PlaySudoku.us
Hard · Puzzle #113
5
2
7
2
3
5
8
9
6
8
4
2
3
6
4
5
5
7
2
5
2
7
4
1
5
8
7
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