PlaySudoku.us
Hard · Puzzle #705
6
2
9
1
4
6
8
7
1
4
7
3
2
5
8
9
5
2
4
5
6
5
6
3
7
9
8
5
2
"The measure of intelligence is the ability to change." — Albert Einstein
"The measure of intelligence is the ability to change." — Albert Einstein
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.