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 | solver_difficulty string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
sudoku_normal_hard_100 | .94.5..16.2..19...1.54..9..4.9...1...5.14.69....97.4355...9.7..98......12....1..9 | 394857216628319547175426983439685172752143698861972435513298764987564321246731859 | sudoku_normal_hard_100 | 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 . 5 . . 1 6
. 2 . . 1 9 . . .
1 . 5 4 . . 9 . .
4 . 9 . . . 1 . .
. 5 . 1 4 . 6 9 .
. . . 9 7 . 4 3 5
5 . . . 9 . 7 . .
9 8 . . . . . . 1
2 . . . . 1 . . 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 394857216628319547175426983439685172752143698861972435513298764987564321246731859 #1 Extreme (10610)
Hidden Rectangle: 1/6 in r6c23,r7c23 => r7c3<>6
Finned Franken Swordfish: 2 c57b6 r348 fr1c7 fr5c9 => r3c9<>2
Finned Franken Swordfish: 8 c57b6 r349 fr1c7 fr2c7 fr5c9 => r3c9<>8
Forcing Chain Contradiction i... | Extreme |
sudoku_normal_hard_101 | ..1..7..2....1..5.9..3..1...95683...624179....834526...4.79...1.19..4.7.5..8.19.. | 851967432436218759972345168795683214624179385183452697348796521219534876567821943 | sudoku_normal_hard_101 | 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 . . 7 . . 2
. . . . 1 . . 5 .
9 . . 3 . . 1 . .
. 9 5 6 8 3 . . .
6 2 4 1 7 9 . . .
. 8 3 4 5 2 6 . .
. 4 . 7 9 . . . 1
. 1 9 . . 4 . 7 .
5 . . 8 . 1 9 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 851967432436218759972345168795683214624179385183452697348796521219534876567821943 #1 Unfair (1756)
Locked Candidates Type 1 (Pointing): 7 in b4 => r2c1<>7
Discontinuous Nice Loop: 4 r1c8 -4- r9c8 =4= r9c9 -4- r4c9 -7- r6c9 -9- r6c8 =9= r1c8 => r1c8<>4
Discontinuous Nice Loop: 2 r2c1 -2- r2c4 =2= r3c5 =4= r1c5 ... | Unfair |
sudoku_normal_hard_102 | 7....8..3..5....6....65..1.3....4..8..7936.2..2.81.3...48..97..9.........73.....9 | 716298543835471962492653817369524178187936425524817396248369751951782634673145289 | sudoku_normal_hard_102 | 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 . . 3
. . 5 . . . . 6 .
. . . 6 5 . . 1 .
3 . . . . 4 . . 8
. . 7 9 3 6 . 2 .
. 2 . 8 1 . 3 . .
. 4 8 . . 9 7 . .
9 . . . . . . . .
. 7 3 . . . . . 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 716298543835471962492653817369524178187936425524817396248369751951782634673145289 #1 Extreme (9848)
Locked Candidates Type 1 (Pointing): 7 in b3 => r6c9<>7
Locked Candidates Type 1 (Pointing): 8 in b3 => r89c7<>8
Forcing Net Contradiction in r9c8 => r6c8<>4
r6c8=4 r9c8<>4
r6c8=4 (r5c9<>4 r5c1=4 r5c1<>8 r5c... | Extreme |
sudoku_normal_hard_103 | .....4..2..812..3..7..689..5....92......8.....6..3...4.3..7.5....18.....4....3.2. | 153794862698125437274368951517649283349281675862537194936472518721856349485913726 | sudoku_normal_hard_103 | 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 . . 2
. . 8 1 2 . . 3 .
. 7 . . 6 8 9 . .
5 . . . . 9 2 . .
. . . . 8 . . . .
. 6 . . 3 . . . 4
. 3 . . 7 . 5 . .
. . 1 8 . . . . .
4 . . . . 3 . 2 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 153794862698125437274368951517649283349281675862537194936472518721856349485913726 #1 Extreme (12304)
Locked Candidates Type 1 (Pointing): 9 in b2 => r1c123<>9
Finned X-Wing: 8 c29 r49 fr7c9 => r9c7<>8
Finned Swordfish: 4 r357 c348 fr5c2 => r4c3<>4
Discontinuous Nice Loop: 3 r3c3 -3- r4c3 =3= r4c9 -3- r8c9 =... | Extreme |
sudoku_normal_hard_104 | 7..4...95.5.7.82....2.5....5...8.7..9.36.4581.1...5...2...4.95....5.3....45....6. | 786432195159768234432159678564381729923674581817295346271846953698523417345917862 | sudoku_normal_hard_104 | 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 5
. 5 . 7 . 8 2 . .
. . 2 . 5 . . . .
5 . . . 8 . 7 . .
9 . 3 6 . 4 5 8 1
. 1 . . . 5 . . .
2 . . . 4 . 9 5 .
. . . 5 . 3 . . .
. 4 5 . . . . 6 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 786432195159768234432159678564381729923674581817295346271846953698523417345917862 #1 Extreme (8678)
Locked Candidates Type 1 (Pointing): 7 in b5 => r89c5<>7
Locked Candidates Type 1 (Pointing): 9 in b7 => r8c5<>9
Forcing Chain Contradiction in r9 => r8c2<>6
r8c2=6 r4c2<>6 r4c2=2 r5c2<>2 r5c5=2 r46c4<>2 r9c4=... | Extreme |
sudoku_normal_hard_105 | 7...15..3..24...1..1...25....79...51...18...6.6125..9.17...9.4...9......42.7..... | 794615283532478619816392574287946351945183726361257498173569842659824137428731965 | sudoku_normal_hard_105 | 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 5 . . 3
. . 2 4 . . . 1 .
. 1 . . . 2 5 . .
. . 7 9 . . . 5 1
. . . 1 8 . . . 6
. 6 1 2 5 . . 9 .
1 7 . . . 9 . 4 .
. . 9 . . . . . .
4 2 . 7 . . . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 794615283532478619816392574287946351945183726361257498173569842659824137428731965 #1 Extreme (10326)
Locked Candidates Type 1 (Pointing): 7 in b5 => r2c6<>7
Locked Candidates Type 2 (Claiming): 2 in c9 => r78c7,r8c8<>2
Naked Triple: 3,6,8 in r13c4,r2c6 => r23c5<>3, r23c5<>6
Grouped Discontinuous Nice Loop: ... | Extreme |
sudoku_normal_hard_106 | 7...816.........51.91........9.47...2.861.4...4..28..39...74.3..1.....4.4....68.. | 753481692824963751691752384569347128238619475147528963982174536316895247475236819 | sudoku_normal_hard_106 | 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 6 . .
. . . . . . . 5 1
. 9 1 . . . . . .
. . 9 . 4 7 . . .
2 . 8 6 1 . 4 . .
. 4 . . 2 8 . . 3
9 . . . 7 4 . 3 .
. 1 . . . . . 4 .
4 . . . . 6 8 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 753481692824963751691752384569347128238619475147528963982174536316895247475236819 #1 Extreme (8238)
Locked Candidates Type 1 (Pointing): 8 in b3 => r3c1<>8
Locked Candidates Type 1 (Pointing): 6 in b9 => r4c9<>6
Almost Locked Set XY-Wing: A=r2c123567 {2346789}, B=r3c156 {2356}, C=r34678c7 {123579}, X,Y=3,7, Z=... | Extreme |
sudoku_normal_hard_107 | 5....2.6..1.65.4..2.67......6..2.854...5.6.39.5.4896..4.1.6..8..8......66.5...1.. | 574192368819653427236748915967321854148576239352489671421965783783214596695837142 | sudoku_normal_hard_107 | 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 . 6 .
. 1 . 6 5 . 4 . .
2 . 6 7 . . . . .
. 6 . . 2 . 8 5 4
. . . 5 . 6 . 3 9
. 5 . 4 8 9 6 . .
4 . 1 . 6 . . 8 .
. 8 . . . . . . 6
6 . 5 . . . 1 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 574192368819653427236748915967321854148576239352489671421965783783214596695837142 #1 Extreme (9738)
Locked Candidates Type 1 (Pointing): 3 in b5 => r4c13<>3
Locked Candidates Type 1 (Pointing): 1 in b6 => r6c1<>1
AIC: 3 3- r2c6 -8- r2c1 =8= r5c1 =1= r5c5 -1- r4c4 -3 => r1c4,r4c6<>3
Hidden Single: r4c4=3
... | Extreme |
sudoku_normal_hard_108 | .8.6...7..74...9...3..8...2.2..7..5..6854...1.57..6.9..423......13..5...89..1...3 | 289634175674251938135987462421879356968543721357126894542398617713465289896712543 | sudoku_normal_hard_108 | 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 . 6 . . . 7 .
. 7 4 . . . 9 . .
. 3 . . 8 . . . 2
. 2 . . 7 . . 5 .
. 6 8 5 4 . . . 1
. 5 7 . . 6 . 9 .
. 4 2 3 . . . . .
. 1 3 . . 5 . . .
8 9 . . 1 . . . 3 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 289634175674251938135987462421879356968543721357126894542398617713465289896712543 #1 Extreme (4440)
Hidden Single: r5c7=7
Locked Candidates Type 2 (Claiming): 7 in r9 => r7c6,r8c4<>7
Hidden Pair: 7,9 in r78c9 => r7c9<>5, r78c9<>6, r78c9<>8, r8c9<>4
Locked Candidates Type 1 (Pointing): 5 in b9 => r13c7<>5
... | Extreme |
sudoku_normal_hard_109 | ..8.5..1.4..13...2.1...63...4.......2..34..7...79....8.....36....4.9..235..7..1.9 | 368254917475139862912876354843567291291348576657921438729413685184695723536782149 | sudoku_normal_hard_109 | 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 . . 1 .
4 . . 1 3 . . . 2
. 1 . . . 6 3 . .
. 4 . . . . . . .
2 . . 3 4 . . 7 .
. . 7 9 . . . . 8
. . . . . 3 6 . .
. . 4 . 9 . . 2 3
5 . . 7 . . 1 . 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 368254917475139862912876354843567291291348576657921438729413685184695723536782149 #1 Extreme (7622)
Finned X-Wing: 1 r68 c16 fr6c5 => r45c6<>1
AIC: 8/9 9- r2c6 =9= r1c6 =4= r9c6 -4- r9c8 -8- r8c7 =8= r2c7 -8 => r2c6<>8, r2c7<>9
Locked Candidates Type 1 (Pointing): 8 in b2 => r3c8<>8
Discontinuous Nice Loop:... | Extreme |
sudoku_normal_hard_110 | 71.92.6.4....14..22.46.7.9..2.4....5.46172..3..7...42.67.24......27.1.464.1.692.7 | 718925634963814572254637198129483765546172983837596421675248319392751846481369257 | sudoku_normal_hard_110 | 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 . 9 2 . 6 . 4
. . . . 1 4 . . 2
2 . 4 6 . 7 . 9 .
. 2 . 4 . . . . 5
. 4 6 1 7 2 . . 3
. . 7 . . . 4 2 .
6 7 . 2 4 . . . .
. . 2 7 . 1 . 4 6
4 . 1 . 6 9 2 . 7 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 718925634963814572254637198129483765546172983837596421675248319392751846481369257 #1 Hard (920)
Naked Single: r5c8=8
Naked Single: r5c7=9
Full House: r5c1=5
Naked Single: r6c9=1
Naked Single: r3c9=8
Full House: r7c9=9
Naked Single: r4c7=7
Full House: r4c8=6
Hidden Single: r2c2=6
Hidden Sin... | Hard |
sudoku_normal_hard_111 | 7....9..69.5..2..441..3.....5.......3478916252....5..7.2...476...49....26.....4.. | 783549216965182374412637598856723941347891625291465837128354769534976182679218453 | sudoku_normal_hard_111 | 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 . . 6
9 . 5 . . 2 . . 4
4 1 . . 3 . . . .
. 5 . . . . . . .
3 4 7 8 9 1 6 2 5
2 . . . . 5 . . 7
. 2 . . . 4 7 6 .
. . 4 9 . . . . 2
6 . . . . . 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 783549216965182374412637598856723941347891625291465837128354769534976182679218453 #1 Extreme (15882)
Forcing Chain Contradiction in r7 => r4c9<>9
r4c9=9 r79c9<>9 r9c8=9 r9c8<>5 r8c78=5 r8c1<>5 r7c1=5 r7c1<>8
r4c9=9 r7c9<>9 r7c3=9 r7c3<>8
r4c9=9 r3c9<>9 r3c9=8 r3c6<>8 r12c5=8 r7c5<>8
r4c9=9 r3c9<>9 r3c9=8 r7c... | Extreme |
sudoku_normal_hard_112 | .2......8..4.2..9.5..1..2.....5...12.52.816..1...62.8..9.273.6.6.....92.2..6..8.7 | 721936458364825791589147236876594312952381674143762589498273165617458923235619847 | sudoku_normal_hard_112 | 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
. . 4 . 2 . . 9 .
