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