Pro Tip

Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.

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

Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.

Pro Tip