PlaySudoku.us
Medium · Puzzle #260
8
7
1
3
5
6
4
6
9
2
6
4
8
8
3
5
4
7
1
2
3
8
3
2
9
7
5
5
2
3
1
1
7
"It is not enough to have a good mind; the main thing is to use it well." — René Descartes
"It is not enough to have a good mind; the main thing is to use it well." — René Descartes
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.