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