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