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