PlaySudoku.us
Hard · Puzzle #418
8
1
5
4
1
6
1
7
9
8
2
4
5
6
4
9
1
6
1
5
2
6
4
3
1
8
2
9
6
8
"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.