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