 1 . . . . . .
7 . . 6 . . 8 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
528963147163547289497281536379124658845396712612758493286435971951872364734619825 #1 Medium (374)
Naked Single: r3c1=4
Hidden Single: r5c2=4
Naked Single: r7c2=8
Naked Single: r9c2=3
Full House: r9c3=4
Naked Single: r3c2=9
Hidden Single: r6c3=2
Naked Single: r1c3=8
Naked Single: r2c3=3
Full House: r4c3=9
Hidden Single: r6c1=6
Full House: r4c1=3
Full House: r4c2=7
Hidden Single: r7c4=4
Naked Single: r1c4=9
Hidden Single: r5c5=9
Locked Triple: 2,7,8 in r8c456 => r8c78,r9c6<>2
Hidden Single: r8c6=2
Hidden Single: r9c8=2
Naked Single: r1c8=4
Naked Single: r1c9=7
Naked Single: r8c8=6
Naked Single: r8c7=3
Naked Single: r5c7=7
Full House: r5c4=3
Naked Single: r8c9=4
Hidden Single: r2c5=4
Hidden Single: r4c7=6
Hidden Single: r6c9=3
Hidden Single: r2c2=6
Full House: r1c2=2
Naked Single: r1c7=1
Full House: r1c5=6
Naked Single: r3c7=5
Naked Single: r2c8=8
Full House: r4c8=5
Full House: r4c9=8
Naked Single: r7c7=9
Full House: r2c7=2
Full House: r2c9=9
Full House: r2c4=5
Full House: r7c6=5
Full House: r9c9=5
Naked Single: r6c6=8
Naked Single: r9c5=1
Full House: r9c6=9
Full House: r3c6=1
Full House: r3c5=8
Naked Single: r6c4=7
Full House: r6c5=5
Full House: r8c5=7
Full House: r8c4=8
|
medium
|
Basic 9x9 Sudoku 2622
|
normal_sudoku_620
|
.2.61..3...3.....1....37..4849276513256341897137..5......7.3....9...8.7.3.51.....
|
524619738763824951918537624849276513256341897137985246482793165691458372375162489
|
normal_sudoku_620
|
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
| 9
|
. 2 . 6 1 . . 3 .
. . 3 . . . . . 1
. . . . 3 7 . . 4
8 4 9 2 7 6 5 1 3
2 5 6 3 4 1 8 9 7
1 3 7 . . 5 . . .
. . . 7 . 3 . . .
. 9 . . . 8 . 7 .
3 . 5 1 . . . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
524619738763824951918537624849276513256341897137985246482793165691458372375162489 #1 Easy (198)
Hidden Single: r8c7=3
Hidden Single: r9c2=7
Hidden Single: r8c3=1
Naked Single: r3c3=8
Naked Single: r1c3=4
Full House: r7c3=2
Naked Single: r2c2=6
Naked Single: r1c6=9
Naked Single: r3c2=1
Full House: r7c2=8
Naked Single: r1c7=7
Naked Single: r3c4=5
Naked Single: r1c1=5
Full House: r1c9=8
Naked Single: r3c1=9
Full House: r2c1=7
Naked Single: r8c4=4
Naked Single: r2c4=8
Full House: r6c4=9
Full House: r6c5=8
Naked Single: r8c1=6
Full House: r7c1=4
Naked Single: r9c6=2
Full House: r2c6=4
Full House: r2c5=2
Naked Single: r8c5=5
Full House: r8c9=2
Naked Single: r2c7=9
Full House: r2c8=5
Naked Single: r6c9=6
Naked Single: r7c8=6
Naked Single: r9c9=9
Full House: r7c9=5
Naked Single: r3c8=2
Full House: r3c7=6
Naked Single: r7c5=9
Full House: r7c7=1
Full House: r9c5=6
Naked Single: r9c7=4
Full House: r6c7=2
Full House: r6c8=4
Full House: r9c8=8
|
easy
| null |
normal_sudoku_2436
|
1.......3...3...9.3.46....2..3...27.9..7...466..1....8......5.4.9..8.....5..7..6.
|
169827453582314697374695812813946275925738146647152938731269584496583721258471369
|
puzzles1_unbiased
|
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
| 9
|
1 . . . . . . . 3
. . . 3 . . . 9 .
