PlaySudoku.us
Hard · Puzzle #410
5
4
1
7
1
4
1
2
8
6
3
1
2
9
2
3
5
4
6
1
8
5
5
9
6
3
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.