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