PlaySudoku.us
Expert · Puzzle #628
8
9
2
5
7
1
3
8
9
2
9
5
6
4
3
1
1
2
4
2
5
9
6
7
Counting the number of Sudoku solutions for a given puzzle is #P-complete — computationally harder than NP-complete.
Counting the number of Sudoku solutions for a given puzzle is #P-complete — computationally harder than NP-complete.
Japan has a national Sudoku puzzle competition with separate categories for speed and accuracy.
Japan has a national Sudoku puzzle competition with separate categories for speed and accuracy.