Use Empty Rectangle technique(1 / 1)
Find a cell where a candidate can be eliminated using Empty Rectangle technique.
If you are not sure how to look for Empty Rectangles then check the materials below or click on a "Hint" button.
6
1
2
5
8
3
4
4
3
8
1
2
6
8
2
6
3
4
7
1
2
3
6
8
1
8
5
3
2
6
4
6
8
2
7
3
2
1
5
4
8
6
9
7
4
2
6
8
8
6
3
1
2