3 . 4 6 . . . . 2
. . 3 . . . 2 7 .
9 . . 7 . . . 4 6
6 . . 1 . . . . 8
. . . . . . 5 . 4
. 9 . . 8 . . . .
. 5 . . 7 . . 6 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
169827453582314697374695812813946275925738146647152938731269584496583721258471369 #1 Medium (504)
Hidden Single: r1c3=9
Hidden Single: r7c2=3
Locked Candidates Type 1 (Pointing): 5 in b1 => r2c569<>5
Hidden Single: r4c9=5
Naked Single: r6c8=3
Naked Single: r5c7=1
Full House: r6c7=9
Hidden Single: r2c1=5
Hidden Single: r4c2=1
Hidden Single: r9c9=9
Hidden Single: r5c5=3
Hidden Single: r6c2=4
Naked Single: r4c1=8
Naked Single: r5c2=2
Naked Single: r5c3=5
Full House: r5c6=8
Full House: r6c3=7
Hidden Single: r1c4=8
Naked Single: r1c8=5
Hidden Single: r2c3=2
Hidden Single: r7c1=7
Hidden Single: r8c4=5
Locked Candidates Type 2 (Claiming): 2 in c4 => r7c56,r89c6<>2
Naked Pair: 7,8 in r3c27 => r3c6<>7, r3c8<>8
Naked Single: r3c8=1
Naked Single: r2c9=7
Full House: r8c9=1
Naked Single: r8c8=2
Full House: r7c8=8
Naked Single: r3c7=8
Naked Single: r8c3=6
Naked Single: r8c1=4
Full House: r9c1=2
Naked Single: r9c7=3
Full House: r8c7=7
Full House: r8c6=3
Naked Single: r3c2=7
Naked Single: r7c3=1
Full House: r9c3=8
Naked Single: r9c4=4
Full House: r9c6=1
Naked Single: r1c2=6
Full House: r2c2=8
Naked Single: r4c4=9
Full House: r7c4=2
Naked Single: r2c6=4
Naked Single: r1c7=4
Full House: r2c7=6
Full House: r2c5=1
Naked Single: r1c5=2
Full House: r1c6=7
Naked Single: r4c6=6
Full House: r4c5=4
Naked Single: r6c5=5
Full House: r6c6=2
Naked Single: r7c6=9
Full House: r3c6=5
Full House: r3c5=9
Full House: r7c5=6
|
medium
|
Basic 9x9 Sudoku 2436
|
normal_sudoku_2697
|
59...37.22..4.75.9..7295...7.1.3.42.34..5...7..87.4..3.83.7.2..17.5..3..62534..78
|
594863712236417589817295634761938425342156897958724163483679251179582346625341978
|
normal_sudoku_2697
|
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
| 9
|
5 9 . . . 3 7 . 2
2 . . 4 . 7 5 . 9
. . 7 2 9 5 . . .
7 . 1 . 3 . 4 2 .
3 4 . . 5 . . . 7
. . 8 7 . 4 . . 3
. 8 3 . 7 . 2 . .
1 7 . 5 . . 3 . .
