PlaySudoku.us
Easy · Puzzle #290
9
5
2
8
4
3
3
6
9
8
8
4
2
1
7
9
5
2
6
1
3
6
1
2
9
5
8
9
6
1
9
5
6
2
5
7
6
6
4
8
1
2
3
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.
"Research is to see what everybody else has seen, and to think what nobody else has thought." — Albert Szent-Györgyi
"Research is to see what everybody else has seen, and to think what nobody else has thought." — Albert Szent-Györgyi