task_name
string
rows
int64
cols
int64
rules
string
visual_elements
string
initial_board
string
solution
string
initial_observation
string
solution_reference
string
description
string
title
string
sudoku_normal_hard_0
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
7..6....8...9..5....6.4..3.23...8.....4...6.....7...91.2..3.4....1..9...8....1..5
745613928312987546986542137239168754174395682658724391527836419461259873893471265
7 . . 6 . . . . 8 . . . 9 . . 5 . . . . 6 . 4 . . 3 . 2 3 . . . 8 . . . . . 4 . . . 6 . . . . . 7 . . . 9 1 . 2 . . 3 . 4 . . . . 1 . . 9 . . . 8 . . . . 1 . . 5
7 4 5 6 1 3 9 2 8 3 1 2 9 8 7 5 4 6 9 8 6 5 4 2 1 3 7 2 3 9 1 6 8 7 5 4 1 7 4 3 9 5 6 8 2 6 5 8 7 2 4 3 9 1 5 2 7 8 3 6 4 1 9 4 6 1 2 5 9 8 7 3 8 9 3 4 7 1 2 6 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2212m
sudoku_normal_hard_1
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..3..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
. . 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 . .
2 4 3 8 1 5 9 6 7 6 7 5 3 9 4 8 2 1 8 9 1 7 6 2 4 5 3 9 1 2 6 4 8 7 3 5 7 5 8 1 2 3 6 9 4 3 6 4 9 5 7 2 1 8 4 3 6 2 7 1 5 8 9 1 2 7 5 8 9 3 4 6 5 8 9 4 3 6 1 7 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2311h1
sudoku_normal_hard_2
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
89......55..4........38.2...71..2.....6.7.1.....6..38...7.69........1..91......36
893127645512496873764385291371852964486973152925614387237569418648731529159248736
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
8 9 3 1 2 7 6 4 5 5 1 2 4 9 6 8 7 3 7 6 4 3 8 5 2 9 1 3 7 1 8 5 2 9 6 4 4 8 6 9 7 3 1 5 2 9 2 5 6 1 4 3 8 7 2 3 7 5 6 9 4 1 8 6 4 8 7 3 1 5 2 9 1 5 9 2 4 8 7 3 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2210e
sudoku_normal_hard_3
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.6..8..1.1....2..3..75..9..2....91...3.....7...12....8..4..87..9..3....1.1..4..5.
462983517195472683387516924248739165639851472751264398524198736976325841813647259
. 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 .
4 6 2 9 8 3 5 1 7 1 9 5 4 7 2 6 8 3 3 8 7 5 1 6 9 2 4 2 4 8 7 3 9 1 6 5 6 3 9 8 5 1 4 7 2 7 5 1 2 6 4 3 9 8 5 2 4 1 9 8 7 3 6 9 7 6 3 2 5 8 4 1 8 1 3 6 4 7 2 5 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2403h3
sudoku_normal_hard_4
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...1...2...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
. . . 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 . . .
8 7 6 1 3 5 9 2 4 5 2 3 9 4 6 8 1 7 9 4 1 8 2 7 5 3 6 7 6 9 5 1 3 2 4 8 4 1 5 7 8 2 3 6 9 2 3 8 6 9 4 1 7 5 3 5 4 2 7 8 6 9 1 6 9 7 3 5 1 4 8 2 1 8 2 4 6 9 7 5 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2204m
sudoku_normal_hard_5
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.54....713..5....68...79....9....8....7.8.1....2....3....12...99....5..462....75.
254836971379512486816479523193657842467283195582941637745128369938765214621394758
. 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 .
2 5 4 8 3 6 9 7 1 3 7 9 5 1 2 4 8 6 8 1 6 4 7 9 5 2 3 1 9 3 6 5 7 8 4 2 4 6 7 2 8 3 1 9 5 5 8 2 9 4 1 6 3 7 7 4 5 1 2 8 3 6 9 9 3 8 7 6 5 2 1 4 6 2 1 3 9 4 7 5 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2206e
sudoku_normal_hard_6
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..92.7...6...9..5..3......4..1..82...2..6..4...35..7..3......6..8..3...1...8.95..
149257683678493152532186974461378295725961348893524716354712869987635421216849537
. . 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 . .
1 4 9 2 5 7 6 8 3 6 7 8 4 9 3 1 5 2 5 3 2 1 8 6 9 7 4 4 6 1 3 7 8 2 9 5 7 2 5 9 6 1 3 4 8 8 9 3 5 2 4 7 1 6 3 5 4 7 1 2 8 6 9 9 8 7 6 3 5 4 2 1 2 1 6 8 4 9 5 3 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2009h1
sudoku_normal_hard_7
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..31...52.....9...8...4...6.8...27....1...4....96...8.1...9...8...2.....67...83..
493176852567829134812345976386452791251987463749631285125793648938264517674518329
. . 3 1 . . . 5 2 . . . . . 9 . . . 8 . . . 4 . . . 6 . 8 . . . 2 7 . . . . 1 . . . 4 . . . . 9 6 . . . 8 . 1 . . . 9 . . . 8 . . . 2 . . . . . 6 7 . . . 8 3 . .
4 9 3 1 7 6 8 5 2 5 6 7 8 2 9 1 3 4 8 1 2 3 4 5 9 7 6 3 8 6 4 5 2 7 9 1 2 5 1 9 8 7 4 6 3 7 4 9 6 3 1 2 8 5 1 2 5 7 9 3 6 4 8 9 3 8 2 6 4 5 1 7 6 7 4 5 1 8 3 2 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2403h2
sudoku_normal_hard_8
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..6..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
. . 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 . .
1 2 6 8 7 4 5 3 9 5 7 3 2 1 9 8 4 6 8 9 4 5 3 6 1 7 2 6 1 5 4 2 8 3 9 7 4 3 2 7 9 5 6 1 8 7 8 9 1 6 3 2 5 4 9 5 8 3 4 2 7 6 1 2 4 7 6 5 1 9 8 3 3 6 1 9 8 7 4 2 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2402m
sudoku_normal_hard_9
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.4.1..8.51....7.3...9.3....6..2...7.....8.....7...5..2....7.4...5.9....89.2..6.1.
347129865168457239529638741685291374293784156471365982816572493754913628932846517
. 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 .
3 4 7 1 2 9 8 6 5 1 6 8 4 5 7 2 3 9 5 2 9 6 3 8 7 4 1 6 8 5 2 9 1 3 7 4 2 9 3 7 8 4 1 5 6 4 7 1 3 6 5 9 8 2 8 1 6 5 7 2 4 9 3 7 5 4 9 1 3 6 2 8 9 3 2 8 4 6 5 1 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2012h2
sudoku_normal_hard_10
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.2...8..47..2..8....4.7..1..4.3....5..6...4..5....6.9..7..2.1....5..1..33..6...8.
923168754751234869684975312148392675296857431537416298879523146465781923312649587
. 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 .
9 2 3 1 6 8 7 5 4 7 5 1 2 3 4 8 6 9 6 8 4 9 7 5 3 1 2 1 4 8 3 9 2 6 7 5 2 9 6 8 5 7 4 3 1 5 3 7 4 1 6 2 9 8 8 7 9 5 2 3 1 4 6 4 6 5 7 8 1 9 2 3 3 1 2 6 4 9 5 8 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2311h2
sudoku_normal_hard_11
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
9..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
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
9 2 8 1 5 7 4 3 6 1 3 4 6 9 2 7 8 5 5 7 6 8 3 4 2 9 1 2 8 1 5 7 3 6 4 9 6 4 3 9 8 1 5 2 7 7 9 5 2 4 6 8 1 3 8 6 2 7 1 9 3 5 4 4 5 9 3 6 8 1 7 2 3 1 7 4 2 5 9 6 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2401h2
sudoku_normal_hard_12
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
29...57....14...6.....3...2..4.5..1.1.......7.8..6.5..8...9.....2...36....75...94
296815743351472968478936152934257816165389427782164539843691275529743681617528394
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
2 9 6 8 1 5 7 4 3 3 5 1 4 7 2 9 6 8 4 7 8 9 3 6 1 5 2 9 3 4 2 5 7 8 1 6 1 6 5 3 8 9 4 2 7 7 8 2 1 6 4 5 3 9 8 4 3 6 9 1 2 7 5 5 2 9 7 4 3 6 8 1 6 1 7 5 2 8 3 9 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2208m
sudoku_normal_hard_13
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..6.3.8..4..2...7..5...6..1...1...9...5...4...9...5...7..8...1..6...9..3..3.4.2..
276931854431258976958476321327164598185392467694785132749823615862519743513647289
. . 6 . 3 . 8 . . 4 . . 2 . . . 7 . . 5 . . . 6 . . 1 . . . 1 . . . 9 . . . 5 . . . 4 . . . 9 . . . 5 . . . 7 . . 8 . . . 1 . . 6 . . . 9 . . 3 . . 3 . 4 . 2 . .
2 7 6 9 3 1 8 5 4 4 3 1 2 5 8 9 7 6 9 5 8 4 7 6 3 2 1 3 2 7 1 6 4 5 9 8 1 8 5 3 9 2 4 6 7 6 9 4 7 8 5 1 3 2 7 4 9 8 2 3 6 1 5 8 6 2 5 1 9 7 4 3 5 1 3 6 4 7 2 8 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2401h3
sudoku_normal_hard_14
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
9....6..4..8....2..3..1.5..2..5...9...4.9.8...1...7..5..2.8..6..7....2..1..4....3
921856374548739126637214589263548791754691832819327645392185467475963218186472953
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
9 2 1 8 5 6 3 7 4 5 4 8 7 3 9 1 2 6 6 3 7 2 1 4 5 8 9 2 6 3 5 4 8 7 9 1 7 5 4 6 9 1 8 3 2 8 1 9 3 2 7 6 4 5 3 9 2 1 8 5 4 6 7 4 7 5 9 6 3 2 1 8 1 8 6 4 7 2 9 5 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2009h2
sudoku_normal_hard_15
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.8...5..43..2..1....2.7..9..1....3..7..5.4..2..6....8..2..5.8....4..3..79..1...5.
187935624395246178462871593219768345738514962546329781621457839854693217973182456
. 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 .