6 2 5 3 4 . . 7 8
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
594863712236417589817295634761938425342156897958724163483679251179582346625341978 #1 Easy (196)
Naked Single: r2c3=6
Naked Single: r6c1=9
Naked Single: r1c3=4
Naked Single: r5c3=2
Full House: r8c3=9
Full House: r7c1=4
Full House: r3c1=8
Hidden Single: r6c5=2
Hidden Single: r8c6=2
Hidden Single: r5c7=8
Hidden Single: r8c5=8
Naked Single: r2c5=1
Full House: r1c5=6
Full House: r1c4=8
Full House: r1c8=1
Naked Single: r2c2=3
Full House: r2c8=8
Full House: r3c2=1
Naked Single: r3c7=6
Naked Single: r3c9=4
Full House: r3c8=3
Naked Single: r6c7=1
Full House: r9c7=9
Full House: r9c6=1
Naked Single: r8c9=6
Full House: r8c8=4
Naked Single: r4c9=5
Full House: r7c9=1
Full House: r7c8=5
Naked Single: r4c2=6
Full House: r6c2=5
Full House: r6c8=6
Full House: r5c8=9
Naked Single: r4c4=9
Full House: r4c6=8
Naked Single: r5c6=6
Full House: r5c4=1
Full House: r7c4=6
Full House: r7c6=9
|
easy
| null |
normal_sudoku_1019
|
4...6.7.1....1..2..1..7..3.3..957.1....1823.612.643....38524...9..731....51896..3
|
493268751867315924215479638386957412574182396129643587638524179942731865751896243
|
normal_sudoku_1019
|
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
| 9
|
4 . . . 6 . 7 . 1
. . . . 1 . . 2 .
. 1 . . 7 . . 3 .
3 . . 9 5 7 . 1 .
. . . 1 8 2 3 . 6
1 2 . 6 4 3 . . .
. 3 8 5 2 4 . . .
9 . . 7 3 1 . . .
. 5 1 8 9 6 . . 3
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
493268751867315924215479638386957412574182396129643587638524179942731865751896243 #1 Medium (358)
Hidden Single: r4c2=8
Naked Single: r1c2=9
Hidden Single: r7c7=1
Hidden Single: r4c3=6
Locked Candidates Type 1 (Pointing): 6 in b3 => r8c7<>6
Locked Candidates Type 1 (Pointing): 4 in b4 => r5c8<>4
Locked Candidates Type 1 (Pointing): 4 in b7 => r8c789<>4
Hidden Single: r9c8=4
Naked Single: r9c7=2
Full House: r9c1=7
Naked Single: r4c7=4
Full House: r4c9=2
Naked Single: r5c1=5
Naked Single: r7c1=6
Naked Single: r2c1=8
Full House: r3c1=2
Naked Single: r8c2=4
Full House: r8c3=2
Naked Single: r3c3=5
Naked Single: r3c4=4
Naked Single: r5c2=7
Full House: r2c2=6
Naked Single: r1c3=3
Full House: r2c3=7
Naked Single: r2c4=3
Full House: r1c4=2
Naked Single: r5c8=9
Full House: r5c3=4
Full House: r6c3=9
Naked Single: r7c8=7
Full House: r7c9=9
Naked Single: r3c9=8
Naked Single: r1c8=5
Full House: r1c6=8
Naked Single: r3c6=9
Full House: r2c6=5
Full House: r3c7=6
Naked Single: r8c9=5
Naked Single: r2c7=9
Full House: r2c9=4
Full House: r6c9=7
Naked Single: r6c8=8
Full House: r6c7=5
Full House: r8c7=8
Full House: r8c8=6
|
medium
| null |
normal_sudoku_2222
|
.3.18.4.....4.9.1.1...238...7....2..6......48.14....75.8.3.4.97...2..3......7..8.
|
539187426826459713147623859978546231652731948314892675281364597795218364463975182
|
puzzles4_forum_hardest_1905
|
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
| 9
|
. 3 . 1 8 . 4 . .
. . . 4 . 9 . 1 .
1 . . . 2 3 8 . .
. 7 . . . . 2 . .
6 . . . . . . 4 8
. 1 4 . . . . 7 5
. 8 . 3 . 4 . 9 7
. . . 2 . . 3 . .
