Pro Tip

Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.

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

Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.

Pro Tip