PlaySudoku.us
Hard · Puzzle #861
5
9
6
7
8
2
3
8
1
5
2
6
3
2
7
4
3
9
8
1
9
3
7
8
9
5
6
2
5
"It is not the size of a man but the size of his heart that matters." — Evander Holyfield
"It is not the size of a man but the size of his heart that matters." — Evander Holyfield
The minimum number of clues (17) needed for a unique Sudoku was proved by exhaustive computer search in 2012.
The minimum number of clues (17) needed for a unique Sudoku was proved by exhaustive computer search in 2012.