Pro Tip

When a row, column, and box all intersect, the intersection cell is the most constrained — always check it first.

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

"We suffer more often in imagination than in reality." — Seneca

Food for Thought