Finned Grouped Chain
Finned Grouped Chain: Strong and weak links alternate along a chain, and its ends force a conclusion.
How it works on this board
Either the chain end or at least one fin contains a true 9
7
2
1
4
5
9
1
1
8
5
1
6
3
1
3
5
8
3
9
1
7
6
8
3
1
1
9
6
6
1
5
8
2
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