5 . . 1 . . 2 . .
. . . 5 . . . 1 2
. 5 2 . 8 1 6 . .
1 . . . 6 2 . 8 .
. 9 . 2 7 3 . 6 .
6 . . . . . 9 2 .
2 . . 6 . . 8 . 7 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 721936458364825791589147236876594312952381674143762589498273165617458923235619847 #1 Extreme (12828)
Locked Candidates Type 1 (Pointing): 8 in b8 => r8c23<>8
Empty Rectangle: 5 in b2 (r19c8) => r9c6<>5
Finned Swordfish: 9 r349 c356 fr4c1 => r6c3<>9
Forcing Chain Contradiction in r8c6 => r8c9<>4
r8c9=4 r8c... | Extreme |
sudoku_normal_hard_113 | .4...63....893...4...41..5..3.6..9..8....327...2...5.32.........9..6.1..7....9.35 | 149756382658932714327418659531627948864593271972184563285371496493865127716249835 | sudoku_normal_hard_113 | 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 3 . .
. . 8 9 3 . . . 4
. . . 4 1 . . 5 .
. 3 . 6 . . 9 . .
8 . . . . 3 2 7 .
. . 2 . . . 5 . 3
2 . . . . . . . .
. 9 . . 6 . 1 . .
7 . . . . 9 . 3 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 149756382658932714327418659531627948864593271972184563285371496493865127716249835 #1 Extreme (14684)
Locked Candidates Type 1 (Pointing): 4 in b6 => r78c8<>4
Locked Candidates Type 1 (Pointing): 2 in b9 => r8c46<>2
Naked Triple: 1,5,6 in r5c249 => r5c3<>1, r5c35<>5, r5c3<>6
Forcing Net Contradiction in r4c3... | Extreme |
sudoku_normal_hard_114 | ..8...7..3..1...6..9......54...3..2....27.......6.43.7..534.8...49.1...36....2.4. | 168495732354127968792863415476938521583271694921654387215349876849716253637582149 | sudoku_normal_hard_114 | 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 . .
3 . . 1 . . . 6 .
. 9 . . . . . . 5
4 . . . 3 . . 2 .
. . . 2 7 . . . .
. . . 6 . 4 3 . 7
. . 5 3 4 . 8 . .
. 4 9 . 1 . . . 3
6 . . . . 2 . 4 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 168495732354127968792863415476938521583271694921654387215349876849716253637582149 #1 Extreme (6616)
Locked Candidates Type 1 (Pointing): 6 in b8 => r13c6<>6
Hidden Pair: 2,6 in r7c9,r8c7 => r7c9<>1, r7c9<>9, r8c7<>5
Finned Swordfish: 7 r249 c234 fr2c6 => r3c4<>7
Locked Candidates Type 1 (Pointing): 7 in b2 ... | Extreme |
sudoku_normal_hard_115 | ....82.6.26.95..1.9...1.2....6.2...141.8396...29.6..84..429..3..3..7....69.3451.. | 541782963263954817978613245386427591415839672729561384154298736832176459697345128 | sudoku_normal_hard_115 | 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 . 6 .
2 6 . 9 5 . . 1 .
9 . . . 1 . 2 . .
. . 6 . 2 . . . 1
4 1 . 8 3 9 6 . .
. 2 9 . 6 . . 8 4
. . 4 2 9 . . 3 .
. 3 . . 7 . . . .
6 9 . 3 4 5 1 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 541782963263954817978613245386427591415839672729561384154298736832176459697345128 #1 Extreme (3156)
Locked Candidates Type 1 (Pointing): 3 in b4 => r1c1<>3
Locked Candidates Type 1 (Pointing): 3 in b6 => r12c7<>3
Empty Rectangle: 8 in b1 (r9c39) => r3c9<>8
Locked Candidates Type 1 (Pointing): 8 in b3 => r2c... | Extreme |
sudoku_normal_hard_116 | .26.5....4..2.9..6..98467.......183...89.2..71......6.6...2...4.5...4.....43...7. | 826157943417239586539846721965471832348962157172583469681725394753694218294318675 | sudoku_normal_hard_116 | 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 . 5 . . . .
4 . . 2 . 9 . . 6
. . 9 8 4 6 7 . .
. . . . . 1 8 3 .
. . 8 9 . 2 . . 7
1 . . . . . . 6 .
6 . . . 2 . . . 4
. 5 . . . 4 . . .
. . 4 3 . . . 7 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 826157943417239586539846721965471832348962157172583469681725394753694218294318675 #1 Extreme (7800)
Naked Pair: 3,5 in r35c1 => r18c1<>3, r4c1<>5
Grouped Discontinuous Nice Loop: 5 r2c8 -5- r2c3 =5= r3c1 =3= r5c1 -3- r5c5 -6- r4c5 -7- r2c5 =7= r1c46 -7- r1c1 -8- r2c2 =8= r2c8 => r2c8<>5
2-String Kite: 5 in r2c... | Extreme |
sudoku_normal_hard_117 | 3...7.52.......867..75..31...143.9.2.....9.46.9.....53..2.1.6.5.4.6....86....8... | 386971524915243867427586319561437982238159746794862153872314695143695278659728431 | sudoku_normal_hard_117 | 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 . . . 7 . 5 2 .
. . . . . . 8 6 7
. . 7 5 . . 3 1 .
. . 1 4 3 . 9 . 2
. . . . . 9 . 4 6
. 9 . . . . . 5 3
. . 2 . 1 . 6 . 5
. 4 . 6 . . . . 8
6 . . . . 8 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 386971524915243867427586319561437982238159746794862153872314695143695278659728431 #1 Unfair (1150)
Hidden Single: r4c8=8
Hidden Single: r7c6=4
Hidden Single: r9c7=4
Hidden Single: r9c9=1
Hidden Single: r8c7=2
Hidden Single: r8c1=1
Skyscraper: 6 in r1c3,r3c5 (connected by r6c35) => r1c6,r3c2<>6
N... | Unfair |
sudoku_normal_hard_118 | .6582.....2.1..65...9.65...25.9.1.6..81.562399.628...5..86.....6.25..3.4.1......6 | 165827943824139657739465182253941768481756239976283415348672591692518374517394826 | sudoku_normal_hard_118 | 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 5 8 2 . . . .
. 2 . 1 . . 6 5 .
. . 9 . 6 5 . . .
2 5 . 9 . 1 . 6 .
. 8 1 . 5 6 2 3 9
9 . 6 2 8 . . . 5
. . 8 6 . . . . .
6 . 2 5 . . 3 . 4
. 1 . . . . . . 6 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 165827943824139657739465182253941768481756239976283415348672591692518374517394826 #1 Extreme (6938)
Locked Candidates Type 1 (Pointing): 9 in b3 => r1c6<>9
Finned Franken Swordfish: 3 c24b5 r367 fr4c5 fr9c4 => r7c5<>3
Sashimi Swordfish: 3 c345 r249 fr3c4 => r2c6<>3
Forcing Net Verity => r1c6<>3
r3c4=3 r1c... | Extreme |
sudoku_normal_hard_119 | .5..4..7...7..94..8.47.52....61.4....4.976.3..7..5264.7...2.3.4.2.4.....4..5.7.2. | 652843179317269485894715263236184597145976832978352641789621354523498716461537928 | sudoku_normal_hard_119 | 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 . . 4 . . 7 .
. . 7 . . 9 4 . .
8 . 4 7 . 5 2 . .
. . 6 1 . 4 . . .
. 4 . 9 7 6 . 3 .
. 7 . . 5 2 6 4 .
7 . . . 2 . 3 . 4
. 2 . 4 . . . . .
4 . . 5 . 7 . 2 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 652843179317269485894715263236184597145976832978352641789621354523498716461537928 #1 Extreme (10104)
Almost Locked Set XZ-Rule: A=r4c258 {3589}, B=r159c7 {1589}, X=5, Z=8,9 => r4c7<>8, r4c7<>9
Hidden Rectangle: 5/7 in r4c79,r8c79 => r8c9<>5
Grouped Discontinuous Nice Loop: 9 r9c2 -9- r3c2 =9= r1c13 -9- r1c7 =9... | Extreme |
sudoku_normal_hard_120 | .....2..95...3.....1.7..3...6.41..7...4..89.....6..4..9......5...8.....2.7..6.1.. | 743182569586934217219756384362419875154378926897625431921847653638591742475263198 | sudoku_normal_hard_120 | 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 . . . .
. 1 . 7 . . 3 . .
. 6 . 4 1 . . 7 .
. . 4 . . 8 9 . .
. . . 6 . . 4 . .
9 . . . . . . 5 .
. . 8 . . . . . 2
. 7 . . 6 . 1 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 743182569586934217219756384362419875154378926897625431921847653638591742475263198 #1 Extreme (18884)
Hidden Pair: 1,6 in r7c3,r8c1 => r7c3<>2, r7c3,r8c1<>3, r8c1<>4
2-String Kite: 9 in r2c2,r4c6 (connected by r4c3,r6c2) => r2c6<>9
Grouped Discontinuous Nice Loop: 1 r6c8 -1- r6c3 =1= r7c3 =6= r8c1 -6- r8c7 -7- ... | Extreme |
sudoku_normal_hard_121 | .5....67...9.....28....1.4.7....8...4..3.521...2.9........5...6.....7.3....8.34.. | 253489671149736852867521943731268594496375218582194367314952786928647135675813429 | sudoku_normal_hard_121 | 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 7 .
. . 9 . . . . . 2
8 . . . . 1 . 4 .
7 . . . . 8 . . .
4 . . 3 . 5 2 1 .
. . 2 . 9 . . . .
. . . . 5 . . . 6
. . . . . 7 . 3 .
. . . 8 . 3 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 253489671149736852867521943731268594496375218582194367314952786928647135675813429 #1 Extreme (18144)
Locked Candidates Type 1 (Pointing): 9 in b4 => r789c2<>9
Naked Pair: 4,6 in r26c6 => r17c6<>4
Turbot Fish: 2 r3c2 =2= r1c1 -2- r1c6 =2= r7c6 => r7c2<>2
Finned Swordfish: 2 r348 c245 fr8c1 => r9c2<>2
Almo... | Extreme |
sudoku_normal_hard_122 | .....54....98....3.4..3.86....5..798.92687....7..9...61....8.3.93..1.6..2.43....1 | 783265419629841573541739862416523798392687145875194326167958234938412657254376981 | sudoku_normal_hard_122 | 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 4 . .
. . 9 8 . . . . 3
. 4 . . 3 . 8 6 .
. . . 5 . . 7 9 8
. 9 2 6 8 7 . . .
. 7 . . 9 . . . 6
1 . . . . 8 . 3 .
9 3 . . 1 . 6 . .
2 . 4 3 . . . . 1 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 783265419629841573541739862416523798392687145875194326167958234938412657254376981 #1 Extreme (2926)
Locked Candidates Type 1 (Pointing): 9 in b3 => r7c9<>9
Locked Candidates Type 1 (Pointing): 2 in b6 => r6c46<>2
Locked Candidates Type 1 (Pointing): 7 in b7 => r13c3<>7
Locked Candidates Type 2 (Claiming): 1... | Extreme |
sudoku_normal_hard_123 | ..1.3.8..9....2.6..2......427..5..3...467...8...2..7...1..69.....7..56..6..3.7.5. | 561734829948512367723986514279458136154673298836291745315869472497125683682347951 | sudoku_normal_hard_123 | 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 . 8 . .
9 . . . . 2 . 6 .
. 2 . . . . . . 4
2 7 . . 5 . . 3 .
. . 4 6 7 . . . 8
. . . 2 . . 7 . .
. 1 . . 6 9 . . .
. . 7 . . 5 6 . .
6 . . 3 . 7 . 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 561734829948512367723986514279458136154673298836291745315869472497125683682347951 #1 Extreme (5898)
Discontinuous Nice Loop: 5 r1c9 -5- r6c9 =5= r5c7 =2= r5c8 -2- r1c8 =2= r1c9 => r1c9<>5
Almost Locked Set XZ-Rule: A=r5c126 {1359}, B=r78c1,r89c2 {34589}, X=9, Z=5 => r6c1<>5
Forcing Chain Contradiction in c8 =>... | Extreme |
sudoku_normal_hard_124 | 5.6.....7.9.5..3..3....2.......2..7..65..12.8..96..4.1.4.2...1.6..9.45...5..8.7.4 | 516349827298517346374862195183425679465791238729638451847256913631974582952183764 | sudoku_normal_hard_124 | 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 . . . . . 7
. 9 . 5 . . 3 . .
3 . . . . 2 . . .
. . . . 2 . . 7 .
. 6 5 . . 1 2 . 8
. . 9 6 . . 4 . 1
. 4 . 2 . . . 1 .
6 . . 9 . 4 5 . .
