PlaySudoku.us
Easy · Puzzle #556
5
3
7
6
4
1
2
8
4
9
7
5
6
1
6
9
8
5
1
2
3
6
5
5
1
2
3
8
5
1
8
5
3
4
1
7
9
6
9
7
3
4
8
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but for larger grids, it becomes exponentially harder.
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but for larger grids, it becomes exponentially harder.
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but for larger grids, it becomes exponentially harder.
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but for larger grids, it becomes exponentially harder.