5
9
2
4
7
1
3
4
9
3
1
9
2
4
8
4
6
7
8
4
1
4
8
7
5
9
2
1
9
7
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.
Complete an Evil puzzle from start to finish in a single uninterrupted session. No breaks, no distractions.
Complete an Evil puzzle from start to finish in a single uninterrupted session. No breaks, no distractions.