PlaySudoku.us
Medium · Puzzle #859
4
7
9
8
3
3
9
5
4
7
8
2
3
9
8
5
2
1
5
8
2
1
9
4
3
2
7
5
8
6
9
1
7
8
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.