. . . . 7 . . 8 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
539187426826459713147623859978546231652731948314892675281364597795218364463975182 #1 Easy (418)
Hidden Single: r3c2=4
Hidden Single: r4c5=4
Hidden Single: r2c7=7
Hidden Single: r2c9=3
Hidden Single: r4c8=3
Hidden Single: r8c6=8
Hidden Single: r1c8=2
Hidden Single: r9c9=2
Hidden Single: r3c8=5
Full House: r8c8=6
Hidden Single: r9c1=4
Hidden Single: r8c9=4
Hidden Single: r6c7=6
Naked Single: r6c6=2
Hidden Single: r9c3=3
Hidden Single: r6c1=3
Naked Single: r6c5=9
Full House: r6c4=8
Hidden Single: r4c9=1
Full House: r5c7=9
Hidden Single: r5c5=3
Hidden Single: r9c4=9
Hidden Single: r5c6=1
Hidden Single: r8c2=9
Hidden Single: r9c7=1
Full House: r7c7=5
Naked Single: r7c1=2
Hidden Single: r5c4=7
Naked Single: r3c4=6
Full House: r4c4=5
Full House: r4c6=6
Naked Single: r2c5=5
Full House: r1c6=7
Full House: r9c6=5
Full House: r9c2=6
Naked Single: r3c9=9
Full House: r1c9=6
Full House: r3c3=7
Naked Single: r2c1=8
Naked Single: r8c5=1
Full House: r7c5=6
Full House: r7c3=1
Naked Single: r2c2=2
Full House: r2c3=6
Full House: r5c2=5
Full House: r5c3=2
Naked Single: r4c1=9
Full House: r4c3=8
Naked Single: r8c3=5
Full House: r1c3=9
Full House: r1c1=5
Full House: r8c1=7
|
easy
|
Basic 9x9 Sudoku 2222
|
normal_sudoku_825
|
2....9.344..2..9.5..9.4.1.6.....5.1.526391..731....5...4...7..86..18......89.4...
|
261859734473216985859743126984675312526391847317428569142537698695182473738964251
|
normal_sudoku_825
|
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
| 9
|
2 . . . . 9 . 3 4
4 . . 2 . . 9 . 5
. . 9 . 4 . 1 . 6
. . . . . 5 . 1 .
5 2 6 3 9 1 . . 7
3 1 . . . . 5 . .
. 4 . . . 7 . . 8
6 . . 1 8 . . . .
. . 8 9 . 4 . . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
261859734473216985859743126984675312526391847317428569142537698695182473738964251 #1 Easy (232)
Hidden Single: r3c8=2
Hidden Single: r9c9=1
Naked Single: r9c1=7
Naked Single: r3c1=8
Naked Single: r3c6=3
Naked Single: r4c1=9
Full House: r7c1=1
Naked Single: r8c6=2
Hidden Single: r4c2=8
Hidden Single: r8c2=9
Naked Single: r8c9=3
Naked Single: r4c9=2
Full House: r6c9=9
Naked Single: r8c3=5
Naked Single: r9c2=3
Full House: r7c3=2
Naked Single: r7c7=6
Naked Single: r7c4=5
Naked Single: r9c7=2
Naked Single: r9c8=5
Full House: r9c5=6
Full House: r7c5=3
Full House: r7c8=9
Naked Single: r3c4=7
Full House: r3c2=5
Naked Single: r4c5=7
Naked Single: r2c5=1
Naked Single: r4c3=4
Full House: r6c3=7
Naked Single: r6c5=2
Full House: r1c5=5
Naked Single: r4c4=6
Full House: r4c7=3
Naked Single: r1c3=1
Full House: r2c3=3
Naked Single: r1c4=8
Full House: r2c6=6
Full House: r6c6=8
Full House: r6c4=4
Full House: r6c8=6
Naked Single: r1c7=7
Full House: r1c2=6
Full House: r2c2=7
Full House: r2c8=8
Naked Single: r8c7=4
Full House: r5c7=8
Full House: r5c8=4
Full House: r8c8=7
|
easy
| null |
normal_sudoku_3372
|
63..174.87.19.4.3.4.........74..2...8..4657133.679..4.......5....8......96.54..8.
|
635217498721984635489356127174832956892465713356791842243178569518629374967543281
|
normal_sudoku_3372
|
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
| 9
|
6 3 . . 1 7 4 . 8
7 . 1 9 . 4 . 3 .