1 8 7 9 3 5 6 2 4 3 9 5 2 4 6 1 7 8 4 6 2 8 7 1 5 9 3 2 1 9 7 6 8 3 4 5 7 3 8 5 1 4 9 6 2 5 4 6 3 2 9 7 8 1 6 2 1 4 5 7 8 3 9 8 5 4 6 9 3 2 1 7 9 7 3 1 8 2 4 5 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2110h2
sudoku_normal_hard_16
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..47..3..1....8..2..9.4..5..6...7...5...9...1...8...3..8..1.2..3..5....9..7..26..
854721396136958742729643158968137524573294861241865937685419273312576489497382615
. . 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 . .
8 5 4 7 2 1 3 9 6 1 3 6 9 5 8 7 4 2 7 2 9 6 4 3 1 5 8 9 6 8 1 3 7 5 2 4 5 7 3 2 9 4 8 6 1 2 4 1 8 6 5 9 3 7 6 8 5 4 1 9 2 7 3 3 1 2 5 7 6 4 8 9 4 9 7 3 8 2 6 1 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2109h2
sudoku_normal_hard_17
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
4....5.9...7..1..2.3..2.6....5..9..1.........2..4..8....1.7..4.6..9..3...8.6....5
428765193567391482139824657845239761973186524216457839391578246654912378782643915
4 . . . . 5 . 9 . . . 7 . . 1 . . 2 . 3 . . 2 . 6 . . . . 5 . . 9 . . 1 . . . . . . . . . 2 . . 4 . . 8 . . . . 1 . 7 . . 4 . 6 . . 9 . . 3 . . . 8 . 6 . . . . 5
4 2 8 7 6 5 1 9 3 5 6 7 3 9 1 4 8 2 1 3 9 8 2 4 6 5 7 8 4 5 2 3 9 7 6 1 9 7 3 1 8 6 5 2 4 2 1 6 4 5 7 8 3 9 3 9 1 5 7 8 2 4 6 6 5 4 9 1 2 3 7 8 7 8 2 6 4 3 9 1 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2209m
sudoku_normal_hard_18
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..49..8.......7.2.3...1..5..5...6..1..8...6..6..1...7..4..8...3.2.5.......7..94..
274953816581467329369218754452876931718395642693142578945781263826534197137629485
. . 4 9 . . 8 . . . . . . . 7 . 2 . 3 . . . 1 . . 5 . . 5 . . . 6 . . 1 . . 8 . . . 6 . . 6 . . 1 . . . 7 . . 4 . . 8 . . . 3 . 2 . 5 . . . . . . . 7 . . 9 4 . .
2 7 4 9 5 3 8 1 6 5 8 1 4 6 7 3 2 9 3 6 9 2 1 8 7 5 4 4 5 2 8 7 6 9 3 1 7 1 8 3 9 5 6 4 2 6 9 3 1 4 2 5 7 8 9 4 5 7 8 1 2 6 3 8 2 6 5 3 4 1 9 7 1 3 7 6 2 9 4 8 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2211h3
sudoku_normal_hard_19
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.4.6....71....3.9.9...8.2...3.2.......6.4.7.......9.5...1.7...6.9.8....18....1.4.
248695137167423895953187264739256418516348729482719653321574986694832571875961342
. 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 .
2 4 8 6 9 5 1 3 7 1 6 7 4 2 3 8 9 5 9 5 3 1 8 7 2 6 4 7 3 9 2 5 6 4 1 8 5 1 6 3 4 8 7 2 9 4 8 2 7 1 9 6 5 3 3 2 1 5 7 4 9 8 6 6 9 4 8 3 2 5 7 1 8 7 5 9 6 1 3 4 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2403m
sudoku_normal_hard_20
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.9.1...2.2.7.4...8.....5.6...8.....3.6.....5.9.....8...2.6.....4...8.7.1.5...9.4.
695138427217946538384725169548261973163897254972453816729614385436582791851379642
. 9 . 1 . . . 2 . 2 . 7 . 4 . . . 8 . . . . . 5 . 6 . . . 8 . . . . . 3 . 6 . . . . . 5 . 9 . . . . . 8 . . . 2 . 6 . . . . . 4 . . . 8 . 7 . 1 . 5 . . . 9 . 4 .
6 9 5 1 3 8 4 2 7 2 1 7 9 4 6 5 3 8 3 8 4 7 2 5 1 6 9 5 4 8 2 6 1 9 7 3 1 6 3 8 9 7 2 5 4 9 7 2 4 5 3 8 1 6 7 2 9 6 1 4 3 8 5 4 3 6 5 8 2 7 9 1 8 5 1 3 7 9 6 4 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2205m
sudoku_normal_hard_21
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
2..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
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
2 3 4 5 9 1 8 6 7 6 7 1 2 3 8 4 5 9 5 8 9 7 6 4 1 2 3 4 2 6 8 5 9 3 7 1 9 5 8 3 1 7 6 4 2 3 1 7 6 4 2 5 9 8 1 6 5 9 2 3 7 8 4 8 9 3 4 7 6 2 1 5 7 4 2 1 8 5 9 3 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2207e
sudoku_normal_hard_22
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..3.5..7..1.8..3..9....7.6...2..6..4....4....1..2..5...9.1....8..7..8.3..8..9.7..
643952871715864392928317465532786914879541623164239587396175248457628139281493756
. . 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 . .
6 4 3 9 5 2 8 7 1 7 1 5 8 6 4 3 9 2 9 2 8 3 1 7 4 6 5 5 3 2 7 8 6 9 1 4 8 7 9 5 4 1 6 2 3 1 6 4 2 3 9 5 8 7 3 9 6 1 7 5 2 4 8 4 5 7 6 2 8 1 3 9 2 8 1 4 9 3 7 5 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2208h1
sudoku_normal_hard_23
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.5..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
. 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 .
2 5 7 4 9 6 8 3 1 8 6 3 5 1 7 4 2 9 4 1 9 8 3 2 5 6 7 7 3 8 1 6 9 2 5 4 6 4 1 2 5 3 9 7 8 5 9 2 7 8 4 6 1 3 3 8 6 9 7 5 1 4 2 9 7 4 6 2 1 3 8 5 1 2 5 3 4 8 7 9 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2301m
sudoku_normal_hard_24
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..8.4..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
. . 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 . .
3 2 8 6 4 1 9 7 5 6 5 4 9 3 7 2 1 8 7 9 1 5 8 2 4 6 3 9 6 3 7 2 5 8 4 1 8 1 2 4 6 3 7 5 9 5 4 7 8 1 9 3 2 6 2 8 9 1 5 4 6 3 7 4 7 5 3 9 6 1 8 2 1 3 6 2 7 8 5 9 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2309h2
sudoku_normal_hard_25
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..8.3..6..1...9..76..7......8...41..5.......6..62...3......1..93..9...2..4..7.5..
478532961215469387639718254783654192524193876196287435857321649361945728942876513
. . 8 . 3 . . 6 . . 1 . . . 9 . . 7 6 . . 7 . . . . . . 8 . . . 4 1 . . 5 . . . . . . . 6 . . 6 2 . . . 3 . . . . . . 1 . . 9 3 . . 9 . . . 2 . . 4 . . 7 . 5 . .
4 7 8 5 3 2 9 6 1 2 1 5 4 6 9 3 8 7 6 3 9 7 1 8 2 5 4 7 8 3 6 5 4 1 9 2 5 2 4 1 9 3 8 7 6 1 9 6 2 8 7 4 3 5 8 5 7 3 2 1 6 4 9 3 6 1 9 4 5 7 2 8 9 4 2 8 7 6 5 1 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2402h1
sudoku_normal_hard_26
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.3..4..6...4..5...9.....2...4.1....3..5.8.7..2....6.8...9.....6...7..5...1..2..9.
832947165674215938951863247748192653165384729293576481329451876486739512517628394
. 3 . . 4 . . 6 . . . 4 . . 5 . . . 9 . . . . . 2 . . . 4 . 1 . . . . 3 . . 5 . 8 . 7 . . 2 . . . . 6 . 8 . . . 9 . . . . . 6 . . . 7 . . 5 . . . 1 . . 2 . . 9 .
8 3 2 9 4 7 1 6 5 6 7 4 2 1 5 9 3 8 9 5 1 8 6 3 2 4 7 7 4 8 1 9 2 6 5 3 1 6 5 3 8 4 7 2 9 2 9 3 5 7 6 4 8 1 3 2 9 4 5 1 8 7 6 4 8 6 7 3 9 5 1 2 5 1 7 6 2 8 3 9 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1907h1
sudoku_normal_hard_27
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.2.89....3....7.8...4...1..6..3...4...3.4.6...5...2..9..9...5...6.4....7....81.2.
125894763396517284784236195672359841913748652458162379249673518861425937537981426
. 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 .
1 2 5 8 9 4 7 6 3 3 9 6 5 1 7 2 8 4 7 8 4 2 3 6 1 9 5 6 7 2 3 5 9 8 4 1 9 1 3 7 4 8 6 5 2 4 5 8 1 6 2 3 7 9 2 4 9 6 7 3 5 1 8 8 6 1 4 2 5 9 3 7 5 3 7 9 8 1 4 2 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1902h-2
sudoku_normal_hard_28
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
67...9..5..14.......3.7.8...4.7....8.16.2.95.5....1.6...8.5.1.......86..2..9...84
674189325851432796923576841349765218716824953582391467498657132135248679267913584
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
6 7 4 1 8 9 3 2 5 8 5 1 4 3 2 7 9 6 9 2 3 5 7 6 8 4 1 3 4 9 7 6 5 2 1 8 7 1 6 8 2 4 9 5 3 5 8 2 3 9 1 4 6 7 4 9 8 6 5 7 1 3 2 1 3 5 2 4 8 6 7 9 2 6 7 9 1 3 5 8 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2304e
sudoku_normal_hard_29
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.1...6...3..5..9....5.8..2..6.9....3..7.2.1..4....7.8..2..7.6....9..3..1...4...5.
214796538386542917795381426862915743937824165451637289523178694649253871178469352
. 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 .
2 1 4 7 9 6 5 3 8 3 8 6 5 4 2 9 1 7 7 9 5 3 8 1 4 2 6 8 6 2 9 1 5 7 4 3 9 3 7 8 2 4 1 6 5 4 5 1 6 3 7 2 8 9 5 2 3 1 7 8 6 9 4 6 4 9 2 5 3 8 7 1 1 7 8 4 6 9 3 5 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2306m
sudoku_normal_hard_30
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..7.8...3.2...1.9....4..5..8...1..6...9...2...4..5...8..6..2....1.7...3.5...6.4..
