Pro Tip

When a box has only two empty cells, you know exactly which two digits fill them.

Pro Tip
✓ Completed! 👍
3
9
4
2
6
8
5
4
7
2
4
3
3
6
1
2
1
4
5
8
6
2
9
5
6
8
1
Food for Thought

"The more I read, the more I acquire, the more certain I am that I know nothing." — Voltaire

Food for Thought