4 . . . . . . . .
. 7 4 . . 2 . . .
8 . . 4 6 5 7 1 3
3 . 6 7 9 . . 4 .
. . . . . . 5 . .
. . 8 . . . . . .
9 6 . 5 4 . . 8 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
635217498721984635489356127174832956892465713356791842243178569518629374967543281 #1 Medium (398)
Naked Single: r1c4=2
Locked Candidates Type 1 (Pointing): 6 in b2 => r3c789<>6
Locked Candidates Type 1 (Pointing): 2 in b6 => r6c2<>2
Locked Candidates Type 2 (Claiming): 2 in c1 => r7c23,r8c2,r9c3<>2
Locked Candidates Type 2 (Claiming): 2 in r9 => r7c89,r8c789<>2
Hidden Single: r3c8=2
Naked Single: r2c7=6
Naked Single: r2c9=5
Naked Single: r1c8=9
Full House: r1c3=5
Naked Single: r2c5=8
Full House: r2c2=2
Naked Single: r6c9=2
Naked Single: r3c7=1
Full House: r3c9=7
Naked Single: r3c3=9
Full House: r3c2=8
Naked Single: r4c5=3
Naked Single: r5c2=9
Full House: r5c3=2
Naked Single: r6c7=8
Naked Single: r9c9=1
Naked Single: r3c5=5
Naked Single: r4c7=9
Naked Single: r6c6=1
Full House: r4c4=8
Full House: r6c2=5
Full House: r4c1=1
Naked Single: r9c6=3
Naked Single: r4c9=6
Full House: r4c8=5
Naked Single: r8c7=3
Full House: r9c7=2
Full House: r9c3=7
Full House: r7c3=3
Naked Single: r7c1=2
Full House: r8c1=5
Naked Single: r3c6=6
Full House: r3c4=3
Naked Single: r7c5=7
Full House: r8c5=2
Naked Single: r8c6=9
Full House: r7c6=8
Naked Single: r7c8=6
Full House: r8c8=7
Naked Single: r8c9=4
Full House: r7c9=9
Naked Single: r7c4=1
Full House: r7c2=4
Full House: r8c2=1
Full House: r8c4=6
|
medium
| null |
normal_sudoku_2537
|
...7.6....861.2..7...3.9..6.6.43........6.43.413..867..94.73...65289...3.37..5..9
|
329786154586142397741359826265437981978561432413928675194273568652894713837615249
|
normal_sudoku_2537
|
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
| 9
|
. . . 7 . 6 . . .
. 8 6 1 . 2 . . 7
. . . 3 . 9 . . 6
. 6 . 4 3 . . . .
. . . . 6 . 4 3 .
4 1 3 . . 8 6 7 .
. 9 4 . 7 3 . . .