. 5 . . 8 . 7 . 4 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 516349827298517346374862195183425679465791238729638451847256913631974582952183764 #1 Extreme (6000)
Hidden Triple: 5,6,9 in r4c679 => r4c69<>3, r4c6<>8
Locked Candidates Type 1 (Pointing): 3 in b6 => r89c8<>3
2-String Kite: 2 in r1c2,r8c9 (connected by r1c8,r2c9) => r8c2<>2
2-String Kite: 9 in r1c6,r5c8 (co... | Extreme |
sudoku_normal_hard_125 | 8...23....3...6.9...25..3..3.7.6.5..1...359766..7...43.8.6...394..3...1...3..76.. | 816923457534876192972541368397468521148235976625719843781654239469382715253197684 | sudoku_normal_hard_125 | 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 3 . . .
. 3 . . . 6 . 9 .
. . 2 5 . . 3 . .
3 . 7 . 6 . 5 . .
1 . . . 3 5 9 7 6
6 . . 7 . . . 4 3
. 8 . 6 . . . 3 9
4 . . 3 . . . 1 .
. . 3 . . 7 6 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 816923457534876192972541368397468521148235976625719843781654239469382715253197684 #1 Extreme (8308)
Locked Candidates Type 1 (Pointing): 2 in b4 => r89c2<>2
Empty Rectangle: 2 in b8 (r49c8) => r4c6<>2
Empty Rectangle: 9 in b2 (r39c1) => r9c4<>9
Discontinuous Nice Loop: 2 r9c9 -2- r9c1 =2= r7c1 =7= r7c7 =4= ... | Extreme |
sudoku_normal_hard_126 | ..6..9.2..4.36.5..1..........8..5..23...468...6.1.87..6......89..5..72......8.... | 586479123249361578173852946718935462352746891964128735627514389835697214491283657 | sudoku_normal_hard_126 | 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 . 2 .
. 4 . 3 6 . 5 . .
1 . . . . . . . .
. . 8 . . 5 . . 2
3 . . . 4 6 8 . .
. 6 . 1 . 8 7 . .
6 . . . . . . 8 9
. . 5 . . 7 2 . .
. . . . 8 . . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 586479123249361578173852946718935462352746891964128735627514389835697214491283657 #1 Extreme (11332)
Locked Candidates Type 1 (Pointing): 3 in b5 => r78c5<>3
Locked Candidates Type 1 (Pointing): 5 in b9 => r9c4<>5
Locked Candidates Type 1 (Pointing): 7 in b9 => r9c123<>7
Hidden Pair: 5,7 in r9c89 => r9c89<>... | Extreme |
sudoku_normal_hard_127 | 9.....4.7.7.42.89.4.8..7....4..691.2..6.7.349...1..76.....3.51.5.........2...8..4 | 912586437675423891438917625847369152156872349293145768789234516564791283321658974 | sudoku_normal_hard_127 | 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 . 7
. 7 . 4 2 . 8 9 .
4 . 8 . . 7 . . .
. 4 . . 6 9 1 . 2
. . 6 . 7 . 3 4 9
. . . 1 . . 7 6 .
. . . . 3 . 5 1 .
5 . . . . . . . .
. 2 . . . 8 . . 4 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 912586437675423891438917625847369152156872349293145768789234516564791283321658974 #1 Extreme (5992)
Hidden Single: r1c3=2
Locked Candidates Type 1 (Pointing): 2 in b9 => r8c46<>2
Forcing Chain Contradiction in c1 => r3c9<>6
r3c9=6 r7c9<>6 r7c9=8 r6c9<>8 r4c8=8 r4c1<>8
r3c9=6 r3c9<>1 r2c9=1 r2c13<>1 r13c2=1... | Extreme |
sudoku_normal_hard_128 | .7.9..6.2..3.6579.9.6.27.8...7.9.8166..7..923.9...6547.6..7.2.97....9.6.4.96...7. | 874913652213865794956427381347592816685741923192386547568174239731259468429638175 | sudoku_normal_hard_128 | 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 . . 6 . 2
. . 3 . 6 5 7 9 .
9 . 6 . 2 7 . 8 .
. . 7 . 9 . 8 1 6
6 . . 7 . . 9 2 3
. 9 . . . 6 5 4 7
. 6 . . 7 . 2 . 9
7 . . . . 9 . 6 .
4 . 9 6 . . . 7 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 874913652213865794956427381347592816685741923192386547568174239731259468429638175 #1 Extreme (5310)
Locked Candidates Type 1 (Pointing): 4 in b9 => r8c45<>4
X-Wing: 4 c35 r15 => r15c6,r5c2<>4
2-String Kite: 3 in r3c4,r7c8 (connected by r1c8,r3c7) => r7c4<>3
Finned Swordfish: 5 r359 c259 fr5c3 => r4c2<>5
... | Extreme |
sudoku_normal_hard_129 | ..5..23..21..7...59..5...2...2.1568.16.7..5.2.59.26.7.52...7..6..7.5..4..9.....5. | 745192368216873495938564721372415689164789532859326174523947816687251943491638257 | sudoku_normal_hard_129 | 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 3 . .
2 1 . . 7 . . . 5
9 . . 5 . . . 2 .
. . 2 . 1 5 6 8 .
1 6 . 7 . . 5 . 2
. 5 9 . 2 6 . 7 .
5 2 . . . 7 . . 6
. . 7 . 5 . . 4 .
. 9 . . . . . 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 745192368216873495938564721372415689164789532859326174523947816687251943491638257 #1 Extreme (13722)
Empty Rectangle: 3 in b5 (r57c8) => r7c4<>3
Finned Swordfish: 1 r368 c679 fr8c4 => r9c6<>1
Finned Franken Swordfish: 9 c67b6 r258 fr4c9 fr7c7 => r8c9<>9
Forcing Chain Contradiction in c4 => r1c1<>6
r1c1=6 ... | Extreme |
sudoku_normal_hard_130 | .896.2.172.1...9.6....9182...81...726..2.8149412.7968..23........4...2..8..92...1 | 389652417251487936746391825938146572675238149412579683123865794594713268867924351 | sudoku_normal_hard_130 | 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 9 6 . 2 . 1 7
2 . 1 . . . 9 . 6
. . . . 9 1 8 2 .
. . 8 1 . . . 7 2
6 . . 2 . 8 1 4 9
4 1 2 . 7 9 6 8 .
. 2 3 . . . . . .
. . 4 . . . 2 . .
8 . . 9 2 . . . 1 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 389652417251487936746391825938146572675238149412579683123865794594713268867924351 #1 Extreme (3188)
Naked Pair: 3,5 in r5c5,r6c4 => r4c56<>3, r4c56<>5
Swordfish: 4 r149 c567 => r2c56,r7c567<>4
Almost Locked Set XY-Wing: A=r7c15678 {156789}, B=r2368c4 {34578}, C=r125c5 {3458}, X,Y=4,8, Z=5,7 => r7c4<>5, r7c4<>7... | Extreme |
sudoku_normal_hard_131 | ..46..3..6...9..4..2...4..8..6.3...2.4..867..38...9.5...8.1...44..9...1.17...5... | 814672395635198247729354168596731482241586739387429651968213574452967813173845926 | sudoku_normal_hard_131 | 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 . . 3 . .
6 . . . 9 . . 4 .
. 2 . . . 4 . . 8
. . 6 . 3 . . . 2
. 4 . . 8 6 7 . .
3 8 . . . 9 . 5 .
. . 8 . 1 . . . 4
4 . . 9 . . . 1 .
1 7 . . . 5 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 814672395635198247729354168596731482241586739387429651968213574452967813173845926 #1 Extreme (4998)
Hidden Single: r1c1=8
Locked Candidates Type 1 (Pointing): 5 in b5 => r23c4<>5
Finned Swordfish: 1 r356 c347 fr5c9 fr6c9 => r4c7<>1
Almost Locked Set XZ-Rule: A=r4c6 {17}, B=r1c56,r3c5 {1257}, X=1, Z=7 => r2c... | Extreme |
sudoku_normal_hard_132 | 6.....8.2.728..46..1.6..57...17...2.23918675476...4....9..3...71..9...8...7.6...5 | 645379812972815463813642579451793628239186754768524931596238147124957386387461295 | sudoku_normal_hard_132 | 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 . 2
. 7 2 8 . . 4 6 .
. 1 . 6 . . 5 7 .
. . 1 7 . . . 2 .
2 3 9 1 8 6 7 5 4
7 6 . . . 4 . . .
. 9 . . 3 . . . 7
1 . . 9 . . . 8 .
. . 7 . 6 . . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 645379812972815463813642579451793628239186754768524931596238147124957386387461295 #1 Medium (600)
Locked Candidates Type 1 (Pointing): 1 in b8 => r12c6<>1
Naked Triple: 3,4,5 in r1c234 => r1c5<>4, r1c56<>5, r1c68<>3
Locked Candidates Type 1 (Pointing): 3 in b3 => r468c9<>3
Naked Single: r8c9=6
Hidden Sin... | Medium |
sudoku_normal_hard_133 | 4.8...6.2.25...4..69.4...582.9.4.56..86.5.21454.....89..4.....6..2.31.458....4.2. | 438517692125896437697423158279148563386759214541362789914285376762931845853674921 | sudoku_normal_hard_133 | 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 . . . 6 . 2
. 2 5 . . . 4 . .
6 9 . 4 . . . 5 8
2 . 9 . 4 . 5 6 .
. 8 6 . 5 . 2 1 4
5 4 . . . . . 8 9
. . 4 . . . . . 6
. . 2 . 3 1 . 4 5
8 . . . . 4 . 2 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 438517692125896437697423158279148563386759214541362789914285376762931845853674921 #1 Extreme (3882)
Locked Candidates Type 1 (Pointing): 9 in b3 => r7c8<>9
Skyscraper: 1 in r7c1,r9c9 (connected by r2c19) => r7c7,r9c23<>1
Finned X-Wing: 1 r14 c24 fr1c5 => r2c4<>1
Forcing Chain Contradiction in r3 => r4c6<>3
... | Extreme |
sudoku_normal_hard_134 | 52...7..387.31.5..9134567..638...9.1...9..3...9213...5367........96.3....8.7..639 | 526897413874312596913456728638275941451968372792134865367529184149683257285741639 | sudoku_normal_hard_134 | 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 . . . 7 . . 3
8 7 . 3 1 . 5 . .
9 1 3 4 5 6 7 . .
6 3 8 . . . 9 . 1
. . . 9 . . 3 . .
. 9 2 1 3 . . . 5
3 6 7 . . . . . .
. . 9 6 . 3 . . .
. 8 . 7 . . 6 3 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 526897413874312596913456728638275941451968372792134865367529184149683257285741639 #1 Easy (248)
Naked Single: r1c4=8
Naked Single: r1c5=9
Full House: r2c6=2
Hidden Single: r5c5=6
Hidden Single: r6c8=6
Hidden Single: r2c8=9
Hidden Single: r7c6=9
Hidden Single: r2c9=6
Full House: r2c3=4
Full... | Easy |
sudoku_normal_hard_135 | 1293.756.3.4...7987.8..9213983.1.42..4..9..3....8.3.5.......3.....63....832...671 | 129387564364521798758469213983715426541296837276843159695178342417632985832954671 | sudoku_normal_hard_135 | 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 9 3 . 7 5 6 .
3 . 4 . . . 7 9 8
7 . 8 . . 9 2 1 3
9 8 3 . 1 . 4 2 .
. 4 . . 9 . . 3 .
. . . 8 . 3 . 5 .
. . . . . . 3 . .
. . . 6 3 . . . .
8 3 2 . . . 6 7 1 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 129387564364521798758469213983715426541296837276843159695178342417632985832954671 #1 Easy (188)
Full House: r1c9=4
Full House: r1c5=8
Hidden Single: r5c7=8
Naked Single: r8c7=9
Full House: r6c7=1
Hidden Single: r6c5=4
Naked Single: r9c5=5
Naked Single: r3c5=6
Naked Single: r9c6=4
Full Hous... | Easy |
sudoku_normal_hard_136 | ..65..1...2......9....9.24.65.1....8..1.859..78..6.5......43....6......2..86..73. | 936524187524718369817396245659137428341285976782469513275843691463971852198652734 | sudoku_normal_hard_136 | 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 5 . . 1 . .
. 2 . . . . . . 9
. . . . 9 . 2 4 .
6 5 . 1 . . . . 8
. . 1 . 8 5 9 . .
7 8 . . 6 . 5 . .
. . . . 4 3 . . .
. 6 . . . . . . 2
. . 8 6 . . 7 3 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 936524187524718369817396245659137428341285976782469513275843691463971852198652734 #1 Extreme (6400)
Locked Candidates Type 1 (Pointing): 9 in b4 => r78c3<>9
Empty Rectangle: 3 in b5 (r24c7) => r2c4<>3
Forcing Chain Contradiction in r4 => r4c6<>2
r4c6=2 r4c6<>9 r4c3=9 r4c3<>4
r4c6=2 r4c6<>4
r4c6=2 r56c4<>... | Extreme |
sudoku_normal_hard_137 | .3.4...2.1...9.5....7..2.......8..1.8..2...59..69..8....13...7.7...6.1...4...7..5 | 935418726162793584487652391293586417874231659516974832651349278729865143348127965 | sudoku_normal_hard_137 | 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 . . . 2 .
