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