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! 👍
2
9
3
6
6
4
2
5
1
7
5
8
9
7
8
7
9
8
6
2
3
5
1
6
7
2
9
6
5
4
9
8
1
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