1 . . . 9 . 5 . .
. . 7 . . 2 . . .
. . . . 8 . . 1 .
8 . . 2 . . . 5 9
. . 6 9 . . 8 . .
. . 1 3 . . . 7 .
7 . . . 6 . 1 . .
. 4 . . . 7 . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 935418726162793584487652391293586417874231659516974832651349278729865143348127965 #1 Extreme (16792)
Finned Swordfish: 2 r268 c239 fr6c1 => r4c23<>2
Forcing Chain Contradiction in r1 => r7c7<>6
r7c7=6 r7c2<>6 r79c1=6 r1c1<>6
r7c7=6 r5c7<>6 r5c6=6 r1c6<>6
r7c7=6 r1c7<>6
r7c7=6 r9c8<>6 r23c8=6 r1c9<>6
Fo... | Extreme |
sudoku_normal_hard_138 | 9....471..719....3.5.........32..4..7...4923..2.....5.6..79.....8.46.9.......8... | 968354712271986543354172896893215467715649238426837159642791385587463921139528674 | sudoku_normal_hard_138 | 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 7 1 .
. 7 1 9 . . . . 3
. 5 . . . . . . .
. . 3 2 . . 4 . .
7 . . . 4 9 2 3 .
. 2 . . . . . 5 .
6 . . 7 9 . . . .
. 8 . 4 6 . 9 . .
. . . . . 8 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 968354712271986543354172896893215467715649238426837159642791385587463921139528674 #1 Extreme (14122)
Locked Candidates Type 2 (Claiming): 4 in c2 => r79c3,r9c1<>4
XYZ-Wing: 2/5/7 in r78c3,r8c8 => r8c1<>2
Discontinuous Nice Loop: 2 r2c8 -2- r8c8 -7- r8c3 =7= r9c3 =9= r6c3 =4= r6c1 -4- r2c1 =4= r2c8 => r2c8<>2
... | Extreme |
sudoku_normal_hard_139 | .2..4..6.5..73.4.......8..7...9.4.8.4..87.3.9819..3.....5.6....6..4.7..5.7.3..6.. | 728549163596731428143628957367914582452876319819253746935162874681497235274385691 | sudoku_normal_hard_139 | 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 . . 6 .
5 . . 7 3 . 4 . .
. . . . . 8 . . 7
. . . 9 . 4 . 8 .
4 . . 8 7 . 3 . 9
8 1 9 . . 3 . . .
. . 5 . 6 . . . .
6 . . 4 . 7 . . 5
. 7 . 3 . . 6 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 728549163596731428143628957367914582452876319819253746935162874681497235274385691 #1 Extreme (11922)
Locked Candidates Type 1 (Pointing): 7 in b4 => r4c7<>7
Discontinuous Nice Loop: 1 r4c9 -1- r4c5 =1= r5c6 =6= r6c4 -6- r6c9 =6= r4c9 => r4c9<>1
Forcing Chain Contradiction in r4 => r3c5<>5
r3c5=5 r13c4<>5 r6c... | Extreme |
sudoku_normal_hard_140 | ..8....6.9..38...7.....58..2.4539..6.19467.2.3..128..96.........23.9.6...97.....2 | 158972463946381257732645891274539186819467325365128749681253974523794618497816532 | sudoku_normal_hard_140 | 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 . . . . 6 .
9 . . 3 8 . . . 7
. . . . . 5 8 . .
2 . 4 5 3 9 . . 6
. 1 9 4 6 7 . 2 .
3 . . 1 2 8 . . 9
6 . . . . . . . .
. 2 3 . 9 . 6 . .
. 9 7 . . . . . 2 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 158972463946381257732645891274539186819467325365128749681253974523794618497816532 #1 Extreme (12270)
Locked Candidates Type 1 (Pointing): 7 in b4 => r13c2<>7
2-String Kite: 8 in r5c9,r7c2 (connected by r4c2,r5c1) => r7c9<>8
Forcing Chain Verity => r1c4<>7
r7c2=8 r4c2<>8 r4c8=8 r5c9<>8 r8c9=8 r8c4<>8 r8c4=7 r... | Extreme |
sudoku_normal_hard_141 | 7..2..6....8.36.......7..5..7...2.45..97.5..12...4.7..31.4....9.8.......6....34.. | 745281693928536174163974258876312945439765821251849736317428569584697312692153487 | sudoku_normal_hard_141 | 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 . . 2 . . 6 . .
. . 8 . 3 6 . . .
. . . . 7 . . 5 .
. 7 . . . 2 . 4 5
. . 9 7 . 5 . . 1
2 . . . 4 . 7 . .
3 1 . 4 . . . . 9
. 8 . . . . . . .
6 . . . . 3 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 745281693928536174163974258876312945439765821251849736317428569584697312692153487 #1 Extreme (12142)
Turbot Fish: 5 r1c5 =5= r2c4 -5- r2c1 =5= r8c1 => r8c5<>5
Finned Swordfish: 5 r169 c235 fr9c4 => r7c5<>5
Forcing Chain Contradiction in r4 => r4c4<>8
r4c4=8 r5c5<>8 r5c5=6 r4c45<>6 r4c3=6 r4c3<>3
r4c4=8 r4c... | Extreme |
sudoku_normal_hard_142 | .2.1...6.7.4.6..2....2..7...6..1.4..3718456924.56.2......4.1.36.....8.49.4..261.. | 928174365714563928653289714862917453371845692495632871287491536136758249549326187 | sudoku_normal_hard_142 | 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 . . . 6 .
7 . 4 . 6 . . 2 .
. . . 2 . . 7 . .
. 6 . . 1 . 4 . .
3 7 1 8 4 5 6 9 2
4 . 5 6 . 2 . . .
. . . 4 . 1 . 3 6
. . . . . 8 . 4 9
. 4 . . 2 6 1 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 928174365714563928653289714862917453371845692495632871287491536136758249549326187 #1 Extreme (4826)
Locked Candidates Type 1 (Pointing): 7 in b9 => r9c34<>7
Hidden Pair: 1,6 in r38c1 => r38c1<>5, r3c1<>8, r3c1<>9, r8c1<>2
Forcing Chain Contradiction in r1 => r2c4<>3
r2c4=3 r9c4<>3 r9c3=3 r1c3<>3
r2c4=3 r1c... | Extreme |
sudoku_normal_hard_143 | 1...8......9..76..65.2.....8..1.....32.458.....4..6..37......19.....43.8..3...7.. | 147689532239547681658231974875193246326458197914726853782365419561974328493812765 | sudoku_normal_hard_143 | 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 . . 7 6 . .
6 5 . 2 . . . . .
8 . . 1 . . . . .
3 2 . 4 5 8 . . .
. . 4 . . 6 . . 3
7 . . . . . . 1 9
. . . . . 4 3 . 8
. . 3 . . . 7 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 147689532239547681658231974875193246326458197914726853782365419561974328493812765 #1 Extreme (6638)
Hidden Single: r1c4=6
Locked Candidates Type 2 (Claiming): 9 in r5 => r4c78,r6c78<>9
Finned X-Wing: 4 r17 c27 fr1c8 fr1c9 => r3c7<>4
Discontinuous Nice Loop: 4 r2c8 -4- r2c1 -2- r1c3 -7- r3c3 -8- r2c2 =8= r2c... | Extreme |
sudoku_normal_hard_144 | 2.8.6...419.8.4..2.....2.8.78.24.5.6...35847..4.7.6.28...42...7..7.8.24....6.7..5 | 278963154195874632436512789783241596962358471541796328319425867657189243824637915 | sudoku_normal_hard_144 | 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 . . . 4
1 9 . 8 . 4 . . 2
. . . . . 2 . 8 .
7 8 . 2 4 . 5 . 6
. . . 3 5 8 4 7 .
. 4 . 7 . 6 . 2 8
. . . 4 2 . . . 7
. . 7 . 8 . 2 4 .
. . . 6 . 7 . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 278963154195874632436512789783241596962358471541796328319425867657189243824637915 #1 Extreme (5488)
Locked Candidates Type 1 (Pointing): 6 in b9 => r7c123<>6
Forcing Net Contradiction in r2c5 => r6c1<>9
r6c1=9 (r6c1<>5 r6c3=5 r2c3<>5 r2c8=5 r2c8<>3) (r6c7<>9) r6c5<>9 r6c5=1 r6c7<>1 r6c7=3 (r2c7<>3) r4c8<>3 r4c3... | Extreme |
sudoku_normal_hard_145 | ..8..6..32..35......5.4..1....2..7.1.6.4198.55.1.7..4.1...9...7..9...1.4.5.....9. | 948126573216357489375948612894265731763419825521873946182594367639782154457631298 | sudoku_normal_hard_145 | 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 . . 6 . . 3
2 . . 3 5 . . . .
. . 5 . 4 . . 1 .
. . . 2 . . 7 . 1
. 6 . 4 1 9 8 . 5
5 . 1 . 7 . . 4 .
1 . . . 9 . . . 7
. . 9 . . . 1 . 4
. 5 . . . . . 9 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 948126573216357489375948612894265731763419825521873946182594367639782154457631298 #1 Extreme (10496)
Naked Single: r1c5=2
Hidden Single: r4c6=5
Locked Candidates Type 1 (Pointing): 9 in b6 => r6c2<>9
Forcing Chain Contradiction in r7 => r2c3<>4
r2c3=4 r2c3<>6 r3c1=6 r3c1<>3 r3c2=3 r7c2<>3
r2c3=4 r4c3<>4... | Extreme |
sudoku_normal_hard_146 | 4.62..8.7..8.......3..8..6......6...641.5....9..7..4.6..4.7.1.9.791....21...29... | 496235817518697243732481965387946521641352798925718436264573189879164352153829674 | sudoku_normal_hard_146 | 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 2 . . 8 . 7
. . 8 . . . . . .
. 3 . . 8 . . 6 .
. . . . . 6 . . .
6 4 1 . 5 . . . .
9 . . 7 . . 4 . 6
. . 4 . 7 . 1 . 9
. 7 9 1 . . . . 2
1 . . . 2 9 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 496235817518697243732481965387946521641352798925718436264573189879164352153829674 #1 Extreme (12200)
Locked Candidates Type 1 (Pointing): 7 in b4 => r4c78<>7
Naked Triple: 2,5,7 in r23c1,r3c3 => r12c2<>5, r2c2<>2
Empty Rectangle: 9 in b5 (r3c47) => r4c7<>9
Grouped Discontinuous Nice Loop: 4 r2c6 -4- r2c89 =... | Extreme |
sudoku_normal_hard_147 | ....4..1....9.27.....6.......6..3.....276.9..8......5..1..5...3..3..92..4......8. | 978345612651982734324671598146593827532768941897124356219856473783419265465237189 | sudoku_normal_hard_147 | 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 .
. . . 9 . 2 7 . .
. . . 6 . . . . .
. . 6 . . 3 . . .
. . 2 7 6 . 9 . .
8 . . . . . . 5 .
. 1 . . 5 . . . 3
. . 3 . . 9 2 . .
4 . . . . . . 8 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 978345612651982734324671598146593827532768941897124356219856473783419265465237189 #1 Extreme (24946)
Grouped Discontinuous Nice Loop: 5 r1c1 -5- r2c123 =5= r2c9 -5- r8c9 =5= r8c12 -5- r9c3 =5= r123c3 -5- r1c1 => r1c1<>5
Grouped Discontinuous Nice Loop: 5 r1c2 -5- r2c123 =5= r2c9 -5- r8c9 =5= r8c12 -5- r9c3 =5= r1... | Extreme |
sudoku_normal_hard_148 | 6.472......54.6...7..39..4697.65...4.5293476.4.6.7295..6.5..4...49.6713...7.4.6.. | 694725813315486279728391546971658324852934761436172958263519487549867132187243695 | sudoku_normal_hard_148 | 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 7 2 . . . .
. . 5 4 . 6 . . .
7 . . 3 9 . . 4 6
9 7 . 6 5 . . . 4
. 5 2 9 3 4 7 6 .
4 . 6 . 7 2 9 5 .
. 6 . 5 . . 4 . .
. 4 9 . 6 7 1 3 .
. . 7 . 4 . 6 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 694725813315486279728391546971658324852934761436172958263519487549867132187243695 #1 Extreme (6136)
Locked Candidates Type 1 (Pointing): 5 in b9 => r1c9<>5
Naked Triple: 1,2,8 in r7c5,r89c4 => r79c6<>1, r79c6<>8
Empty Rectangle: 3 in b1 (r6c29) => r2c9<>3
Finned Jellyfish: 8 r5689 c1249 fr9c8 => r7c9<>8
... | Extreme |
sudoku_normal_hard_149 | ...74.19.4...182.7.7.2.9.485........3.71.28...2...4..99.4.27.81...48.97.78.9.1... | 832745196495618237671239548549863712367192854128574369954327681213486975786951423 | sudoku_normal_hard_149 | 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 . 1 9 .
