PlaySudoku.us
Hard · Puzzle #311
5
3
6
8
6
1
9
1
4
2
3
6
8
6
1
4
5
5
3
7
1
7
8
9
7
5
6
5
8
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.
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.