PlaySudoku.us
Hard · Puzzle #131
7
3
7
9
2
1
3
4
2
5
9
5
7
4
2
4
3
5
7
9
6
6
5
3
9
3
9
4
7
1
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.