457689123328571694961423587835214769179836245642957318786342951214795836593168472
. . 7 . 8 . . . 3 . 2 . . . 1 . 9 . . . . 4 . . 5 . . 8 . . . 1 . . 6 . . . 9 . . . 2 . . . 4 . . 5 . . . 8 . . 6 . . 2 . . . . 1 . 7 . . . 3 . 5 . . . 6 . 4 . .
4 5 7 6 8 9 1 2 3 3 2 8 5 7 1 6 9 4 9 6 1 4 2 3 5 8 7 8 3 5 2 1 4 7 6 9 1 7 9 8 3 6 2 4 5 6 4 2 9 5 7 3 1 8 7 8 6 3 4 2 9 5 1 2 1 4 7 9 5 8 3 6 5 9 3 1 6 8 4 7 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2310m
sudoku_normal_hard_31
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
81......6...8.52.......34..23...45......8......17...69..52.......71.8...4......78
813429756674815293952673481238964517796581342541732869185297634367148925429356178
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
8 1 3 4 2 9 7 5 6 6 7 4 8 1 5 2 9 3 9 5 2 6 7 3 4 8 1 2 3 8 9 6 4 5 1 7 7 9 6 5 8 1 3 4 2 5 4 1 7 3 2 8 6 9 1 8 5 2 9 7 6 3 4 3 6 7 1 4 8 9 2 5 4 2 9 3 5 6 1 7 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2202m
sudoku_normal_hard_32
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
6..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
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
6 7 8 5 2 1 3 4 9 2 3 1 7 4 9 5 6 8 9 5 4 3 8 6 7 2 1 4 8 7 9 6 5 1 3 2 5 9 3 2 1 4 8 7 6 1 2 6 8 3 7 9 5 4 3 4 9 1 7 2 6 8 5 8 6 5 4 9 3 2 1 7 7 1 2 6 5 8 4 9 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2107m
sudoku_normal_hard_33
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
8..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
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
8 5 2 3 4 9 6 7 1 4 9 7 5 6 1 3 2 8 1 6 3 8 7 2 5 4 9 9 7 8 4 3 5 2 1 6 6 4 5 1 2 7 9 8 3 3 2 1 9 8 6 7 5 4 5 3 9 7 1 8 4 6 2 7 8 6 2 9 4 1 3 5 2 1 4 6 5 3 8 9 7
Complete the sudoku board based on the rules and visual elements.
Nikoli 170714_sd_easy
sudoku_normal_hard_34
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
91...35....8.6..2....4...8..4...56..3...1...7..72...9..9...8....5..4.8....27...61
916823574478561923523497186249375618385916247167284395694138752751642839832759461
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
9 1 6 8 2 3 5 7 4 4 7 8 5 6 1 9 2 3 5 2 3 4 9 7 1 8 6 2 4 9 3 7 5 6 1 8 3 8 5 9 1 6 2 4 7 1 6 7 2 8 4 3 9 5 6 9 4 1 3 8 7 5 2 7 5 1 6 4 2 8 3 9 8 3 2 7 5 9 4 6 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2111m
sudoku_normal_hard_35
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..4.6..5...3..7..28..9.....4..8..1...9..1..2...8..3..6.....5..12..1..9...6..7.5..
174362859953487612826951743432896175697514328518723496789645231245138967361279584
. . 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 . .
1 7 4 3 6 2 8 5 9 9 5 3 4 8 7 6 1 2 8 2 6 9 5 1 7 4 3 4 3 2 8 9 6 1 7 5 6 9 7 5 1 4 3 2 8 5 1 8 7 2 3 4 9 6 7 8 9 6 4 5 2 3 1 2 4 5 1 3 8 9 6 7 3 6 1 2 7 9 5 8 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2309h1
sudoku_normal_hard_36
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...2..6....4..6.8..5..8...33..1.2.5...9...7...2.9.4..17...2..4..9.3..1....8..5...
871243695934516287652789413386172954149658732527934861763821549495367128218495376
. . . 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 . . .
8 7 1 2 4 3 6 9 5 9 3 4 5 1 6 2 8 7 6 5 2 7 8 9 4 1 3 3 8 6 1 7 2 9 5 4 1 4 9 6 5 8 7 3 2 5 2 7 9 3 4 8 6 1 7 6 3 8 2 1 5 4 9 4 9 5 3 6 7 1 2 8 2 1 8 4 9 5 3 7 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1907h2
sudoku_normal_hard_37
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..1.....9.4.2...6.8...3.4..182..4....6..7..9....5..381..4.1...6.9...3.7.5.....8..
621487539943251768857936412182394657365178294479562381734815926298643175516729843
. . 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 . .
6 2 1 4 8 7 5 3 9 9 4 3 2 5 1 7 6 8 8 5 7 9 3 6 4 1 2 1 8 2 3 9 4 6 5 7 3 6 5 1 7 8 2 9 4 4 7 9 5 6 2 3 8 1 7 3 4 8 1 5 9 2 6 2 9 8 6 4 3 1 7 5 5 1 6 7 2 9 8 4 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1912e
sudoku_normal_hard_38
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
....1.8...6.7....4..3..5..19..2...3...7.8.9...4...3..65..4..7..8....2.9...1.6....
752314869169728354483695271918246537637581942245973186526439718874152693391867425
. . . . 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 . . . .
7 5 2 3 1 4 8 6 9 1 6 9 7 2 8 3 5 4 4 8 3 6 9 5 2 7 1 9 1 8 2 4 6 5 3 7 6 3 7 5 8 1 9 4 2 2 4 5 9 7 3 1 8 6 5 2 6 4 3 9 7 1 8 8 7 4 1 5 2 6 9 3 3 9 1 8 6 7 4 2 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2110m
sudoku_normal_hard_39
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..3.9.6..5..1......7...5..88.........12.3.76.........91..5...3......8..2..6.4.9..
283497651569183274471625398847956123912834765635712849128579436794368512356241987
. . 3 . 9 . 6 . . 5 . . 1 . . . . . . 7 . . . 5 . . 8 8 . . . . . . . . . 1 2 . 3 . 7 6 . . . . . . . . . 9 1 . . 5 . . . 3 . . . . . . 8 . . 2 . . 6 . 4 . 9 . .
2 8 3 4 9 7 6 5 1 5 6 9 1 8 3 2 7 4 4 7 1 6 2 5 3 9 8 8 4 7 9 5 6 1 2 3 9 1 2 8 3 4 7 6 5 6 3 5 7 1 2 8 4 9 1 2 8 5 7 9 4 3 6 7 9 4 3 6 8 5 1 2 3 5 6 2 4 1 9 8 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2106m
sudoku_normal_hard_40
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.8..2......7..5.1.4.......3..9..1.5.3...4...1.7.5..6..6.......8.1.6..7......9..4.
581923467237465819496718523869271354325846971174539682643157298912684735758392146
. 8 . . 2 . . . . . . 7 . . 5 . 1 . 4 . . . . . . . 3 . . 9 . . 1 . 5 . 3 . . . 4 . . . 1 . 7 . 5 . . 6 . . 6 . . . . . . . 8 . 1 . 6 . . 7 . . . . . . 9 . . 4 .
5 8 1 9 2 3 4 6 7 2 3 7 4 6 5 8 1 9 4 9 6 7 1 8 5 2 3 8 6 9 2 7 1 3 5 4 3 2 5 8 4 6 9 7 1 1 7 4 5 3 9 6 8 2 6 4 3 1 5 7 2 9 8 9 1 2 6 8 4 7 3 5 7 5 8 3 9 2 1 4 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2212h3
sudoku_normal_hard_41
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.7.6..5.9....4....3.2..8.7....1..8...9.....6...5..2....6.8..3.1....9....7.4..3.2.
478621539956347218312958674627139845193485762845762193269874351531296487784513926
. 7 . 6 . . 5 . 9 . . . . 4 . . . . 3 . 2 . . 8 . 7 . . . . 1 . . 8 . . . 9 . . . . . 6 . . . 5 . . 2 . . . . 6 . 8 . . 3 . 1 . . . . 9 . . . . 7 . 4 . . 3 . 2 .
4 7 8 6 2 1 5 3 9 9 5 6 3 4 7 2 1 8 3 1 2 9 5 8 6 7 4 6 2 7 1 3 9 8 4 5 1 9 3 4 8 5 7 6 2 8 4 5 7 6 2 1 9 3 2 6 9 8 7 4 3 5 1 5 3 1 2 9 6 4 8 7 7 8 4 5 1 3 9 2 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2203m
sudoku_normal_hard_42
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
5..9....4..1.2.....3...78..7......5...94.32...2......1..41...3.....5.7..3....6..9
587931624641528397932647815716892453859413276423765981264179538198354762375286149
5 . . 9 . . . . 4 . . 1 . 2 . . . . . 3 . . . 7 8 . . 7 . . . . . . 5 . . . 9 4 . 3 2 . . . 2 . . . . . . 1 . . 4 1 . . . 3 . . . . . 5 . 7 . . 3 . . . . 6 . . 9
5 8 7 9 3 1 6 2 4 6 4 1 5 2 8 3 9 7 9 3 2 6 4 7 8 1 5 7 1 6 8 9 2 4 5 3 8 5 9 4 1 3 2 7 6 4 2 3 7 6 5 9 8 1 2 6 4 1 7 9 5 3 8 1 9 8 3 5 4 7 6 2 3 7 5 2 8 6 1 4 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2311m
sudoku_normal_hard_43
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
2....4..6.1.9.......8..5.2.4..6..3...9..8..1...5..3..2.3.1..4.......8.6.6..2....9
273814956514926783968375124427651398396482517185793642832169475749538261651247839
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
2 7 3 8 1 4 9 5 6 5 1 4 9 2 6 7 8 3 9 6 8 3 7 5 1 2 4 4 2 7 6 5 1 3 9 8 3 9 6 4 8 2 5 1 7 1 8 5 7 9 3 6 4 2 8 3 2 1 6 9 4 7 5 7 4 9 5 3 8 2 6 1 6 5 1 2 4 7 8 3 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2307m
sudoku_normal_hard_44
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.4......5..7..6.3.8....4.6..2.1..8..4...3...9..1..9.5..9.2....1.8.4..9..5......7.
246381795157926438839754162925167843478532619361849257694273581783415926512698374
. 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 .
