PlaySudoku.us
Hard · Puzzle #600
7
8
9
1
3
2
5
6
5
1
8
9
2
4
3
6
2
3
3
8
3
8
6
9
5
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.