PlaySudoku.us
Hard · Puzzle #212
4
3
7
1
2
8
7
4
2
7
9
5
4
1
7
5
6
9
5
8
6
5
7
9
6
1
4
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.