PlaySudoku.us
Medium · Puzzle #376
5
4
9
2
5
6
6
1
9
3
4
8
2
9
8
6
4
7
6
8
2
4
3
4
3
8
5
9
6
7
5
4
9
"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.