PlaySudoku.us
Medium · Puzzle #598
2
7
9
5
4
3
6
8
5
7
3
4
2
9
3
5
1
1
9
2
4
6
9
3
5
2
3
5
9
2
7
4
A valid Sudoku puzzle has exactly one solution. If it has two or more, it's considered broken.
A valid Sudoku puzzle has exactly one solution. If it has two or more, it's considered broken.
A valid Sudoku puzzle has exactly one solution. If it has two or more, it's considered broken.
A valid Sudoku puzzle has exactly one solution. If it has two or more, it's considered broken.