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