6 5 2 8 9 . . . 3
. 3 7 . . 5 . . 9
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
329786154586142397741359826265437981978561432413928675194273568652894713837615249 #1 Easy (220)
Hidden Single: r8c7=7
Hidden Single: r9c5=1
Naked Single: r8c6=4
Full House: r8c8=1
Naked Single: r9c1=8
Full House: r7c1=1
Naked Single: r9c7=2
Naked Single: r9c4=6
Full House: r7c4=2
Full House: r9c8=4
Hidden Single: r6c4=9
Full House: r5c4=5
Naked Single: r6c5=2
Full House: r6c9=5
Naked Single: r7c9=8
Naked Single: r7c7=5
Full House: r7c8=6
Hidden Single: r1c9=4
Naked Single: r1c2=2
Naked Single: r5c2=7
Full House: r3c2=4
Naked Single: r5c6=1
Full House: r4c6=7
Naked Single: r5c9=2
Full House: r4c9=1
Naked Single: r5c1=9
Full House: r5c3=8
Naked Single: r4c3=5
Full House: r4c1=2
Naked Single: r3c3=1
Full House: r1c3=9
Naked Single: r3c7=8
Naked Single: r1c8=5
Naked Single: r3c5=5
Naked Single: r4c7=9
Full House: r4c8=8
Naked Single: r1c1=3
Naked Single: r1c5=8
Full House: r2c5=4
Full House: r1c7=1
Full House: r2c7=3
Naked Single: r2c8=9
Full House: r3c8=2
Full House: r3c1=7
Full House: r2c1=5
|
easy
| null |
normal_sudoku_2615
|
413895...78..62...56..7....658.1.3..324.8.1.997142..5..4....98529..5..1.83....7..
|
413895267789162534562374891658719342324586179971423658146237985297658413835941726
|
normal_sudoku_2615
|
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
| 9
|
4 1 3 8 9 5 . . .
7 8 . . 6 2 . . .
5 6 . . 7 . . . .
6 5 8 . 1 . 3 . .
3 2 4 . 8 . 1 . 9
9 7 1 4 2 . . 5 .
. 4 . . . . 9 8 5
2 9 . . 5 . . 1 .
8 3 . . . . 7 . .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
413895267789162534562374891658719342324586179971423658146237985297658413835941726 #1 Easy (170)
Full House: r7c1=1
Naked Single: r2c3=9
Full House: r3c3=2
Naked Single: r7c5=3
Full House: r9c5=4
Hidden Single: r3c6=4
Naked Single: r3c7=8
Naked Single: r6c7=6
Naked Single: r1c7=2
Naked Single: r5c8=7
Naked Single: r6c6=3
Full House: r6c9=8
Naked Single: r8c7=4
Full House: r2c7=5
Naked Single: r1c8=6
Full House: r1c9=7
Naked Single: r5c6=6
Full House: r5c4=5
Naked Single: r9c8=2
Naked Single: r7c6=7
Naked Single: r4c8=4
Full House: r4c9=2
Naked Single: r9c9=6
Full House: r8c9=3
Naked Single: r4c6=9
Full House: r4c4=7
Naked Single: r7c3=6
Full House: r7c4=2
Naked Single: r8c4=6
Naked Single: r8c6=8
Full House: r9c6=1
Full House: r8c3=7
Full House: r9c3=5
Full House: r9c4=9
Naked Single: r2c8=3
Full House: r3c8=9
Naked Single: r3c9=1
Full House: r2c9=4
Full House: r2c4=1
Full House: r3c4=3
|
easy
| null |
normal_sudoku_1592
|
..56.8..7...7.5.193....2..415.....8...8.71......8..6...........54.3.......6.5.94.
|
915648327462735819387912564153496782628571493794823651879264135541389276236157948
|
puzzles1_unbiased
|
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
| 9
|
. . 5 6 . 8 . . 7
. . . 7 . 5 . 1 9
3 . . . . 2 . . 4
1 5 . . . . . 8 .
. . 8 . 7 1 . . .
. . . 8 . . 6 . .
. . . . . . . . .
5 4 . 3 . . . . .
. . 6 . 5 . 9 4 .
