PlaySudoku.us
Expert · Puzzle #92
5
6
7
4
7
6
9
4
2
7
3
6
3
2
1
5
8
9
2
4
7
8
5
1
8
"The more you know, the more you know you don't know." — Aristotle
"The more you know, the more you know you don't know." — Aristotle
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.