PlaySudoku.us
Hard · Puzzle #788
7
6
5
1
4
3
6
5
8
9
1
4
8
5
6
4
2
2
7
2
1
6
8
5
7
6
The minimum number of clues needed to create a valid Sudoku with a unique solution is 17.
The minimum number of clues needed to create a valid Sudoku with a unique solution is 17.
"It is not enough to be a good player; you must also play well." — Siegbert Tarrasch
"It is not enough to be a good player; you must also play well." — Siegbert Tarrasch