4 . . . 1 8 2 . 7
. 7 . 2 . 9 . 4 8
5 . . . . . . . .
3 . 7 1 . 2 8 . .
. 2 . . . 4 . . 9
9 . 4 . 2 7 . 8 1
. . . 4 8 . 9 7 .
7 8 . 9 . 1 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | hard | 832745196495618237671239548549863712367192854128574369954327681213486975786951423 #1 Extreme (21718) bf
Naked Triple: 3,5,6 in r1c269 => r1c13<>6, r1c3<>3, r1c3<>5
Brute Force: r5c5=9
Locked Candidates Type 1 (Pointing): 5 in b5 => r6c78<>5
Almost Locked Set XZ-Rule: A=r4c4567 {34678}, B=r5c89 {456}, X=4, Z... | Extreme |
sudoku_normal_extremely_hard_0 | 7..6....8...9..5....6.4..3.23...8.....4...6.....7...91.2..3.4....1..9...8....1..5 | 745613928312987546986542137239168754174395682658724391527836419461259873893471265 | sudoku_normal_extremely_hard_0 | 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
. . . 9 . . 5 . .
. . 6 . 4 . . 3 .
2 3 . . . 8 . . .
. . 4 . . . 6 . .
. . . 7 . . . 9 1
. 2 . . 3 . 4 . .
. . 1 . . 9 . . .
8 . . . . 1 . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 745613928312987546986542137239168754174395682658724391527836419461259873893471265 #1 Easy (268)
Naked Single: r4c7=7
Naked Single: r4c9=4
Naked Single: r4c8=5
Naked Single: r4c3=9
Naked Single: r4c4=1
Full House: r4c5=6
Hidden Single: r5c4=3
Naked Single: r5c9=2
Naked Single: r5c6=5
Naked ... | Easy |
sudoku_normal_extremely_hard_1 | ..3..5....7.3...2.8...6.4...1...8..5..8.2.6..3..9...1...6.7...9.2...9.4....4..1.. | 243815967675394821891762453912648735758123694364957218436271589127589346589436172 | sudoku_normal_extremely_hard_1 | 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 . . .
. 7 . 3 . . . 2 .
8 . . . 6 . 4 . .
. 1 . . . 8 . . 5
. . 8 . 2 . 6 . .
3 . . 9 . . . 1 .
. . 6 . 7 . . . 9
. 2 . . . 9 . 4 .
. . . 4 . . 1 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 243815967675394821891762453912648735758123694364957218436271589127589346589436172 #1 Medium (464)
Hidden Pair: 3,8 in r79c2 => r7c2<>4, r79c2<>5, r9c2<>9
Hidden Single: r7c1=4
Locked Candidates Type 1 (Pointing): 1 in b7 => r8c45<>1
Locked Candidates Type 2 (Claiming): 1 in c5 => r13c4,r23c6<>1
Naked Sin... | Medium |
sudoku_normal_extremely_hard_2 | 89......55..4........38.2...71..2.....6.7.1.....6..38...7.69........1..91......36 | 893127645512496873764385291371852964486973152925614387237569418648731529159248736 | sudoku_normal_extremely_hard_2 | 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 9 . . . . . . 5
5 . . 4 . . . . .
. . . 3 8 . 2 . .
. 7 1 . . 2 . . .
. . 6 . 7 . 1 . .
. . . 6 . . 3 8 .
. . 7 . 6 9 . . .
. . . . . 1 . . 9
1 . . . . . . 3 6 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 893127645512496873764385291371852964486973152925614387237569418648731529159248736 #1 Easy (224)
Naked Single: r3c3=4
Naked Single: r4c9=4
Naked Single: r5c9=2
Naked Single: r6c9=7
Naked Single: r3c9=1
Naked Single: r3c2=6
Naked Single: r7c9=8
Full House: r2c9=3
Naked Single: r3c1=7
Naked S... | Easy |
sudoku_normal_extremely_hard_3 | .6..8..1.1....2..3..75..9..2....91...3.....7...12....8..4..87..9..3....1.1..4..5. | 462983517195472683387516924248739165639851472751264398524198736976325841813647259 | sudoku_normal_extremely_hard_3 | 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 . . 1 .
1 . . . . 2 . . 3
. . 7 5 . . 9 . .
2 . . . . 9 1 . .
. 3 . . . . . 7 .
. . 1 2 . . . . 8
. . 4 . . 8 7 . .
9 . . 3 . . . . 1
. 1 . . 4 . . 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 462983517195472683387516924248739165639851472751264398524198736976325841813647259 #1 Hard (590)
Hidden Single: r1c9=7
Locked Candidates Type 1 (Pointing): 5 in b3 => r56c7<>5
Swordfish: 2 r159 c379 => r37c9,r8c37<>2
Hidden Pair: 2,3 in r19c3 => r1c3<>5, r1c3<>9, r9c3<>6, r9c3<>8
Hidden Single: r1c4=9
... | Hard |
sudoku_normal_extremely_hard_4 | ...1...2...3.4.8..9.1..7.3..6.5....8..5...3..2....4.7..5.2..6.1..7.5.4...8...9... | 876135924523946817941827536769513248415782369238694175354278691697351482182469753 | sudoku_normal_extremely_hard_4 | 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 .
. . 3 . 4 . 8 . .
9 . 1 . . 7 . 3 .
. 6 . 5 . . . . 8
. . 5 . . . 3 . .
2 . . . . 4 . 7 .
. 5 . 2 . . 6 . 1
. . 7 . 5 . 4 . .
. 8 . . . 9 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 876135924523946817941827536769513248415782369238694175354278691697351482182469753 #1 Easy (340)
Naked Single: r3c7=5
Naked Single: r9c8=5
Hidden Single: r2c8=1
Hidden Single: r7c5=7
Hidden Single: r9c3=2
Naked Single: r9c7=7
Naked Single: r1c7=9
Naked Single: r9c9=3
Naked Single: r6c7=1
Fu... | Easy |
sudoku_normal_extremely_hard_5 | .54....713..5....68...79....9....8....7.8.1....2....3....12...99....5..462....75. | 254836971379512486816479523193657842467283195582941637745128369938765214621394758 | sudoku_normal_extremely_hard_5 | 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 4 . . . . 7 1
3 . . 5 . . . . 6
8 . . . 7 9 . . .
. 9 . . . . 8 . .
. . 7 . 8 . 1 . .
. . 2 . . . . 3 .
. . . 1 2 . . . 9
9 . . . . 5 . . 4
6 2 . . . . 7 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 254836971379512486816479523193657842467283195582941637745128369938765214621394758 #1 Easy (236)
Naked Single: r1c1=2
Hidden Single: r2c8=8
Naked Single: r7c8=6
Naked Single: r7c7=3
Naked Single: r1c7=9
Naked Single: r8c7=2
Naked Single: r9c9=8
Full House: r8c8=1
Naked Single: r2c7=4
Naked ... | Easy |
sudoku_normal_extremely_hard_6 | ..92.7...6...9..5..3......4..1..82...2..6..4...35..7..3......6..8..3...1...8.95.. | 149257683678493152532186974461378295725961348893524716354712869987635421216849537 | sudoku_normal_extremely_hard_6 | 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 2 . 7 . . .
6 . . . 9 . . 5 .
. 3 . . . . . . 4
. . 1 . . 8 2 . .
. 2 . . 6 . . 4 .
. . 3 5 . . 7 . .
3 . . . . . . 6 .
. 8 . . 3 . . . 1
. . . 8 . 9 5 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 149257683678493152532186974461378295725961348893524716354712869987635421216849537 #1 Medium (474)
Locked Candidates Type 1 (Pointing): 3 in b2 => r2c79<>3
Locked Candidates Type 1 (Pointing): 6 in b2 => r3c7<>6
Hidden Single: r1c7=6
Hidden Single: r5c7=3
Naked Single: r4c8=9
Naked Single: r5c6=1
Hi... | Medium |
sudoku_normal_extremely_hard_7 | ..31...52.....9...8...4...6.8...27....1...4....96...8.1...9...8...2.....67...83.. | 493176852567829134812345976386452791251987463749631285125793648938264517674518329 | sudoku_normal_extremely_hard_7 | 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 . . . 5 2
. . . . . 9 . . .
8 . . . 4 . . . 6
. 8 . . . 2 7 . .
. . 1 . . . 4 . .
. . 9 6 . . . 8 .
1 . . . 9 . . . 8
. . . 2 . . . . .
6 7 . . . 8 3 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 493176852567829134812345976386452791251987463749631285125793648938264517674518329 #1 Medium (568)
Hidden Single: r2c5=2
Hidden Single: r8c3=8
Locked Triple: 1,8,9 in r123c7 => r2c89,r3c8,r68c7<>1, r3c8,r8c7<>9
Locked Candidates Type 1 (Pointing): 6 in b2 => r1c2<>6
Locked Candidates Type 1 (Pointing): 4 ... | Medium |
sudoku_normal_extremely_hard_8 | ..6..4..9.7..1.8..8..5...7..1..2.3..4.......8..9.6..5..5...2..1..7.5..8.3..9..4.. | 126874539573219846894536172615428397432795618789163254958342761247651983361987425 | sudoku_normal_extremely_hard_8 | 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 . . 9
. 7 . . 1 . 8 . .
8 . . 5 . . . 7 .
. 1 . . 2 . 3 . .
4 . . . . . . . 8
. . 9 . 6 . . 5 .
. 5 . . . 2 . . 1
. . 7 . 5 . . 8 .
3 . . 9 . . 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 126874539573219846894536172615428397432795618789163254958342761247651983361987425 #1 Easy (370)
Hidden Single: r7c5=4
Naked Single: r7c3=8
Naked Single: r4c3=5
Hidden Single: r9c9=5
Hidden Single: r1c7=5
Hidden Single: r8c2=4
Hidden Single: r6c2=8
Hidden Single: r5c6=5
Hidden Single: r2c1=5
... | Easy |
sudoku_normal_extremely_hard_9 | .4.1..8.51....7.3...9.3....6..2...7.....8.....7...5..2....7.4...5.9....89.2..6.1. | 347129865168457239529638741685291374293784156471365982816572493754913628932846517 | sudoku_normal_extremely_hard_9 | Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid.
" | None | 9 | 9 | . 4 . 1 . . 8 . 5
1 . . . . 7 . 3 .
. . 9 . 3 . . . .
6 . . 2 . . . 7 .
. . . . 8 . . . .
. 7 . . . 5 . . 2
. . . . 7 . 4 . .
. 5 . 9 . . . . 8
9 . 2 . . 6 . 1 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 347129865168457239529638741685291374293784156471365982816572493754913628932846517 #1 Medium (804)
Hidden Single: r5c4=7
Hidden Single: r6c8=8
Locked Candidates Type 1 (Pointing): 7 in b3 => r3c1<>7
Locked Candidates Type 1 (Pointing): 6 in b5 => r6c7<>6
Locked Candidates Type 1 (Pointing): 4 in b7 => r8c... | Medium |
sudoku_normal_extremely_hard_10 | .2...8..47..2..8....4.7..1..4.3....5..6...4..5....6.9..7..2.1....5..1..33..6...8. | 923168754751234869684975312148392675296857431537416298879523146465781923312649587 | sudoku_normal_extremely_hard_10 | 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 . . 4
7 . . 2 . . 8 . .
. . 4 . 7 . . 1 .
. 4 . 3 . . . . 5
. . 6 . . . 4 . .
5 . . . . 6 . 9 .
. 7 . . 2 . 1 . .
. . 5 . . 1 . . 3
3 . . 6 . . . 8 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 923168754751234869684975312148392675296857431537416298879523146465781923312649587 #1 Medium (520)
Hidden Single: r7c6=3
Locked Pair: 5,9 in r3c46 => r1c45,r2c56,r3c1279<>9, r1c45,r2c56,r3c27<>5
Naked Single: r1c4=1
Naked Single: r2c6=4
Hidden Single: r2c2=5
Hidden Single: r9c5=4
Hidden Single: r2c3... | Medium |
sudoku_normal_extremely_hard_11 | 9..1....6.3..9..8.5....42....1..3.4.6...8...7.9.2..8....27....4.5..6..7.3....5..8 | 928157436134692785576834291281573649643981527795246813862719354459368172317425968 | sudoku_normal_extremely_hard_11 | 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
. 3 . . 9 . . 8 .
5 . . . . 4 2 . .
. . 1 . . 3 . 4 .
6 . . . 8 . . . 7
. 9 . 2 . . 8 . .
. . 2 7 . . . . 4
. 5 . . 6 . . 7 .