2 4 6 3 8 1 7 9 5 1 5 7 9 2 6 4 3 8 8 3 9 7 5 4 1 6 2 9 2 5 1 6 7 8 4 3 4 7 8 5 3 2 6 1 9 3 6 1 8 4 9 2 5 7 6 9 4 2 7 3 5 8 1 7 8 3 4 1 5 9 2 6 5 1 2 6 9 8 3 7 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2209h2
sudoku_normal_hard_45
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.3..6...7..4..2.8....9..1..4...3..9...5...8...1..4...3..6..1....8.5..2..5...8..7.
231468957954712386867953142428137695375629814619845723746291538183574269592386471
. 3 . . 6 . . . 7 . . 4 . . 2 . 8 . . . . 9 . . 1 . . 4 . . . 3 . . 9 . . . 5 . . . 8 . . . 1 . . 4 . . . 3 . . 6 . . 1 . . . . 8 . 5 . . 2 . . 5 . . . 8 . . 7 .
2 3 1 4 6 8 9 5 7 9 5 4 7 1 2 3 8 6 8 6 7 9 5 3 1 4 2 4 2 8 1 3 7 6 9 5 3 7 5 6 2 9 8 1 4 6 1 9 8 4 5 7 2 3 7 4 6 2 9 1 5 3 8 1 8 3 5 7 4 2 6 9 5 9 2 3 8 6 4 7 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2104h2
sudoku_normal_hard_46
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..76....28...4.1....6..5.3..9......6...738...1......4..2.5..6....4.2...83....19..
437619852859342167216875439793154286642738591185296743921583674564927318378461925
. . 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 . .
4 3 7 6 1 9 8 5 2 8 5 9 3 4 2 1 6 7 2 1 6 8 7 5 4 3 9 7 9 3 1 5 4 2 8 6 6 4 2 7 3 8 5 9 1 1 8 5 2 9 6 7 4 3 9 2 1 5 8 3 6 7 4 5 6 4 9 2 7 3 1 8 3 7 8 4 6 1 9 2 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2109m
sudoku_normal_hard_47
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
4...7...1...8...2...6..97...4...36..6...1...4..72...9...25..8...3...8...8...3...5
489372561573861429216459783941783652628915374357246198162594837735128946894637215
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
4 8 9 3 7 2 5 6 1 5 7 3 8 6 1 4 2 9 2 1 6 4 5 9 7 8 3 9 4 1 7 8 3 6 5 2 6 2 8 9 1 5 3 7 4 3 5 7 2 4 6 1 9 8 1 6 2 5 9 4 8 3 7 7 3 5 1 2 8 9 4 6 8 9 4 6 3 7 2 1 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2301h3
sudoku_normal_hard_48
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.8......7..45.83..9...1..8..7...9...2.......5...3...4..1..5...6..32.61..8......7.
581932467624578319937614582375849621248167935169325748412753896793286154856491273
. 8 . . . . . . 7 . . 4 5 . 8 3 . . 9 . . . 1 . . 8 . . 7 . . . 9 . . . 2 . . . . . . . 5 . . . 3 . . . 4 . . 1 . . 5 . . . 6 . . 3 2 . 6 1 . . 8 . . . . . . 7 .
5 8 1 9 3 2 4 6 7 6 2 4 5 7 8 3 1 9 9 3 7 6 1 4 5 8 2 3 7 5 8 4 9 6 2 1 2 4 8 1 6 7 9 3 5 1 6 9 3 2 5 7 4 8 4 1 2 7 5 3 8 9 6 7 9 3 2 8 6 1 5 4 8 5 6 4 9 1 2 7 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2002h1
sudoku_normal_hard_49
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...1..6.34....9.....5.3..2..8.6..5..1...5...8..9..7.4..1..7.2.....8....53.6..4...
872145693431269857695738421784691532163452978259387146518973264947826315326514789
. . . 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 . . .
8 7 2 1 4 5 6 9 3 4 3 1 2 6 9 8 5 7 6 9 5 7 3 8 4 2 1 7 8 4 6 9 1 5 3 2 1 6 3 4 5 2 9 7 8 2 5 9 3 8 7 1 4 6 5 1 8 9 7 3 2 6 4 9 4 7 8 2 6 3 1 5 3 2 6 5 1 4 7 8 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1908m
sudoku_normal_hard_50
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
7...1.6...4.5...9...8..9..358....1..9...5...8..1....456..4..3...7...3.2...2.9...7
793218654146537892258649713587924136964351278321786945615472389479863521832195467
7 . . . 1 . 6 . . . 4 . 5 . . . 9 . . . 8 . . 9 . . 3 5 8 . . . . 1 . . 9 . . . 5 . . . 8 . . 1 . . . . 4 5 6 . . 4 . . 3 . . . 7 . . . 3 . 2 . . . 2 . 9 . . . 7
7 9 3 2 1 8 6 5 4 1 4 6 5 3 7 8 9 2 2 5 8 6 4 9 7 1 3 5 8 7 9 2 4 1 3 6 9 6 4 3 5 1 2 7 8 3 2 1 7 8 6 9 4 5 6 1 5 4 7 2 3 8 9 4 7 9 8 6 3 5 2 1 8 3 2 1 9 5 4 6 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2303h1
sudoku_normal_hard_51
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...2..7.3.4..7....9.....5.25..8...3...1.2.9...8...4..63.9.....7....5..1.6.8..3...
165289743842375691973461582596817234431526978287934156359142867724658319618793425
. . . 2 . . 7 . 3 . 4 . . 7 . . . . 9 . . . . . 5 . 2 5 . . 8 . . . 3 . . . 1 . 2 . 9 . . . 8 . . . 4 . . 6 3 . 9 . . . . . 7 . . . . 5 . . 1 . 6 . 8 . . 3 . . .
1 6 5 2 8 9 7 4 3 8 4 2 3 7 5 6 9 1 9 7 3 4 6 1 5 8 2 5 9 6 8 1 7 2 3 4 4 3 1 5 2 6 9 7 8 2 8 7 9 3 4 1 5 6 3 5 9 1 4 2 8 6 7 7 2 4 6 5 8 3 1 9 6 1 8 7 9 3 4 2 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1909h
sudoku_normal_hard_52
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.4...8...5..1..9....7.3..1..9......7..2.4.8..1......6..8..9.4....3..7..2...5...3.
941658723536172984827439615698215347372946851154783269285391476413867592769524138
. 4 . . . 8 . . . 5 . . 1 . . 9 . . . . 7 . 3 . . 1 . . 9 . . . . . . 7 . . 2 . 4 . 8 . . 1 . . . . . . 6 . . 8 . . 9 . 4 . . . . 3 . . 7 . . 2 . . . 5 . . . 3 .
9 4 1 6 5 8 7 2 3 5 3 6 1 7 2 9 8 4 8 2 7 4 3 9 6 1 5 6 9 8 2 1 5 3 4 7 3 7 2 9 4 6 8 5 1 1 5 4 7 8 3 2 6 9 2 8 5 3 9 1 4 7 6 4 1 3 8 6 7 5 9 2 7 6 9 5 2 4 1 3 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2308m
sudoku_normal_hard_53
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
5..1....6.6....9....7..4.2...37....8.8..3..1.9....64...1.2..8....5....7.8....9..4
542193786368572941197684325623741598784935612951826437419257863235468179876319254
5 . . 1 . . . . 6 . 6 . . . . 9 . . . . 7 . . 4 . 2 . . . 3 7 . . . . 8 . 8 . . 3 . . 1 . 9 . . . . 6 4 . . . 1 . 2 . . 8 . . . . 5 . . . . 7 . 8 . . . . 9 . . 4
5 4 2 1 9 3 7 8 6 3 6 8 5 7 2 9 4 1 1 9 7 6 8 4 3 2 5 6 2 3 7 4 1 5 9 8 7 8 4 9 3 5 6 1 2 9 5 1 8 2 6 4 3 7 4 1 9 2 5 7 8 6 3 2 3 5 4 6 8 1 7 9 8 7 6 3 1 9 2 5 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2106h1
sudoku_normal_hard_54
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..5.3.6.....7...4..8...6..13..8...2...7...9...9...1..41..5...8..5...2.....9.4.7..
275134698961785342483296571346859127817423956592671834134567289758912463629348715
. . 5 . 3 . 6 . . . . . 7 . . . 4 . . 8 . . . 6 . . 1 3 . . 8 . . . 2 . . . 7 . . . 9 . . . 9 . . . 1 . . 4 1 . . 5 . . . 8 . . 5 . . . 2 . . . . . 9 . 4 . 7 . .
2 7 5 1 3 4 6 9 8 9 6 1 7 8 5 3 4 2 4 8 3 2 9 6 5 7 1 3 4 6 8 5 9 1 2 7 8 1 7 4 2 3 9 5 6 5 9 2 6 7 1 8 3 4 1 3 4 5 6 7 2 8 9 7 5 8 9 1 2 4 6 3 6 2 9 3 4 8 7 1 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2205h1
sudoku_normal_hard_55
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..6.21..5...5..8..4......3..5...2..7..9.4.1..6..8...9..1......6..2..7...8..25.4..
386421975721539864495678231158392647239746158674815392513984726942167583867253419
. . 6 . 2 1 . . 5 . . . 5 . . 8 . . 4 . . . . . . 3 . . 5 . . . 2 . . 7 . . 9 . 4 . 1 . . 6 . . 8 . . . 9 . . 1 . . . . . . 6 . . 2 . . 7 . . . 8 . . 2 5 . 4 . .
3 8 6 4 2 1 9 7 5 7 2 1 5 3 9 8 6 4 4 9 5 6 7 8 2 3 1 1 5 8 3 9 2 6 4 7 2 3 9 7 4 6 1 5 8 6 7 4 8 1 5 3 9 2 5 1 3 9 8 4 7 2 6 9 4 2 1 6 7 5 8 3 8 6 7 2 5 3 4 1 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2105m
sudoku_normal_hard_56
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...8.4..5.3..9..1......74..9.4...3....7.6.2....5...1.6..24......8..7..9.7..1.3...
271834965436592817598617423964721358817365249325948176652489731183276594749153682
. . . 8 . 4 . . 5 . 3 . . 9 . . 1 . . . . . . 7 4 . . 9 . 4 . . . 3 . . . . 7 . 6 . 2 . . . . 5 . . . 1 . 6 . . 2 4 . . . . . . 8 . . 7 . . 9 . 7 . . 1 . 3 . . .
