3
5
6
9
2
6
4
7
5
3
2
5
1
9
6
3
5
8
6
7
4
3
1
5
6
4
6
4
8
7
2
2
5
6
9
7
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya
Look for digits that already appear 7 or 8 times on the board — they're the easiest to place last.
Look for digits that already appear 7 or 8 times on the board — they're the easiest to place last.