3 . . . . 5 . . 8 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 928157436134692785576834291281573649643981527795246813862719354459368172317425968 #1 Medium (476)
Hidden Pair: 4,7 in r12c7 => r1c7<>3, r12c7<>5, r2c7<>1
Hidden Pair: 3,5 in r56c3 => r56c3<>4, r6c3<>7
Hidden Pair: 3,5 in r1c58 => r1c5<>2, r1c5<>7
Hidden Single: r9c5=2
Hidden Single: r8c9=2
Hidden Sing... | Medium |
sudoku_normal_extremely_hard_12 | 29...57....14...6.....3...2..4.5..1.1.......7.8..6.5..8...9.....2...36....75...94 | 296815743351472968478936152934257816165389427782164539843691275529743681617528394 | sudoku_normal_extremely_hard_12 | 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 7 . .
. . 1 4 . . . 6 .
. . . . 3 . . . 2
. . 4 . 5 . . 1 .
1 . . . . . . . 7
. 8 . . 6 . 5 . .
8 . . . 9 . . . .
. 2 . . . 3 6 . .
. . 7 5 . . . 9 4 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 296815743351472968478936152934257816165389427782164539843691275529743681617528394 #1 Easy (340)
Hidden Single: r4c9=6
Hidden Single: r1c8=4
Hidden Single: r5c7=4
Hidden Single: r6c6=4
Hidden Single: r8c5=4
Hidden Single: r7c2=4
Hidden Single: r6c4=1
Hidden Single: r3c1=4
Hidden Single: r2c5=7... | Easy |
sudoku_normal_extremely_hard_13 | ..6.3.8..4..2...7..5...6..1...1...9...5...4...9...5...7..8...1..6...9..3..3.4.2.. | 276931854431258976958476321327164598185392467694785132749823615862519743513647289 | sudoku_normal_extremely_hard_13 | 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 . 8 . .
4 . . 2 . . . 7 .
. 5 . . . 6 . . 1
. . . 1 . . . 9 .
. . 5 . . . 4 . .
. 9 . . . 5 . . .
7 . . 8 . . . 1 .
. 6 . . . 9 . . 3
. . 3 . 4 . 2 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 276931854431258976958476321327164598185392467694785132749823615862519743513647289 #1 Medium (498)
Hidden Single: r6c7=1
Hidden Single: r7c6=3
Locked Candidates Type 1 (Pointing): 2 in b8 => r456c5<>2
Naked Pair: 5,7 in r8c47 => r8c158<>5, r8c5<>7
Hidden Single: r9c1=5
Hidden Single: r1c8=5
Hidden S... | Medium |
sudoku_normal_extremely_hard_14 | 9....6..4..8....2..3..1.5..2..5...9...4.9.8...1...7..5..2.8..6..7....2..1..4....3 | 921856374548739126637214589263548791754691832819327645392185467475963218186472953 | sudoku_normal_extremely_hard_14 | 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 . . . . 6 . . 4
. . 8 . . . . 2 .
. 3 . . 1 . 5 . .
2 . . 5 . . . 9 .
. . 4 . 9 . 8 . .
. 1 . . . 7 . . 5
. . 2 . 8 . . 6 .
. 7 . . . . 2 . .
1 . . 4 . . . . 3 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 921856374548739126637214589263548791754691832819327645392185467475963218186472953 #1 Medium (534)
Hidden Single: r6c3=9
Hidden Single: r1c2=2
Hidden Single: r5c9=2
Hidden Single: r1c3=1
Hidden Single: r1c5=5
Locked Candidates Type 2 (Claiming): 5 in c3 => r7c12,r8c1,r9c2<>5
Hidden Single: r7c6=5
... | Medium |
sudoku_normal_extremely_hard_15 | .8...5..43..2..1....2.7..9..1....3..7..5.4..2..6....8..2..5.8....4..3..79..1...5. | 187935624395246178462871593219768345738514962546329781621457839854693217973182456 | sudoku_normal_extremely_hard_15 | 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
3 . . 2 . . 1 . .
. . 2 . 7 . . 9 .
. 1 . . . . 3 . .
7 . . 5 . 4 . . 2
. . 6 . . . . 8 .
. 2 . . 5 . 8 . .
. . 4 . . 3 . . 7
9 . . 1 . . . 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 187935624395246178462871593219768345738514962546329781621457839854693217973182456 #1 Medium (300)
Naked Pair: 1,6 in r17c1 => r38c1<>1, r38c1<>6
Hidden Single: r3c6=1
Hidden Single: r8c8=1
Naked Single: r5c8=6
Naked Single: r2c8=7
Naked Single: r5c7=9
Naked Single: r4c8=4
Naked Single: r4c9=5
... | Medium |
sudoku_normal_extremely_hard_16 | ..47..3..1....8..2..9.4..5..6...7...5...9...1...8...3..8..1.2..3..5....9..7..26.. | 854721396136958742729643158968137524573294861241865937685419273312576489497382615 | sudoku_normal_extremely_hard_16 | 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 . . 3 . .
1 . . . . 8 . . 2
. . 9 . 4 . . 5 .
. 6 . . . 7 . . .
5 . . . 9 . . . 1
. . . 8 . . . 3 .
. 8 . . 1 . 2 . .
3 . . 5 . . . . 9
. . 7 . . 2 6 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 854721396136958742729643158968137524573294861241865937685419273312576489497382615 #1 Medium (784)
Hidden Single: r8c5=7
Hidden Single: r9c5=8
Locked Candidates Type 1 (Pointing): 8 in b1 => r4c1<>8
Locked Candidates Type 1 (Pointing): 5 in b9 => r46c9<>5
Naked Triple: 1,4,8 in r8c78,r9c8 => r7c89,r9c9<>4... | Medium |
sudoku_normal_extremely_hard_17 | 4....5.9...7..1..2.3..2.6....5..9..1.........2..4..8....1.7..4.6..9..3...8.6....5 | 428765193567391482139824657845239761973186524216457839391578246654912378782643915 | sudoku_normal_extremely_hard_17 | 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 . 9 .
. . 7 . . 1 . . 2
. 3 . . 2 . 6 . .
. . 5 . . 9 . . 1
. . . . . . . . .
2 . . 4 . . 8 . .
. . 1 . 7 . . 4 .
6 . . 9 . . 3 . .
. 8 . 6 . . . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 428765193567391482139824657845239761973186524216457839391578246654912378782643915 #1 Easy (328)
Hidden Single: r2c5=9
Hidden Single: r7c9=6
Hidden Single: r5c4=1
Hidden Single: r2c7=4
Hidden Single: r3c6=4
Hidden Single: r2c2=6
Hidden Single: r1c5=6
Hidden Single: r3c1=1
Naked Single: r1c2=2
... | Easy |
sudoku_normal_extremely_hard_18 | ..49..8.......7.2.3...1..5..5...6..1..8...6..6..1...7..4..8...3.2.5.......7..94.. | 274953816581467329369218754452876931718395642693142578945781263826534197137629485 | sudoku_normal_extremely_hard_18 | 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 . . 8 . .
. . . . . 7 . 2 .
3 . . . 1 . . 5 .
. 5 . . . 6 . . 1
. . 8 . . . 6 . .
6 . . 1 . . . 7 .
. 4 . . 8 . . . 3
. 2 . 5 . . . . .
. . 7 . . 9 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 274953816581467329369218754452876931718395642693142578945781263826534197137629485 #1 Medium (628)
Locked Candidates Type 1 (Pointing): 4 in b3 => r56c9<>4
Locked Candidates Type 2 (Claiming): 4 in r6 => r4c45,r5c456<>4
Locked Candidates Type 2 (Claiming): 4 in c4 => r2c5,r3c6<>4
Naked Triple: 2,3,9 in r46c3... | Medium |
sudoku_normal_extremely_hard_19 | .4.6....71....3.9.9...8.2...3.2.......6.4.7.......9.5...1.7...6.9.8....18....1.4. | 248695137167423895953187264739256418516348729482719653321574986694832571875961342 | sudoku_normal_extremely_hard_19 | 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 . . . . 3 . 9 .
9 . . . 8 . 2 . .
. 3 . 2 . . . . .
. . 6 . 4 . 7 . .
. . . . . 9 . 5 .
. . 1 . 7 . . . 6
. 9 . 8 . . . . 1
8 . . . . 1 . 4 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 248695137167423895953187264739256418516348729482719653321574986694832571875961342 #1 Easy (344)
Hidden Single: r1c5=9
Hidden Single: r5c9=9
Hidden Single: r4c3=9
Hidden Single: r8c1=6
Hidden Single: r8c8=7
Hidden Single: r3c4=1
Hidden Single: r4c6=6
Hidden Single: r9c5=6
Hidden Single: r3c8=6... | Easy |
sudoku_normal_extremely_hard_20 | .9.1...2.2.7.4...8.....5.6...8.....3.6.....5.9.....8...2.6.....4...8.7.1.5...9.4. | 695138427217946538384725169548261973163897254972453816729614385436582791851379642 | sudoku_normal_extremely_hard_20 | 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 . . . 2 .
2 . 7 . 4 . . . 8
. . . . . 5 . 6 .
. . 8 . . . . . 3
. 6 . . . . . 5 .
9 . . . . . 8 . .
. 2 . 6 . . . . .
4 . . . 8 . 7 . 1
. 5 . . . 9 . 4 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 695138427217946538384725169548261973163897254972453816729614385436582791851379642 #1 Easy (228)
Naked Single: r8c2=3
Naked Single: r2c2=1
Naked Single: r8c6=2
Naked Single: r8c8=9
Naked Single: r8c4=5
Full House: r8c3=6
Naked Single: r2c8=3
Naked Single: r7c9=5
Naked Single: r9c3=1
Naked S... | Easy |
sudoku_normal_extremely_hard_21 | 2..5.1.....1.3.4...8.....2.4..8.9..1.5.....4.3..6.2..8.6.....8...3.7.2.....1.5..6 | 234591867671238459589764123426859371958317642317642598165923784893476215742185936 | sudoku_normal_extremely_hard_21 | 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 . 1 . . .
. . 1 . 3 . 4 . .
. 8 . . . . . 2 .
4 . . 8 . 9 . . 1
. 5 . . . . . 4 .
3 . . 6 . 2 . . 8
. 6 . . . . . 8 .
. . 3 . 7 . 2 . .
. . . 1 . 5 . . 6 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 234591867671238459589764123426859371958317642317642598165923784893476215742185936 #1 Easy (410)
Naked Single: r4c5=5
Naked Single: r5c5=1
Naked Single: r6c5=4
Hidden Single: r3c7=1
Hidden Single: r2c4=2
Hidden Single: r2c6=8
Hidden Single: r1c7=8
Hidden Single: r1c2=3
Hidden Single: r5c9=2
... | Easy |
sudoku_normal_extremely_hard_22 | ..3.5..7..1.8..3..9....7.6...2..6..4....4....1..2..5...9.1....8..7..8.3..8..9.7.. | 643952871715864392928317465532786914879541623164239587396175248457628139281493756 | sudoku_normal_extremely_hard_22 | 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 . . 7 .
. 1 . 8 . . 3 . .
9 . . . . 7 . 6 .
. . 2 . . 6 . . 4
. . . . 4 . . . .
1 . . 2 . . 5 . .
. 9 . 1 . . . . 8
. . 7 . . 8 . 3 .
. 8 . . 9 . 7 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 643952871715864392928317465532786914879541623164239587396175248457628139281493756 #1 Medium (504)
Hidden Single: r2c1=7
Hidden Single: r9c3=1
Hidden Single: r7c5=7
Locked Candidates Type 1 (Pointing): 8 in b3 => r45c7<>8
Locked Candidates Type 1 (Pointing): 3 in b7 => r45c1<>3
Locked Candidates Type 2... | Medium |
sudoku_normal_extremely_hard_23 | .5..9...1..3..7...4..8...6..3.1..2..6...5...8..2..4.1..8...5..2...6..3..1...4..9. | 257496831863517429419832567738169254641253978592784613386975142974621385125348796 | sudoku_normal_extremely_hard_23 | 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 . . . 1
. . 3 . . 7 . . .
4 . . 8 . . . 6 .
. 3 . 1 . . 2 . .
6 . . . 5 . . . 8
. . 2 . . 4 . 1 .
. 8 . . . 5 . . 2
. . . 6 . . 3 . .
1 . . . 4 . . 9 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 257496831863517429419832567738169254641253978592784613386975142974621385125348796 #1 Easy (294)
Hidden Single: r2c4=5
Hidden Single: r7c7=1
Hidden Single: r7c1=3
Naked Single: r7c5=7
Naked Single: r7c4=9
Naked Single: r7c8=4
Full House: r7c3=6
Hidden Single: r1c4=4
Hidden Single: r1c6=6
Hi... | Easy |
sudoku_normal_extremely_hard_24 | ..8.4..7.6..9..2.8.9...2...9..7..8...1.....5...7..9..6...1...3.4.5..6..2.3..7.5.. | 328641975654937218791582463963725841812463759547819326289154637475396182136278594 | sudoku_normal_extremely_hard_24 | 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 . 4 . . 7 .
6 . . 9 . . 2 . 8
. 9 . . . 2 . . .
9 . . 7 . . 8 . .
. 1 . . . . . 5 .
. . 7 . . 9 . . 6
. . . 1 . . . 3 .
