XY-X-Chain
A chain of two-candidate cells with same-digit strong links mixed in. Candidates incompatible with either possible true end are removed.
How it works on this board
At least one end of the chain must be true
9
5
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4
5
8
9
4
9
3
5
6
1
2
8
5
4
7
3
4
3
6
7
7
3
2
5
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6
3
9
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