2 7 1 8 3 4 9 6 5 4 3 6 5 9 2 8 1 7 5 9 8 6 1 7 4 2 3 9 6 4 7 2 1 3 5 8 8 1 7 3 6 5 2 4 9 3 2 5 9 4 8 1 7 6 6 5 2 4 8 9 7 3 1 1 8 3 2 7 6 5 9 4 7 4 9 1 5 3 6 8 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2202e
sudoku_normal_hard_57
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...2......4...9..71.9.4.6...7.6....8..5.7.9..3....1.5...2.1.5.66..4...3......3...
783256149546189327129347685974635218215874963368921754432718596657492831891563472
. . . 2 . . . . . . 4 . . . 9 . . 7 1 . 9 . 4 . 6 . . . 7 . 6 . . . . 8 . . 5 . 7 . 9 . . 3 . . . . 1 . 5 . . . 2 . 1 . 5 . 6 6 . . 4 . . . 3 . . . . . . 3 . . .
7 8 3 2 5 6 1 4 9 5 4 6 1 8 9 3 2 7 1 2 9 3 4 7 6 8 5 9 7 4 6 3 5 2 1 8 2 1 5 8 7 4 9 6 3 3 6 8 9 2 1 7 5 4 4 3 2 7 1 8 5 9 6 6 5 7 4 9 2 8 3 1 8 9 1 5 6 3 4 7 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1905h
sudoku_normal_hard_58
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..4....2..9...2..56...3.7..2..7...9...8.1.6...3...4..8..1.6...43..9...8..7....1..
754896321193472865682135749216758493548319672937624518821567934365941287479283156
. . 4 . . . . 2 . . 9 . . . 2 . . 5 6 . . . 3 . 7 . . 2 . . 7 . . . 9 . . . 8 . 1 . 6 . . . 3 . . . 4 . . 8 . . 1 . 6 . . . 4 3 . . 9 . . . 8 . . 7 . . . . 1 . .
7 5 4 8 9 6 3 2 1 1 9 3 4 7 2 8 6 5 6 8 2 1 3 5 7 4 9 2 1 6 7 5 8 4 9 3 5 4 8 3 1 9 6 7 2 9 3 7 6 2 4 5 1 8 8 2 1 5 6 7 9 3 4 3 6 5 9 4 1 2 8 7 4 7 9 2 8 3 1 5 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2312m
sudoku_normal_hard_59
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..5..8..1.2.1..3..78..3..9...46....9.3.....1.9....72...1..6..85..2..3.7.5..4..6..
345298761629174358781536492174625839236849517958317246413762985862953174597481623
. . 5 . . 8 . . 1 . 2 . 1 . . 3 . . 7 8 . . 3 . . 9 . . . 4 6 . . . . 9 . 3 . . . . . 1 . 9 . . . . 7 2 . . . 1 . . 6 . . 8 5 . . 2 . . 3 . 7 . 5 . . 4 . . 6 . .
3 4 5 2 9 8 7 6 1 6 2 9 1 7 4 3 5 8 7 8 1 5 3 6 4 9 2 1 7 4 6 2 5 8 3 9 2 3 6 8 4 9 5 1 7 9 5 8 3 1 7 2 4 6 4 1 3 7 6 2 9 8 5 8 6 2 9 5 3 1 7 4 5 9 7 4 8 1 6 2 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2310e
sudoku_normal_hard_60
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
9..6....2..8..3....1..7.4....7....3.5..8.1..9.8....1....3.6..7....9..5..8....2..6
975684312428153697316279485147596238532841769689327154293465871764918523851732946
9 . . 6 . . . . 2 . . 8 . . 3 . . . . 1 . . 7 . 4 . . . . 7 . . . . 3 . 5 . . 8 . 1 . . 9 . 8 . . . . 1 . . . . 3 . 6 . . 7 . . . . 9 . . 5 . . 8 . . . . 2 . . 6
9 7 5 6 8 4 3 1 2 4 2 8 1 5 3 6 9 7 3 1 6 2 7 9 4 8 5 1 4 7 5 9 6 2 3 8 5 3 2 8 4 1 7 6 9 6 8 9 3 2 7 1 5 4 2 9 3 4 6 5 8 7 1 7 6 4 9 1 8 5 2 3 8 5 1 7 3 2 9 4 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2304m
sudoku_normal_hard_61
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
....1...29..7..3....1..8.4..5.8..2..7...9...5..2..6.8..4.3..7....6..1..98...6....
387614592964725318521938647659843271738192465412576983145389726276451839893267154
. . . . 1 . . . 2 9 . . 7 . . 3 . . . . 1 . . 8 . 4 . . 5 . 8 . . 2 . . 7 . . . 9 . . . 5 . . 2 . . 6 . 8 . . 4 . 3 . . 7 . . . . 6 . . 1 . . 9 8 . . . 6 . . . .
3 8 7 6 1 4 5 9 2 9 6 4 7 2 5 3 1 8 5 2 1 9 3 8 6 4 7 6 5 9 8 4 3 2 7 1 7 3 8 1 9 2 4 6 5 4 1 2 5 7 6 9 8 3 1 4 5 3 8 9 7 2 6 2 7 6 4 5 1 8 3 9 8 9 3 2 6 7 1 5 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2006h3
sudoku_normal_hard_62
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
8..2...6...3..5..1.4.3..7..9.1....8.....6.....3....2.5..6..4.7.2..1..9...8...9..4
819247563763985421542316798921453687475862319638791245196534872254178936387629154
8 . . 2 . . . 6 . . . 3 . . 5 . . 1 . 4 . 3 . . 7 . . 9 . 1 . . . . 8 . . . . . 6 . . . . . 3 . . . . 2 . 5 . . 6 . . 4 . 7 . 2 . . 1 . . 9 . . . 8 . . . 9 . . 4
8 1 9 2 4 7 5 6 3 7 6 3 9 8 5 4 2 1 5 4 2 3 1 6 7 9 8 9 2 1 4 5 3 6 8 7 4 7 5 8 6 2 3 1 9 6 3 8 7 9 1 2 4 5 1 9 6 5 3 4 8 7 2 2 5 4 1 7 8 9 3 6 3 8 7 6 2 9 1 5 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2305m
sudoku_normal_hard_63
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...7....423...5.7...5.8....4..6..1...8.....2...2..9..6....1.7...5.4...619....3...
869721534231945678745386912493652187586174329172839456624518793358497261917263845
. . . 7 . . . . 4 2 3 . . . 5 . 7 . . . 5 . 8 . . . . 4 . . 6 . . 1 . . . 8 . . . . . 2 . . . 2 . . 9 . . 6 . . . . 1 . 7 . . . 5 . 4 . . . 6 1 9 . . . . 3 . . .
8 6 9 7 2 1 5 3 4 2 3 1 9 4 5 6 7 8 7 4 5 3 8 6 9 1 2 4 9 3 6 5 2 1 8 7 5 8 6 1 7 4 3 2 9 1 7 2 8 3 9 4 5 6 6 2 4 5 1 8 7 9 3 3 5 8 4 9 7 2 6 1 9 1 7 2 6 3 8 4 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2307h3
sudoku_normal_hard_64
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...5....31....46....2....9.6..3.2.4...8...1...9.8.1..5.5....2....79....83....7...
769528413135794682842136597671352849528479136493861725954683271217945368386217954
. . . 5 . . . . 3 1 . . . . 4 6 . . . . 2 . . . . 9 . 6 . . 3 . 2 . 4 . . . 8 . . . 1 . . . 9 . 8 . 1 . . 5 . 5 . . . . 2 . . . . 7 9 . . . . 8 3 . . . . 7 . . .
7 6 9 5 2 8 4 1 3 1 3 5 7 9 4 6 8 2 8 4 2 1 3 6 5 9 7 6 7 1 3 5 2 8 4 9 5 2 8 4 7 9 1 3 6 4 9 3 8 6 1 7 2 5 9 5 4 6 8 3 2 7 1 2 1 7 9 4 5 3 6 8 3 8 6 2 1 7 9 5 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1910h1
sudoku_normal_hard_65
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
6...9..2..5...4.73..1...5.....7...5.2...3...9.4...1.....6...1..47.3...9..8..5...6
634597821852164973791283564318749652267835419549621387926478135475316298183952746
6 . . . 9 . . 2 . . 5 . . . 4 . 7 3 . . 1 . . . 5 . . . . . 7 . . . 5 . 2 . . . 3 . . . 9 . 4 . . . 1 . . . . . 6 . . . 1 . . 4 7 . 3 . . . 9 . . 8 . . 5 . . . 6
6 3 4 5 9 7 8 2 1 8 5 2 1 6 4 9 7 3 7 9 1 2 8 3 5 6 4 3 1 8 7 4 9 6 5 2 2 6 7 8 3 5 4 1 9 5 4 9 6 2 1 3 8 7 9 2 6 4 7 8 1 3 5 4 7 5 3 1 6 2 9 8 1 8 3 9 5 2 7 4 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2203e
sudoku_normal_hard_66
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..4.8...5.1.9..8..2......6..4.1..9..6.......4..5..7.3..2......8..7..2.1.3...6.5..
964783125513926847278514369742138956631259784895647231126375498457892613389461572
. . 4 . 8 . . . 5 . 1 . 9 . . 8 . . 2 . . . . . . 6 . . 4 . 1 . . 9 . . 6 . . . . . . . 4 . . 5 . . 7 . 3 . . 2 . . . . . . 8 . . 7 . . 2 . 1 . 3 . . . 6 . 5 . .
9 6 4 7 8 3 1 2 5 5 1 3 9 2 6 8 4 7 2 7 8 5 1 4 3 6 9 7 4 2 1 3 8 9 5 6 6 3 1 2 5 9 7 8 4 8 9 5 6 4 7 2 3 1 1 2 6 3 7 5 4 9 8 4 5 7 8 9 2 6 1 3 3 8 9 4 6 1 5 7 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1912h2
sudoku_normal_hard_67
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..69...73.5...4..64...628...732.8..5..1.4.2..6..3.518...418...23..5...1.21...63..
826951473157834926439762851973218645581647239642395187794183562368529714215476398
. . 6 9 . . . 7 3 . 5 . . . 4 . . 6 4 . . . 6 2 8 . . . 7 3 2 . 8 . . 5 . . 1 . 4 . 2 . . 6 . . 3 . 5 1 8 . . . 4 1 8 . . . 2 3 . . 5 . . . 1 . 2 1 . . . 6 3 . .