4 . 5 . . 6 . . 2
. 3 . . 7 . 5 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 328641975654937218791582463963725841812463759547819326289154637475396182136278594 #1 Medium (400)
Hidden Single: r3c1=7
Hidden Single: r2c6=7
Locked Candidates Type 1 (Pointing): 1 in b7 => r9c89<>1
Locked Candidates Type 2 (Claiming): 9 in c8 => r7c79,r8c7,r9c9<>9
Naked Single: r9c9=4
Naked Single: r... | Medium |
sudoku_normal_extremely_hard_25 | ..8.3..6..1...9..76..7......8...41..5.......6..62...3......1..93..9...2..4..7.5.. | 478532961215469387639718254783654192524193876196287435857321649361945728942876513 | sudoku_normal_extremely_hard_25 | 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 . . 6 .
. 1 . . . 9 . . 7
6 . . 7 . . . . .
. 8 . . . 4 1 . .
5 . . . . . . . 6
. . 6 2 . . . 3 .
. . . . . 1 . . 9
3 . . 9 . . . 2 .
. 4 . . 7 . 5 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 478532961215469387639718254783654192524193876196287435857321649361945728942876513 #1 Medium (468)
Locked Candidates Type 2 (Claiming): 6 in r9 => r7c45,r8c56<>6
Hidden Single: r9c6=6
Hidden Single: r7c5=2
Hidden Single: r5c6=3
Hidden Single: r4c3=3
Hidden Single: r3c2=3
Hidden Single: r6c6=7
Nak... | Medium |
sudoku_normal_extremely_hard_26 | .3..4..6...4..5...9.....2...4.1....3..5.8.7..2....6.8...9.....6...7..5...1..2..9. | 832947165674215938951863247748192653165384729293576481329451876486739512517628394 | sudoku_normal_extremely_hard_26 | 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 .
. . 4 . . 5 . . .
9 . . . . . 2 . .
. 4 . 1 . . . . 3
. . 5 . 8 . 7 . .
2 . . . . 6 . 8 .
. . 9 . . . . . 6
. . . 7 . . 5 . .
. 1 . . 2 . . 9 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 832947165674215938951863247748192653165384729293576481329451876486739512517628394 #1 Medium (452)
Hidden Single: r4c7=6
Locked Pair: 7,8 in r4c13 => r4c56,r6c23<>7
Naked Single: r6c2=9
Naked Single: r5c2=6
Hidden Single: r6c5=7
Hidden Single: r5c9=9
Hidden Single: r8c9=2
Naked Single: r8c2=8
... | Medium |
sudoku_normal_extremely_hard_27 | .2.89....3....7.8...4...1..6..3...4...3.4.6...5...2..9..9...5...6.4....7....81.2. | 125894763396517284784236195672359841913748652458162379249673518861425937537981426 | sudoku_normal_extremely_hard_27 | 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 9 . . . .
3 . . . . 7 . 8 .
. . 4 . . . 1 . .
6 . . 3 . . . 4 .
. . 3 . 4 . 6 . .
. 5 . . . 2 . . 9
. . 9 . . . 5 . .
. 6 . 4 . . . . 7
. . . . 8 1 . 2 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 125894763396517284784236195672359841913748652458162379249673518861425937537981426 #1 Medium (524)
Hidden Single: r6c1=4
Hidden Single: r1c6=4
Locked Pair: 5,7 in r9c13 => r7c12,r9c24<>7, r8c13,r9c4<>5
Locked Candidates Type 1 (Pointing): 1 in b2 => r2c23<>1
Naked Single: r2c2=9
Hidden Single: r3c8=9
... | Medium |
sudoku_normal_extremely_hard_28 | 67...9..5..14.......3.7.8...4.7....8.16.2.95.5....1.6...8.5.1.......86..2..9...84 | 674189325851432796923576841349765218716824953582391467498657132135248679267913584 | sudoku_normal_extremely_hard_28 | 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 . . 5
. . 1 4 . . . . .
. . 3 . 7 . 8 . .
. 4 . 7 . . . . 8
. 1 6 . 2 . 9 5 .
5 . . . . 1 . 6 .
. . 8 . 5 . 1 . .
. . . . . 8 6 . .
2 . . 9 . . . 8 4 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 674189325851432796923576841349765218716824953582391467498657132135248679267913584 #1 Easy (368)
Hidden Single: r4c6=5
Hidden Single: r3c4=5
Hidden Single: r4c8=1
Hidden Single: r3c9=1
Hidden Single: r9c7=5
Naked Single: r9c3=7
Hidden Single: r8c1=1
Hidden Single: r9c5=1
Hidden Single: r5c6=4
... | Easy |
sudoku_normal_extremely_hard_29 | .1...6...3..5..9....5.8..2..6.9....3..7.2.1..4....7.8..2..7.6....9..3..1...4...5. | 214796538386542917795381426862915743937824165451637289523178694649253871178469352 | sudoku_normal_extremely_hard_29 | 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 . . . 6 . . .
3 . . 5 . . 9 . .
. . 5 . 8 . . 2 .
. 6 . 9 . . . . 3
. . 7 . 2 . 1 . .
4 . . . . 7 . 8 .
. 2 . . 7 . 6 . .
. . 9 . . 3 . . 1
. . . 4 . . . 5 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 214796538386542917795381426862915743937824165451637289523178694649253871178469352 #1 Easy (294)
Hidden Single: r2c8=1
Naked Single: r2c5=4
Naked Single: r2c6=2
Hidden Single: r5c8=6
Hidden Single: r8c4=2
Hidden Single: r7c8=9
Hidden Single: r6c4=6
Hidden Single: r7c3=3
Hidden Single: r1c8=3
... | Easy |
sudoku_normal_extremely_hard_30 | ..7.8...3.2...1.9....4..5..8...1..6...9...2...4..5...8..6..2....1.7...3.5...6.4.. | 457689123328571694961423587835214769179836245642957318786342951214795836593168472 | sudoku_normal_extremely_hard_30 | 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 . . . 3
. 2 . . . 1 . 9 .
. . . 4 . . 5 . .
8 . . . 1 . . 6 .
. . 9 . . . 2 . .
. 4 . . 5 . . . 8
. . 6 . . 2 . . .
. 1 . 7 . . . 3 .
5 . . . 6 . 4 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 457689123328571694961423587835214769179836245642957318786342951214795836593168472 #1 Easy (328)
Hidden Single: r3c5=2
Hidden Single: r1c8=2
Hidden Single: r1c1=4
Hidden Single: r5c8=4
Hidden Single: r2c9=4
Hidden Single: r8c3=4
Naked Single: r8c5=9
Naked Single: r8c1=2
Hidden Single: r7c5=4
... | Easy |
sudoku_normal_extremely_hard_31 | 81......6...8.52.......34..23...45......8......17...69..52.......71.8...4......78 | 813429756674815293952673481238964517796581342541732869185297634367148925429356178 | sudoku_normal_extremely_hard_31 | 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 . . . . . . 6
. . . 8 . 5 2 . .
. . . . . 3 4 . .
2 3 . . . 4 5 . .
. . . . 8 . . . .
. . 1 7 . . . 6 9
. . 5 2 . . . . .
. . 7 1 . 8 . . .
4 . . . . . . 7 8 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 813429756674815293952673481238964517796581342541732869185297634367148925429356178 #1 Easy (234)
Naked Single: r6c6=2
Naked Single: r6c1=5
Naked Single: r6c5=3
Naked Single: r6c7=8
Full House: r6c2=4
Naked Single: r4c8=1
Naked Single: r4c9=7
Naked Single: r5c7=3
Hidden Single: r1c8=5
Naked ... | Easy |
sudoku_normal_extremely_hard_32 | 6..5...4...1..9....5..8.7.1..7....3.5..2.4..6.2....9..3.9.7..8....4..2...1...8..3 | 678521349231749568954386721487965132593214876126837954349172685865493217712658493 | sudoku_normal_extremely_hard_32 | 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 . . 5 . . . 4 .
. . 1 . . 9 . . .
. 5 . . 8 . 7 . 1
. . 7 . . . . 3 .
5 . . 2 . 4 . . 6
. 2 . . . . 9 . .
3 . 9 . 7 . . 8 .
. . . 4 . . 2 . .
. 1 . . . 8 . . 3 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 678521349231749568954386721487965132593214876126837954349172685865493217712658493 #1 Easy (270)
Hidden Single: r5c8=7
Hidden Single: r2c5=4
Hidden Single: r4c9=2
Hidden Single: r7c6=2
Hidden Single: r8c9=7
Naked Single: r8c1=8
Naked Single: r8c2=6
Naked Single: r7c2=4
Naked Single: r8c3=5
... | Easy |
sudoku_normal_extremely_hard_33 | 8..34.6.1..7..1....63.7...99..4.5.1.6.5.2.9.3.2.9.6..45...1.46....2..1..2.4.53..7 | 852349671497561328163872549978435216645127983321986754539718462786294135214653897 | sudoku_normal_extremely_hard_33 | 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 . 6 . 1
. . 7 . . 1 . . .
. 6 3 . 7 . . . 9
9 . . 4 . 5 . 1 .
6 . 5 . 2 . 9 . 3
. 2 . 9 . 6 . . 4
5 . . . 1 . 4 6 .
. . . 2 . . 1 . .
2 . 4 . 5 3 . . 7 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 852349671497561328163872549978435216645127983321986754539718462786294135214653897 #1 Easy (184)
Naked Single: r4c3=8
Naked Single: r2c1=4
Naked Single: r9c7=8
Naked Single: r4c5=3
Naked Single: r6c3=1
Naked Single: r7c3=9
Naked Single: r3c1=1
Naked Single: r7c9=2
Naked Single: r8c9=5
Naked... | Easy |
sudoku_normal_extremely_hard_34 | 91...35....8.6..2....4...8..4...56..3...1...7..72...9..9...8....5..4.8....27...61 | 916823574478561923523497186249375618385916247167284395694138752751642839832759461 | sudoku_normal_extremely_hard_34 | 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 . . . 3 5 . .
. . 8 . 6 . . 2 .
. . . 4 . . . 8 .
. 4 . . . 5 6 . .
3 . . . 1 . . . 7
. . 7 2 . . . 9 .
. 9 . . . 8 . . .
. 5 . . 4 . 8 . .
. . 2 7 . . . 6 1 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 916823574478561923523497186249375618385916247167284395694138752751642839832759461 #1 Easy (246)
Naked Single: r1c4=8
Naked Single: r9c6=9
Hidden Single: r1c5=2
Hidden Single: r4c5=7
Hidden Single: r4c8=1
Naked Single: r4c3=9
Naked Single: r4c4=3
Naked Single: r6c5=8
Naked Single: r6c2=6
Na... | Easy |
sudoku_normal_extremely_hard_35 | ..4.6..5...3..7..28..9.....4..8..1...9..1..2...8..3..6.....5..12..1..9...6..7.5.. | 174362859953487612826951743432896175697514328518723496789645231245138967361279584 | sudoku_normal_extremely_hard_35 | 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 .
. . 3 . . 7 . . 2
8 . . 9 . . . . .
4 . . 8 . . 1 . .
. 9 . . 1 . . 2 .
. . 8 . . 3 . . 6
. . . . . 5 . . 1
2 . . 1 . . 9 . .
. 6 . . 7 . 5 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 174362859953487612826951743432896175697514328518723496789645231245138967361279584 #1 Medium (594)
Hidden Single: r7c7=2
Locked Candidates Type 1 (Pointing): 9 in b1 => r79c1<>9
Locked Candidates Type 1 (Pointing): 6 in b9 => r23c8<>6
Hidden Pair: 4,8 in r78c2 => r78c2<>3, r78c2<>7, r8c2<>5
Hidden Single:... | Medium |
sudoku_normal_extremely_hard_36 | ...2..6....4..6.8..5..8...33..1.2.5...9...7...2.9.4..17...2..4..9.3..1....8..5... | 871243695934516287652789413386172954149658732527934861763821549495367128218495376 | sudoku_normal_extremely_hard_36 | 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 . .
. . 4 . . 6 . 8 .
. 5 . . 8 . . . 3
3 . . 1 . 2 . 5 .
. . 9 . . . 7 . .
. 2 . 9 . 4 . . 1
7 . . . 2 . . 4 .
. 9 . 3 . . 1 . .
. . 8 . . 5 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 871243695934516287652789413386172954149658732527934861763821549495367128218495376 #1 Medium (750)
Locked Candidates Type 1 (Pointing): 7 in b5 => r1289c5<>7
Locked Candidates Type 1 (Pointing): 8 in b5 => r5c129<>8
Naked Pair: 6,7 in r4c35 => r4c29<>6, r4c2<>7
Locked Candidates Type 1 (Pointing): 7 in b4 =>... | Medium |
sudoku_normal_extremely_hard_37 | ..1.....9.4.2...6.8...3.4..182..4....6..7..9....5..381..4.1...6.9...3.7.5.....8.. | 621487539943251768857936412182394657365178294479562381734815926298643175516729843 | sudoku_normal_extremely_hard_37 | 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
. 4 . 2 . . . 6 .
