How to Play Sudoku
1
Fill empty cells
Place numbers 1-9 in empty cells of the 9×9 grid. Click a cell and select a number.
5
3
7
6
1
9
5
9
8
6
8
6
3
4
8
3
1
7
2
6
6
2
8
4
1
9
5
8
7
9
2
Row rule
Each row must contain all numbers from 1 to 9 exactly once.
3
Column rule
Each column must contain all numbers from 1 to 9 exactly once.
4
3×3 box rule
Each 3×3 box must contain all numbers from 1 to 9 exactly once. Fill all cells correctly to win!
5
3
4
6
7
8
9
1
2
6
1
9
5
9
8
6
8
6
3
4
8
3
1
7
2
6
6
2
8
4
1
9
5
8
7
9