PlaySudoku.us
Easy · Puzzle #27
7
4
2
1
3
5
3
4
9
3
6
7
9
2
1
5
1
2
6
9
7
7
2
5
1
4
8
9
6
6
3
1
2
9
8
1
8
2
4
9
8
6
2
"Young man, in mathematics you don't understand things. You just get used to them." — John von Neumann
"Young man, in mathematics you don't understand things. You just get used to them." — John von Neumann
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.