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_annotation
|
hard
|
915648327462735819387912564153496782628571493794823651879264135541389276236157948 #1 Easy (380)
Naked Single: r9c6=7
Hidden Single: r3c8=6
Hidden Single: r6c9=1
Hidden Single: r5c4=5
Hidden Single: r3c7=5
Hidden Single: r6c8=5
Hidden Single: r7c9=5
Hidden Single: r3c2=8
Hidden Single: r2c7=8
Hidden Single: r4c7=7
Hidden Single: r5c8=9
Hidden Single: r8c9=6
Naked Single: r8c6=9
Hidden Single: r3c3=7
Hidden Single: r2c5=3
Hidden Single: r5c7=4
Hidden Single: r8c5=8
Hidden Single: r9c9=8
Naked Single: r9c1=2
Naked Single: r5c1=6
Naked Single: r8c3=1
Naked Single: r9c4=1
Full House: r9c2=3
Naked Single: r2c1=4
Naked Single: r8c7=2
Full House: r8c8=7
Naked Single: r3c4=9
Full House: r3c5=1
Full House: r1c5=4
Naked Single: r5c2=2
Full House: r5c9=3
Full House: r4c9=2
Naked Single: r7c3=9
Naked Single: r1c1=9
Naked Single: r2c3=2
Full House: r2c2=6
Full House: r1c2=1
Naked Single: r1c7=3
Full House: r1c8=2
Full House: r7c8=3
Full House: r7c7=1
Naked Single: r4c4=4
Full House: r7c4=2
Naked Single: r7c2=7
Full House: r6c2=9
Full House: r7c1=8
Full House: r6c1=7
Naked Single: r4c3=3
Full House: r6c3=4
Naked Single: r6c6=3
Full House: r6c5=2
Naked Single: r7c5=6
Full House: r4c5=9
Full House: r4c6=6
Full House: r7c6=4
|
easy
|
Basic 9x9 Sudoku 1592
|
normal_sudoku_2663
|
8..5.6.1..65...4..1..9...5.32.8..59.458693127.1..52...5.2..9..1..1..5.3..831....5
|
897546312265731489134928756326817594458693127719452863572389641641275938983164275
|
normal_sudoku_2663
|
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
| 9
|
8 . . 5 . 6 . 1 .
. 6 5 . . . 4 . .
1 . . 9 . . . 5 .
3 2 . 8 . . 5 9 .
4 5 8 6 9 3 1 2 7
. 1 . . 5 2 . . .
5 . 2 . . 9 . . 1
. . 1 . . 5 . 3 .
. 8 3 1 . . . . 5
|
Complete the sudoku board based on the rules and visual elements.
|
sudoku
|
sudoku_benchmark
|
hard
|
897546312265731489134928756326817594458693127719452863572389641641275938983164275 #1 Easy (292)
Hidden Single: r2c1=2
Hidden Single: r8c4=2
Hidden Single: r2c9=9
Hidden Single: r9c7=2
Hidden Single: r9c1=9
Hidden Single: r8c7=9
Hidden Single: r6c3=9
Hidden Single: r1c2=9
Hidden Single: r8c1=6
Full House: r6c1=7
Full House: r4c3=6
Naked Single: r6c4=4
Naked Single: r4c9=4
Naked Single: r8c9=8
Hidden Single: r3c2=3
Hidden Single: r7c5=8
Hidden Single: r7c4=3
Full House: r2c4=7
Naked Single: r2c8=8
Naked Single: r2c6=1
Full House: r2c5=3
Naked Single: r6c8=6
Naked Single: r4c6=7
Full House: r4c5=1
Naked Single: r6c9=3
Full House: r6c7=8
Naked Single: r9c6=4
Full House: r3c6=8
Naked Single: r1c9=2
Full House: r3c9=6
Naked Single: r8c5=7
Full House: r8c2=4
Full House: r9c5=6
Full House: r9c8=7
Full House: r7c2=7
Full House: r7c8=4
Full House: r7c7=6
Naked Single: r1c5=4
Full House: r3c5=2
Naked Single: r3c7=7
Full House: r1c7=3
Full House: r1c3=7
Full House: r3c3=4
|
easy
| null |
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