8 2 6 9 5 1 4 7 3 1 5 7 8 3 4 9 2 6 4 3 9 7 6 2 8 5 1 9 7 3 2 1 8 6 4 5 5 8 1 6 4 7 2 3 9 6 4 2 3 9 5 1 8 7 7 9 4 1 8 3 5 6 2 3 6 8 5 2 9 7 1 4 2 1 5 4 7 6 3 9 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk170929sd
sudoku_normal_hard_68
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.2..9.6....4..1..97..2...5.2..8..1......3......3..5..4.5...6..71..3..8....6.8..9.
825493671634571289719268453267849135541732968983615724458926317192357846376184592
. 2 . . 9 . 6 . . . . 4 . . 1 . . 9 7 . . 2 . . . 5 . 2 . . 8 . . 1 . . . . . . 3 . . . . . . 3 . . 5 . . 4 . 5 . . . 6 . . 7 1 . . 3 . . 8 . . . . 6 . 8 . . 9 .
8 2 5 4 9 3 6 7 1 6 3 4 5 7 1 2 8 9 7 1 9 2 6 8 4 5 3 2 6 7 8 4 9 1 3 5 5 4 1 7 3 2 9 6 8 9 8 3 6 1 5 7 2 4 4 5 8 9 2 6 3 1 7 1 9 2 3 5 7 8 4 6 3 7 6 1 8 4 5 9 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2307h2
sudoku_normal_hard_69
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..84...3..5..2..6.3...7..8...7.....4...5.6...1.....9...4..3...7.2..9..1..6...28..
278461539954823761316975482637289154492516378185347926541638297823794615769152843
. . 8 4 . . . 3 . . 5 . . 2 . . 6 . 3 . . . 7 . . 8 . . . 7 . . . . . 4 . . . 5 . 6 . . . 1 . . . . . 9 . . . 4 . . 3 . . . 7 . 2 . . 9 . . 1 . . 6 . . . 2 8 . .
2 7 8 4 6 1 5 3 9 9 5 4 8 2 3 7 6 1 3 1 6 9 7 5 4 8 2 6 3 7 2 8 9 1 5 4 4 9 2 5 1 6 3 7 8 1 8 5 3 4 7 9 2 6 5 4 1 6 3 8 2 9 7 8 2 3 7 9 4 6 1 5 7 6 9 1 5 2 8 4 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2112m
sudoku_normal_hard_70
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..3.9.4...5.8...1.6....2..7..2....3.1...8...6.9....5..4..1....2.7...6.8...9.5.3..
823791465957864213614532897782645139145983726396217548438179652571326984269458371
. . 3 . 9 . 4 . . . 5 . 8 . . . 1 . 6 . . . . 2 . . 7 . . 2 . . . . 3 . 1 . . . 8 . . . 6 . 9 . . . . 5 . . 4 . . 1 . . . . 2 . 7 . . . 6 . 8 . . . 9 . 5 . 3 . .
8 2 3 7 9 1 4 6 5 9 5 7 8 6 4 2 1 3 6 1 4 5 3 2 8 9 7 7 8 2 6 4 5 1 3 9 1 4 5 9 8 3 7 2 6 3 9 6 2 1 7 5 4 8 4 3 8 1 7 9 6 5 2 5 7 1 3 2 6 9 8 4 2 6 9 4 5 8 3 7 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2309m
sudoku_normal_hard_71
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...3.8.9.1.......2..5.1.4..8....7.3...2...7...1.9....4..1.5.8..4.......7.9.6.3...
247368195139745682685219473854127936962534718713986524371452869426891357598673241
. . . 3 . 8 . 9 . 1 . . . . . . . 2 . . 5 . 1 . 4 . . 8 . . . . 7 . 3 . . . 2 . . . 7 . . . 1 . 9 . . . . 4 . . 1 . 5 . 8 . . 4 . . . . . . . 7 . 9 . 6 . 3 . . .
2 4 7 3 6 8 1 9 5 1 3 9 7 4 5 6 8 2 6 8 5 2 1 9 4 7 3 8 5 4 1 2 7 9 3 6 9 6 2 5 3 4 7 1 8 7 1 3 9 8 6 5 2 4 3 7 1 4 5 2 8 6 9 4 2 6 8 9 1 3 5 7 5 9 8 6 7 3 2 4 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2102h1
sudoku_normal_hard_72
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..1.9...59..8..1....2....3.7..9..2...4..2..7...5..1..4.2....3....8..4..76...5.8..
361492785954873162872516439736945218149628573285731694427189356518364927693257841
. . 1 . 9 . . . 5 9 . . 8 . . 1 . . . . 2 . . . . 3 . 7 . . 9 . . 2 . . . 4 . . 2 . . 7 . . . 5 . . 1 . . 4 . 2 . . . . 3 . . . . 8 . . 4 . . 7 6 . . . 5 . 8 . .
3 6 1 4 9 2 7 8 5 9 5 4 8 7 3 1 6 2 8 7 2 5 1 6 4 3 9 7 3 6 9 4 5 2 1 8 1 4 9 6 2 8 5 7 3 2 8 5 7 3 1 6 9 4 4 2 7 1 8 9 3 5 6 5 1 8 3 6 4 9 2 7 6 9 3 2 5 7 8 4 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1908h
sudoku_normal_hard_73
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
6...8.2....54.26.....1...5..9...8...8...4...3...3...7..4...9.....26.35....3.7...9
631985247785432691429167358396758412857241963214396875148529736972613584563874129
6 . . . 8 . 2 . . . . 5 4 . 2 6 . . . . . 1 . . . 5 . . 9 . . . 8 . . . 8 . . . 4 . . . 3 . . . 3 . . . 7 . . 4 . . . 9 . . . . . 2 6 . 3 5 . . . . 3 . 7 . . . 9
6 3 1 9 8 5 2 4 7 7 8 5 4 3 2 6 9 1 4 2 9 1 6 7 3 5 8 3 9 6 7 5 8 4 1 2 8 5 7 2 4 1 9 6 3 2 1 4 3 9 6 8 7 5 1 4 8 5 2 9 7 3 6 9 7 2 6 1 3 5 8 4 5 6 3 8 7 4 1 2 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2201h2
sudoku_normal_hard_74
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
9..8...3......1..4..5.6.7...8......9..7.1.8..4......6...8.3.1..6..9......2...4..8
914827536762351984835469712186542379297613845453798261548236197671985423329174658
9 . . 8 . . . 3 . . . . . . 1 . . 4 . . 5 . 6 . 7 . . . 8 . . . . . . 9 . . 7 . 1 . 8 . . 4 . . . . . . 6 . . . 8 . 3 . 1 . . 6 . . 9 . . . . . . 2 . . . 4 . . 8
9 1 4 8 2 7 5 3 6 7 6 2 3 5 1 9 8 4 8 3 5 4 6 9 7 1 2 1 8 6 5 4 2 3 7 9 2 9 7 6 1 3 8 4 5 4 5 3 7 9 8 2 6 1 5 4 8 2 3 6 1 9 7 6 7 1 9 8 5 4 2 3 3 2 9 1 7 4 6 5 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2108m
sudoku_normal_hard_75
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.5...2..84..1..9....7....3..2...8..1..3.4.8..5..6...7..1....5....5..3..66..7...9.
156932748432187965897456132924378651763541829581629374319264587275893416648715293
. 5 . . . 2 . . 8 4 . . 1 . . 9 . . . . 7 . . . . 3 . . 2 . . . 8 . . 1 . . 3 . 4 . 8 . . 5 . . 6 . . . 7 . . 1 . . . . 5 . . . . 5 . . 3 . . 6 6 . . 7 . . . 9 .
1 5 6 9 3 2 7 4 8 4 3 2 1 8 7 9 6 5 8 9 7 4 5 6 1 3 2 9 2 4 3 7 8 6 5 1 7 6 3 5 4 1 8 2 9 5 8 1 6 2 9 3 7 4 3 1 9 2 6 4 5 8 7 2 7 5 8 9 3 4 1 6 6 4 8 7 1 5 2 9 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2305h3
sudoku_normal_hard_76
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
7.9..2......1..7..3.6.8..1..3.4.9..8..7...4..5..6.1.9..9..6.1.4..1..4......5..6.9
719342856258196743346785912132479568967853421584621397895267134671934285423518679
7 . 9 . . 2 . . . . . . 1 . . 7 . . 3 . 6 . 8 . . 1 . . 3 . 4 . 9 . . 8 . . 7 . . . 4 . . 5 . . 6 . 1 . 9 . . 9 . . 6 . 1 . 4 . . 1 . . 4 . . . . . . 5 . . 6 . 9
7 1 9 3 4 2 8 5 6 2 5 8 1 9 6 7 4 3 3 4 6 7 8 5 9 1 2 1 3 2 4 7 9 5 6 8 9 6 7 8 5 3 4 2 1 5 8 4 6 2 1 3 9 7 8 9 5 2 6 7 1 3 4 6 7 1 9 3 4 2 8 5 4 2 3 5 1 8 6 7 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2204e
sudoku_normal_hard_77
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..3..4.5.2..6....8.9..5.6..7.4....6....9.2....1....5.3..1.7..8.4....1..2.7.4..9..
863294157245617398197358624784135269536942871912786543321579486459861732678423915
. . 3 . . 4 . 5 . 2 . . 6 . . . . 8 . 9 . . 5 . 6 . . 7 . 4 . . . . 6 . . . . 9 . 2 . . . . 1 . . . . 5 . 3 . . 1 . 7 . . 8 . 4 . . . . 1 . . 2 . 7 . 4 . . 9 . .
8 6 3 2 9 4 1 5 7 2 4 5 6 1 7 3 9 8 1 9 7 3 5 8 6 2 4 7 8 4 1 3 5 2 6 9 5 3 6 9 4 2 8 7 1 9 1 2 7 8 6 5 4 3 3 2 1 5 7 9 4 8 6 4 5 9 8 6 1 7 3 2 6 7 8 4 2 3 9 1 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2206m
sudoku_normal_hard_78
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.7.4....3..3.8.2..5....1.6..9.2.......4...8.......9.5..6.9....4..2.1.7..4....6.1.
679452183143687295528391467896275341254163879317849652761938524982514736435726918
. 7 . 4 . . . . 3 . . 3 . 8 . 2 . . 5 . . . . 1 . 6 . . 9 . 2 . . . . . . . 4 . . . 8 . . . . . . . 9 . 5 . . 6 . 9 . . . . 4 . . 2 . 1 . 7 . . 4 . . . . 6 . 1 .
