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