PlaySudoku.us
Hard · Puzzle #42
2
1
5
1
5
6
9
2
8
6
4
3
9
4
6
2
1
4
2
8
7
2
9
7
8
9
6
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.