Singly Linked ALS-XZ Rule
Two sets holding one digit more than they have cells, joined by one shared digit. The other shared digit goes from every cell both sets see.
How it works on this board
Two ALSs share one restricted common candidate that cannot be true in both
3
6
2
4
1
4
2
6
2
4
5
1
3
4
6
6
5
4
7
4
2
6
1
5
4
7
3
5
8
2
4
9
3
8
6
4
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