8 . . . 3 . 4 . .
1 8 2 . . 4 . . .
. 6 . . 7 . . 9 .
. . . 5 . . 3 8 1
. . 4 . 1 . . . 6
. 9 . . . 3 . 7 .
5 . . . . . 8 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 621487539943251768857936412182394657365178294479562381734815926298643175516729843 #1 Easy (256)
Naked Single: r6c2=7
Naked Single: r4c8=5
Naked Single: r6c3=9
Naked Single: r4c9=7
Naked Single: r5c7=2
Naked Single: r6c1=4
Naked Single: r4c7=6
Full House: r5c9=4
Naked Single: r5c1=3
Full Ho... | Easy |
sudoku_normal_extremely_hard_38 | ....1.8...6.7....4..3..5..19..2...3...7.8.9...4...3..65..4..7..8....2.9...1.6.... | 752314869169728354483695271918246537637581942245973186526439718874152693391867425 | sudoku_normal_extremely_hard_38 | 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 . .
. 6 . 7 . . . . 4
. . 3 . . 5 . . 1
9 . . 2 . . . 3 .
. . 7 . 8 . 9 . .
. 4 . . . 3 . . 6
5 . . 4 . . 7 . .
8 . . . . 2 . 9 .
. . 1 . 6 . . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 752314869169728354483695271918246537637581942245973186526439718874152693391867425 #1 Easy (294)
Hidden Single: r1c9=9
Hidden Single: r2c1=1
Naked Single: r6c1=2
Hidden Single: r5c1=6
Hidden Single: r1c4=3
Hidden Single: r2c7=3
Hidden Single: r4c9=7
Hidden Single: r4c6=6
Naked Single: r1c6=4
... | Easy |
sudoku_normal_extremely_hard_39 | ..3.9.6..5..1......7...5..88.........12.3.76.........91..5...3......8..2..6.4.9.. | 283497651569183274471625398847956123912834765635712849128579436794368512356241987 | sudoku_normal_extremely_hard_39 | 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 . .
5 . . 1 . . . . .
. 7 . . . 5 . . 8
8 . . . . . . . .
. 1 2 . 3 . 7 6 .
. . . . . . . . 9
1 . . 5 . . . 3 .
. . . . . 8 . . 2
. . 6 . 4 . 9 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 283497651569183274471625398847956123912834765635712849128579436794368512356241987 #1 Easy (442)
Hidden Single: r3c3=1
Hidden Single: r5c9=5
Hidden Single: r5c4=8
Hidden Single: r7c9=6
Hidden Single: r1c8=5
Hidden Single: r8c7=5
Hidden Single: r1c2=8
Hidden Single: r2c5=8
Hidden Single: r9c2=5... | Easy |
sudoku_normal_extremely_hard_40 | .8..2......7..5.1.4.......3..9..1.5.3...4...1.7.5..6..6.......8.1.6..7......9..4. | 581923467237465819496718523869271354325846971174539682643157298912684735758392146 | sudoku_normal_extremely_hard_40 | 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 . . . .
. . 7 . . 5 . 1 .
4 . . . . . . . 3
. . 9 . . 1 . 5 .
3 . . . 4 . . . 1
. 7 . 5 . . 6 . .
6 . . . . . . . 8
. 1 . 6 . . 7 . .
. . . . 9 . . 4 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 581923467237465819496718523869271354325846971174539682643157298912684735758392146 #1 Hard (582)
Hidden Single: r9c1=7
Hidden Single: r9c9=6
X-Wing: 5 c19 r18 => r1c37,r8c35<>5
Hidden Single: r7c5=5
Hidden Single: r3c5=1
Hidden Single: r4c5=7
Hidden Single: r1c9=7
Hidden Single: r5c8=7
Hidden ... | Hard |
sudoku_normal_extremely_hard_41 | .7.6..5.9....4....3.2..8.7....1..8...9.....6...5..2....6.8..3.1....9....7.4..3.2. | 478621539956347218312958674627139845193485762845762193269874351531296487784513926 | sudoku_normal_extremely_hard_41 | 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 . . 5 . 9
. . . . 4 . . . .
3 . 2 . . 8 . 7 .
. . . 1 . . 8 . .
. 9 . . . . . 6 .
. . 5 . . 2 . . .
. 6 . 8 . . 3 . 1
. . . . 9 . . . .
7 . 4 . . 3 . 2 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 478621539956347218312958674627139845193485762845762193269874351531296487784513926 #1 Easy (228)
Naked Single: r7c3=9
Naked Single: r1c6=1
Naked Single: r9c4=5
Naked Single: r1c3=8
Naked Single: r3c5=5
Naked Single: r3c4=9
Naked Single: r1c1=4
Naked Single: r2c6=7
Naked Single: r1c8=3
Full ... | Easy |
sudoku_normal_extremely_hard_42 | 5..9....4..1.2.....3...78..7......5...94.32...2......1..41...3.....5.7..3....6..9 | 587931624641528397932647815716892453859413276423765981264179538198354762375286149 | sudoku_normal_extremely_hard_42 | 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 . . . . 4
. . 1 . 2 . . . .
. 3 . . . 7 8 . .
7 . . . . . . 5 .
. . 9 4 . 3 2 . .
. 2 . . . . . . 1
. . 4 1 . . . 3 .
. . . . 5 . 7 . .
3 . . . . 6 . . 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 587931624641528397932647815716892453859413276423765981264179538198354762375286149 #1 Easy (338)
Hidden Single: r5c2=5
Hidden Single: r8c4=3
Hidden Single: r1c5=3
Hidden Single: r9c3=5
Hidden Single: r1c3=7
Hidden Single: r1c8=2
Hidden Single: r9c4=2
Hidden Single: r4c6=2
Hidden Single: r6c4=7... | Easy |
sudoku_normal_extremely_hard_43 | 2....4..6.1.9.......8..5.2.4..6..3...9..8..1...5..3..2.3.1..4.......8.6.6..2....9 | 273814956514926783968375124427651398396482517185793642832169475749538261651247839 | sudoku_normal_extremely_hard_43 | 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 . . 6
. 1 . 9 . . . . .
. . 8 . . 5 . 2 .
4 . . 6 . . 3 . .
. 9 . . 8 . . 1 .
. . 5 . . 3 . . 2
. 3 . 1 . . 4 . .
. . . . . 8 . 6 .
6 . . 2 . . . . 9 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 273814956514926783968375124427651398396482517185793642832169475749538261651247839 #1 Easy (334)
Naked Single: r9c6=7
Naked Single: r5c6=2
Naked Single: r2c6=6
Naked Single: r7c6=9
Full House: r4c6=1
Hidden Single: r1c4=8
Hidden Single: r7c3=2
Naked Single: r4c3=7
Naked Single: r5c1=3
Naked... | Easy |
sudoku_normal_extremely_hard_44 | .4......5..7..6.3.8....4.6..2.1..8..4...3...9..1..9.5..9.2....1.8.4..9..5......7. | 246381795157926438839754162925167843478532619361849257694273581783415926512698374 | sudoku_normal_extremely_hard_44 | 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
. . 7 . . 6 . 3 .
8 . . . . 4 . 6 .
. 2 . 1 . . 8 . .
4 . . . 3 . . . 9
. . 1 . . 9 . 5 .
. 9 . 2 . . . . 1
. 8 . 4 . . 9 . .
5 . . . . . . 7 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 246381795157926438839754162925167843478532619361849257694273581783415926512698374 #1 Hard (744)
Naked Single: r4c8=4
Naked Single: r8c8=2
Naked Single: r7c8=8
Naked Single: r5c8=1
Full House: r1c8=9
Hidden Single: r5c3=8
Hidden Single: r7c7=5
Hidden Single: r6c5=4
Hidden Single: r9c3=2
Hid... | Hard |
sudoku_normal_extremely_hard_45 | .3..6...7..4..2.8....9..1..4...3..9...5...8...1..4...3..6..1....8.5..2..5...8..7. | 231468957954712386867953142428137695375629814619845723746291538183574269592386471 | sudoku_normal_extremely_hard_45 | 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 . . 6 . . . 7
. . 4 . . 2 . 8 .
. . . 9 . . 1 . .
4 . . . 3 . . 9 .
. . 5 . . . 8 . .
. 1 . . 4 . . . 3
. . 6 . . 1 . . .
. 8 . 5 . . 2 . .
5 . . . 8 . . 7 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 231468957954712386867953142428137695375629814619845723746291538183574269592386471 #1 Medium (508)
Hidden Single: r5c1=3
Hidden Single: r7c9=8
Locked Candidates Type 1 (Pointing): 5 in b5 => r13c6<>5
Locked Candidates Type 2 (Claiming): 5 in r1 => r2c79,r3c89<>5
Hidden Single: r4c9=5
Hidden Single: r6c... | Medium |
sudoku_normal_extremely_hard_46 | ..76....28...4.1....6..5.3..9......6...738...1......4..2.5..6....4.2...83....19.. | 437619852859342167216875439793154286642738591185296743921583674564927318378461925 | sudoku_normal_extremely_hard_46 | 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 . . . . 2
8 . . . 4 . 1 . .
. . 6 . . 5 . 3 .
. 9 . . . . . . 6
. . . 7 3 8 . . .
1 . . . . . . 4 .
. 2 . 5 . . 6 . .
. . 4 . 2 . . . 8
3 . . . . 1 9 . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 437619852859342167216875439793154286642738591185296743921583674564927318378461925 #1 Easy (244)
Hidden Single: r2c8=6
Hidden Single: r7c3=1
Naked Single: r7c8=7
Naked Single: r7c1=9
Naked Single: r7c5=8
Naked Single: r9c4=4
Naked Single: r7c6=3
Full House: r7c9=4
Naked Single: r9c9=5
Naked... | Easy |
sudoku_normal_extremely_hard_47 | 4...7...1...8...2...6..97...4...36..6...1...4..72...9...25..8...3...8...8...3...5 | 489372561573861429216459783941783652628915374357246198162594837735128946894637215 | sudoku_normal_extremely_hard_47 | 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 . . . 1
. . . 8 . . . 2 .
. . 6 . . 9 7 . .
. 4 . . . 3 6 . .
6 . . . 1 . . . 4
. . 7 2 . . . 9 .
. . 2 5 . . 8 . .
. 3 . . . 8 . . .
8 . . . 3 . . . 5 | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 489372561573861429216459783941783652628915374357246198162594837735128946894637215 #1 Medium (444)
Locked Pair: 7,9 in r45c4 => r5c6,r89c4<>7, r4c5,r89c4<>9
Naked Single: r5c6=5
Naked Single: r4c5=8
Naked Pair: 3,8 in r36c9 => r27c9<>3
Hidden Single: r7c8=3
Locked Candidates Type 2 (Claiming): 4 in r7 ... | Medium |
sudoku_normal_extremely_hard_48 | .8......7..45.83..9...1..8..7...9...2.......5...3...4..1..5...6..32.61..8......7. | 581932467624578319937614582375849621248167935169325748412753896793286154856491273 | sudoku_normal_extremely_hard_48 | 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
. . 4 5 . 8 3 . .
9 . . . 1 . . 8 .
. 7 . . . 9 . . .
2 . . . . . . . 5
. . . 3 . . . 4 .
. 1 . . 5 . . . 6
. . 3 2 . 6 1 . .
8 . . . . . . 7 . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 581932467624578319937614582375849621248167935169325748412753896793286154856491273 #1 Medium (578)
Hidden Single: r6c6=5
Locked Candidates Type 1 (Pointing): 2 in b5 => r12c5<>2
Hidden Pair: 3,4 in r4c1,r5c2 => r4c1<>1, r4c1<>5, r4c1,r5c2<>6, r5c2<>9
Hidden Single: r4c3=5
Hidden Pair: 3,5 in r1c1,r3c2 => ... | Medium |
sudoku_normal_extremely_hard_49 | ...1..6.34....9.....5.3..2..8.6..5..1...5...8..9..7.4..1..7.2.....8....53.6..4... | 872145693431269857695738421784691532163452978259387146518973264947826315326514789 | sudoku_normal_extremely_hard_49 | 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 . . 6 . 3
4 . . . . 9 . . .
. . 5 . 3 . . 2 .
. 8 . 6 . . 5 . .
1 . . . 5 . . . 8
. . 9 . . 7 . 4 .
. 1 . . 7 . 2 . .
. . . 8 . . . . 5
3 . 6 . . 4 . . . | Complete the sudoku board based on the rules and visual elements. | sudoku | sudoku_benchmark | extremely_hard | 872145693431269857695738421784691532163452978259387146518973264947826315326514789 #1 Easy (234)
Hidden Single: r2c3=1
Naked Single: r2c9=7
Naked Single: r2c7=8
Naked Single: r2c8=5
Naked Single: r1c8=9
Naked Single: r2c4=2
Naked Single: r2c5=6
Full House: r2c2=3
Naked Single: r6c4=3
Naked ... | Easy |
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