9
2
5
8
9
3
8
9
3
4
1
7
4
2
6
2
8
4
5
8
7
5
1
3
9
7
4
5
3
6
7
9
4
2
2
6
1
"Imagination is more important than knowledge." — Albert Einstein
"Imagination is more important than knowledge." — Albert Einstein
If pointing pairs aren't visible, try box-line reduction. They're inverses — if one fails, try the other.
If pointing pairs aren't visible, try box-line reduction. They're inverses — if one fails, try the other.