9
3
1
4
3
5
9
8
5
2
3
7
4
6
1
6
2
8
4
9
6
1
7
5
6
2
3
7
6
1
8
Hidden Triple: three digits each appearing in only three cells within a group — eliminate all other candidates from those three cells.
Hidden Triple: three digits each appearing in only three cells within a group — eliminate all other candidates from those three cells.
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.