6 7 9 4 5 2 1 8 3 1 4 3 6 8 7 2 9 5 5 2 8 3 9 1 4 6 7 8 9 6 2 7 5 3 4 1 2 5 4 1 6 3 8 7 9 3 1 7 8 4 9 6 5 2 7 6 1 9 3 8 5 2 4 9 8 2 5 1 4 7 3 6 4 3 5 7 2 6 9 1 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1903h
sudoku_normal_hard_79
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
42......6..93....5....12.9...3....1...8.2.7...5....3...9.63....2....96..1......48
421795836879364125365812497743986512918523764652471389594638271287149653136257948
4 2 . . . . . . 6 . . 9 3 . . . . 5 . . . . 1 2 . 9 . . . 3 . . . . 1 . . . 8 . 2 . 7 . . . 5 . . . . 3 . . . 9 . 6 3 . . . . 2 . . . . 9 6 . . 1 . . . . . . 4 8
4 2 1 7 9 5 8 3 6 8 7 9 3 6 4 1 2 5 3 6 5 8 1 2 4 9 7 7 4 3 9 8 6 5 1 2 9 1 8 5 2 3 7 6 4 6 5 2 4 7 1 3 8 9 5 9 4 6 3 8 2 7 1 2 8 7 1 4 9 6 5 3 1 3 6 2 5 7 9 4 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2302m
sudoku_normal_hard_80
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.1..6..7...5..28..2..1.....5..6..3...8..7..9...3..5..4.....4..9..78..2...9..3..1.
914368572765492831238157946579641328486273195123985764351724689647819253892536417
. 1 . . 6 . . 7 . . . 5 . . 2 8 . . 2 . . 1 . . . . . 5 . . 6 . . 3 . . . 8 . . 7 . . 9 . . . 3 . . 5 . . 4 . . . . . 4 . . 9 . . 7 8 . . 2 . . . 9 . . 3 . . 1 .
9 1 4 3 6 8 5 7 2 7 6 5 4 9 2 8 3 1 2 3 8 1 5 7 9 4 6 5 7 9 6 4 1 3 2 8 4 8 6 2 7 3 1 9 5 1 2 3 9 8 5 7 6 4 3 5 1 7 2 4 6 8 9 6 4 7 8 1 9 2 5 3 8 9 2 5 3 6 4 1 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2302h3
sudoku_normal_hard_81
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.5..7...19..8..3...6...4....8....6..5..3.1..2..4....5....4...2...1..9..73...6..8.
458973261912856374763214598289745613576391842134628759895437126621589437347162985
. 5 . . 7 . . . 1 9 . . 8 . . 3 . . . 6 . . . 4 . . . . 8 . . . . 6 . . 5 . . 3 . 1 . . 2 . . 4 . . . . 5 . . . . 4 . . . 2 . . . 1 . . 9 . . 7 3 . . . 6 . . 8 .
4 5 8 9 7 3 2 6 1 9 1 2 8 5 6 3 7 4 7 6 3 2 1 4 5 9 8 2 8 9 7 4 5 6 1 3 5 7 6 3 9 1 8 4 2 1 3 4 6 2 8 7 5 9 8 9 5 4 3 7 1 2 6 6 2 1 5 8 9 4 3 7 3 4 7 1 6 2 9 8 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2210m
sudoku_normal_hard_82
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
6....2.....1.5..83.5.7.....9....67...8..1..3...49....5.....4.1.34..8.2.....2....6
698132574721459683453768192935846721286517439174923865562374918349681257817295346
6 . . . . 2 . . . . . 1 . 5 . . 8 3 . 5 . 7 . . . . . 9 . . . . 6 7 . . . 8 . . 1 . . 3 . . . 4 9 . . . . 5 . . . . . 4 . 1 . 3 4 . . 8 . 2 . . . . . 2 . . . . 6
6 9 8 1 3 2 5 7 4 7 2 1 4 5 9 6 8 3 4 5 3 7 6 8 1 9 2 9 3 5 8 4 6 7 2 1 2 8 6 5 1 7 4 3 9 1 7 4 9 2 3 8 6 5 5 6 2 3 7 4 9 1 8 3 4 9 6 8 1 2 5 7 8 1 7 2 9 5 3 4 6
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2206h1
sudoku_normal_hard_83
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
2..3...6...9.1...2.17..89..8..4..7...3.....2...2..6..4..42..13.5...7.4...6...9..8
248397561359614872617528943896432715435781629172956384984265137521873496763149258
2 . . 3 . . . 6 . . . 9 . 1 . . . 2 . 1 7 . . 8 9 . . 8 . . 4 . . 7 . . . 3 . . . . . 2 . . . 2 . . 6 . . 4 . . 4 2 . . 1 3 . 5 . . . 7 . 4 . . . 6 . . . 9 . . 8
2 4 8 3 9 7 5 6 1 3 5 9 6 1 4 8 7 2 6 1 7 5 2 8 9 4 3 8 9 6 4 3 2 7 1 5 4 3 5 7 8 1 6 2 9 1 7 2 9 5 6 3 8 4 9 8 4 2 6 5 1 3 7 5 2 1 8 7 3 4 9 6 7 6 3 1 4 9 2 5 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2208e
sudoku_normal_hard_84
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..9.5.1.......9..28..6...3..7...4..6..5.9.3..2..3...1..4...8..76..2.......8.4.5..
429753168316489752857621439973514286165892374284367915542138697691275843738946521
. . 9 . 5 . 1 . . . . . . . 9 . . 2 8 . . 6 . . . 3 . . 7 . . . 4 . . 6 . . 5 . 9 . 3 . . 2 . . 3 . . . 1 . . 4 . . . 8 . . 7 6 . . 2 . . . . . . . 8 . 4 . 5 . .
4 2 9 7 5 3 1 6 8 3 1 6 4 8 9 7 5 2 8 5 7 6 2 1 4 3 9 9 7 3 5 1 4 2 8 6 1 6 5 8 9 2 3 7 4 2 8 4 3 6 7 9 1 5 5 4 2 1 3 8 6 9 7 6 9 1 2 7 5 8 4 3 7 3 8 9 4 6 5 2 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2107h1
sudoku_normal_hard_85
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
4..7...2...8...3...6..59..7..43...9.5...8...3.3...14..6..19..7...5...6...7...2..1
451738926798216354362459187184367295526984713937521468643195872215873649879642531
4 . . 7 . . . 2 . . . 8 . . . 3 . . . 6 . . 5 9 . . 7 . . 4 3 . . . 9 . 5 . . . 8 . . . 3 . 3 . . . 1 4 . . 6 . . 1 9 . . 7 . . . 5 . . . 6 . . . 7 . . . 2 . . 1
4 5 1 7 3 8 9 2 6 7 9 8 2 1 6 3 5 4 3 6 2 4 5 9 1 8 7 1 8 4 3 6 7 2 9 5 5 2 6 9 8 4 7 1 3 9 3 7 5 2 1 4 6 8 6 4 3 1 9 5 8 7 2 2 1 5 8 7 3 6 4 9 8 7 9 6 4 2 5 3 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1911h2
sudoku_normal_hard_86
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..6..2..1...5..3..9..4...2..3..28.76..8.9.5..16.73..9..2...9..4..5..6...4..8..1..
356982741742561389981473625539128476278694513164735298627319854815246937493857162
. . 6 . . 2 . . 1 . . . 5 . . 3 . . 9 . . 4 . . . 2 . . 3 . . 2 8 . 7 6 . . 8 . 9 . 5 . . 1 6 . 7 3 . . 9 . . 2 . . . 9 . . 4 . . 5 . . 6 . . . 4 . . 8 . . 1 . .
3 5 6 9 8 2 7 4 1 7 4 2 5 6 1 3 8 9 9 8 1 4 7 3 6 2 5 5 3 9 1 2 8 4 7 6 2 7 8 6 9 4 5 1 3 1 6 4 7 3 5 2 9 8 6 2 7 3 1 9 8 5 4 8 1 5 2 4 6 9 3 7 4 9 3 8 5 7 1 6 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2209e
sudoku_normal_hard_87
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.3.2..6..1....5.3...5.7...86..1...2...3...9...9...8..48...5.7...5.6....1..2..4.9.
438291657176485239925376148647139825583742916291568374814953762359627481762814593
. 3 . 2 . . 6 . . 1 . . . . 5 . 3 . . . 5 . 7 . . . 8 6 . . 1 . . . 2 . . . 3 . . . 9 . . . 9 . . . 8 . . 4 8 . . . 5 . 7 . . . 5 . 6 . . . . 1 . . 2 . . 4 . 9 .
4 3 8 2 9 1 6 5 7 1 7 6 4 8 5 2 3 9 9 2 5 3 7 6 1 4 8 6 4 7 1 3 9 8 2 5 5 8 3 7 4 2 9 1 6 2 9 1 5 6 8 3 7 4 8 1 4 9 5 3 7 6 2 3 5 9 6 2 7 4 8 1 7 6 2 8 1 4 5 9 3
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2304h2
sudoku_normal_hard_88
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..9.6.5...1...5.7.5..4....3.8....9.....1.7.....4....6.1....8..5.7.9...8...3.2.4..
329761548418235679567489123781643952652197834934852761146378295275914386893526417
. . 9 . 6 . 5 . . . 1 . . . 5 . 7 . 5 . . 4 . . . . 3 . 8 . . . . 9 . . . . . 1 . 7 . . . . . 4 . . . . 6 . 1 . . . . 8 . . 5 . 7 . 9 . . . 8 . . . 3 . 2 . 4 . .
3 2 9 7 6 1 5 4 8 4 1 8 2 3 5 6 7 9 5 6 7 4 8 9 1 2 3 7 8 1 6 4 3 9 5 2 6 5 2 1 9 7 8 3 4 9 3 4 8 5 2 7 6 1 1 4 6 3 7 8 2 9 5 2 7 5 9 1 4 3 8 6 8 9 3 5 2 6 4 1 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2211m
sudoku_normal_hard_89
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.4.5..1..2.......3..8.3..2.9..1....6.8..5..7.6....4..1.9..8.3..4.......9..2..5.6.
347526198269841753518739624923178546184653972675294831796482315451367289832915467
. 4 . 5 . . 1 . . 2 . . . . . . . 3 . . 8 . 3 . . 2 . 9 . . 1 . . . . 6 . 8 . . 5 . . 7 . 6 . . . . 4 . . 1 . 9 . . 8 . 3 . . 4 . . . . . . . 9 . . 2 . . 5 . 6 .
