1
7
8
1
9
4
6
4
2
3
1
4
3
4
5
9
6
5
4
2
1
3
7
8
4
1
7
5
2
6
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.