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