PlaySudoku.us
Expert · Puzzle #604
8
6
2
9
4
2
8
9
4
8
2
8
1
3
6
5
1
9
4
3
7
6
9
5
"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.