3 4 7 5 2 6 1 9 8 2 6 9 8 4 1 7 5 3 5 1 8 7 3 9 6 2 4 9 2 3 1 7 8 5 4 6 1 8 4 6 5 3 9 7 2 6 7 5 2 9 4 8 3 1 7 9 6 4 8 2 3 1 5 4 5 1 3 6 7 2 8 9 8 3 2 9 1 5 4 6 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2103h2
sudoku_normal_hard_90
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
...62...9..7..5....1....4..5..4...8.3...8...2.9...1..6..5....9....7..1..2...63...
853624719467915238912378465526497381341586972798231546135842697684759123279163854
. . . 6 2 . . . 9 . . 7 . . 5 . . . . 1 . . . . 4 . . 5 . . 4 . . . 8 . 3 . . . 8 . . . 2 . 9 . . . 1 . . 6 . . 5 . . . . 9 . . . . 7 . . 1 . . 2 . . . 6 3 . . .
8 5 3 6 2 4 7 1 9 4 6 7 9 1 5 2 3 8 9 1 2 3 7 8 4 6 5 5 2 6 4 9 7 3 8 1 3 4 1 5 8 6 9 7 2 7 9 8 2 3 1 5 4 6 1 3 5 8 4 2 6 9 7 6 8 4 7 5 9 1 2 3 2 7 9 1 6 3 8 5 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2303m
sudoku_normal_hard_91
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.5...7..3..7.4.2..1..6...8...61......2.....5......86...7...4..9..3.2.4..8..9...1.
659287143387541296142639587496152738728463951531798624275314869913826475864975312
. 5 . . . 7 . . 3 . . 7 . 4 . 2 . . 1 . . 6 . . . 8 . . . 6 1 . . . . . . 2 . . . . . 5 . . . . . . 8 6 . . . 7 . . . 4 . . 9 . . 3 . 2 . 4 . . 8 . . 9 . . . 1 .
6 5 9 2 8 7 1 4 3 3 8 7 5 4 1 2 9 6 1 4 2 6 3 9 5 8 7 4 9 6 1 5 2 7 3 8 7 2 8 4 6 3 9 5 1 5 3 1 7 9 8 6 2 4 2 7 5 3 1 4 8 6 9 9 1 3 8 2 6 4 7 5 8 6 4 9 7 5 3 1 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2202h2
sudoku_normal_hard_92
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..8.5...4.1...4.7.7..2..1...3...6..2..5...9..6..3...8...4..9..1.9.8...4.2...6.7..
968157324512634879743298156437986512185742963629315487874529631396871245251463798
. . 8 . 5 . . . 4 . 1 . . . 4 . 7 . 7 . . 2 . . 1 . . . 3 . . . 6 . . 2 . . 5 . . . 9 . . 6 . . 3 . . . 8 . . . 4 . . 9 . . 1 . 9 . 8 . . . 4 . 2 . . . 6 . 7 . .
9 6 8 1 5 7 3 2 4 5 1 2 6 3 4 8 7 9 7 4 3 2 9 8 1 5 6 4 3 7 9 8 6 5 1 2 1 8 5 7 4 2 9 6 3 6 2 9 3 1 5 4 8 7 8 7 4 5 2 9 6 3 1 3 9 6 8 7 1 2 4 5 2 5 1 4 6 3 7 9 8
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk1810h
sudoku_normal_hard_93
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.2......55....14....7.4..6..8.9.6...1...5...2...1.2.9..9..3.8....47....36......1.
426897135538261479917345268382976541169453782745182396291634857854719623673528914
. 2 . . . . . . 5 5 . . . . 1 4 . . . . 7 . 4 . . 6 . . 8 . 9 . 6 . . . 1 . . . 5 . . . 2 . . . 1 . 2 . 9 . . 9 . . 3 . 8 . . . . 4 7 . . . . 3 6 . . . . . . 1 .
4 2 6 8 9 7 1 3 5 5 3 8 2 6 1 4 7 9 9 1 7 3 4 5 2 6 8 3 8 2 9 7 6 5 4 1 1 6 9 4 5 3 7 8 2 7 4 5 1 8 2 3 9 6 2 9 1 6 3 4 8 5 7 8 5 4 7 1 9 6 2 3 6 7 3 5 2 8 9 1 4
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2205e
sudoku_normal_hard_94
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..1.8..2...2..1....7...9..4.2.5..1..8...6...9..6..2.4.3..4...6....2..4...9..3.7..
961784325482351697573629814729548136845163279136972548358417962617295483294836751
. . 1 . 8 . . 2 . . . 2 . . 1 . . . . 7 . . . 9 . . 4 . 2 . 5 . . 1 . . 8 . . . 6 . . . 9 . . 6 . . 2 . 4 . 3 . . 4 . . . 6 . . . . 2 . . 4 . . . 9 . . 3 . 7 . .
9 6 1 7 8 4 3 2 5 4 8 2 3 5 1 6 9 7 5 7 3 6 2 9 8 1 4 7 2 9 5 4 8 1 3 6 8 4 5 1 6 3 2 7 9 1 3 6 9 7 2 5 4 8 3 5 8 4 1 7 9 6 2 6 1 7 2 9 5 4 8 3 2 9 4 8 3 6 7 5 1
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2207m
sudoku_normal_hard_95
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
3....8.7.....6.4.9.1.5.....4....91...7.....4...26....3.....1.6.6.8.5.....5.8....2
396428571527163489814597236465389127973215648182674953249731865638952714751846392
3 . . . . 8 . 7 . . . . . 6 . 4 . 9 . 1 . 5 . . . . . 4 . . . . 9 1 . . . 7 . . . . . 4 . . . 2 6 . . . . 3 . . . . . 1 . 6 . 6 . 8 . 5 . . . . . 5 . 8 . . . . 2
3 9 6 4 2 8 5 7 1 5 2 7 1 6 3 4 8 9 8 1 4 5 9 7 2 3 6 4 6 5 3 8 9 1 2 7 9 7 3 2 1 5 6 4 8 1 8 2 6 7 4 9 5 3 2 4 9 7 3 1 8 6 5 6 3 8 9 5 2 7 1 4 7 5 1 8 4 6 3 9 2
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2304h1
sudoku_normal_hard_96
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.2...6..1...7..3..1.9.3..8..4.8....9..3...5..7....5.2..5..2.4.6..1..9...6..5...3.
328956741564781392179432685245863179813297564796145823957328416431679258682514937
. 2 . . . 6 . . 1 . . . 7 . . 3 . . 1 . 9 . 3 . . 8 . . 4 . 8 . . . . 9 . . 3 . . . 5 . . 7 . . . . 5 . 2 . . 5 . . 2 . 4 . 6 . . 1 . . 9 . . . 6 . . 5 . . . 3 .
3 2 8 9 5 6 7 4 1 5 6 4 7 8 1 3 9 2 1 7 9 4 3 2 6 8 5 2 4 5 8 6 3 1 7 9 8 1 3 2 9 7 5 6 4 7 9 6 1 4 5 8 2 3 9 5 7 3 2 8 4 1 6 4 3 1 6 7 9 2 5 8 6 8 2 5 1 4 9 3 7
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2306h2
sudoku_normal_hard_97
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
9..4.2..3..2....9..7..1......6..7.1..3..5..6..1.6..8......7..8..6....4..7..3.4..9
958462173142783596673915248426837915839251764517649832294576381365198427781324659
9 . . 4 . 2 . . 3 . . 2 . . . . 9 . . 7 . . 1 . . . . . . 6 . . 7 . 1 . . 3 . . 5 . . 6 . . 1 . 6 . . 8 . . . . . . 7 . . 8 . . 6 . . . . 4 . . 7 . . 3 . 4 . . 9
9 5 8 4 6 2 1 7 3 1 4 2 7 8 3 5 9 6 6 7 3 9 1 5 2 4 8 4 2 6 8 3 7 9 1 5 8 3 9 2 5 1 7 6 4 5 1 7 6 4 9 8 3 2 2 9 4 5 7 6 3 8 1 3 6 5 1 9 8 4 2 7 7 8 1 3 2 4 6 5 9
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2007h2
sudoku_normal_hard_98
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
..2..48...6.....1.1..9....3..5..6..9.3..1..4.4..8..5..2....3..4.9.....6...82..7..
372154896569328417184967253815746329937512648426839571251673984793485162648291735
. . 2 . . 4 8 . . . 6 . . . . . 1 . 1 . . 9 . . . . 3 . . 5 . . 6 . . 9 . 3 . . 1 . . 4 . 4 . . 8 . . 5 . . 2 . . . . 3 . . 4 . 9 . . . . . 6 . . . 8 2 . . 7 . .
3 7 2 1 5 4 8 9 6 5 6 9 3 2 8 4 1 7 1 8 4 9 6 7 2 5 3 8 1 5 7 4 6 3 2 9 9 3 7 5 1 2 6 4 8 4 2 6 8 3 9 5 7 1 2 5 1 6 7 3 9 8 4 7 9 3 4 8 5 1 6 2 6 4 8 2 9 1 7 3 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2401m
sudoku_normal_hard_99
9
9
Each row, column, and 3×3 subgrid must contain all digits from 1 to 9 exactly once. Digits cannot be repeated within any row, column, or 3×3 subgrid. "
None
.3..7..2...4..6..85..8..9...6..1...3..9...1..1...2..7...5..4..62..1..8...7..9..4.
638971524914256738527843961762519483489367152153428679395784216246135897871692345
. 3 . . 7 . . 2 . . . 4 . . 6 . . 8 5 . . 8 . . 9 . . . 6 . . 1 . . . 3 . . 9 . . . 1 . . 1 . . . 2 . . 7 . . . 5 . . 4 . . 6 2 . . 1 . . 8 . . . 7 . . 9 . . 4 .
6 3 8 9 7 1 5 2 4 9 1 4 2 5 6 7 3 8 5 2 7 8 4 3 9 6 1 7 6 2 5 1 9 4 8 3 4 8 9 3 6 7 1 5 2 1 5 3 4 2 8 6 7 9 3 9 5 7 8 4 2 1 6 2 4 6 1 3 5 8 9 7 8 7 1 6 9 2 3 4 5
Complete the sudoku board based on the rules and visual elements.
Nikoli nhk2101h1