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