Grouped Alternating Inference Chain (Grouped AIC)
An AIC whose nodes may be groups of cells inside a box.
How it works on this board
At least one end of the chain must be true
2
1
8
1
4
9
3
5
9
1
6
2
4
7
5
9
5
4
7
5
9
8
6
1
5
7
3
1
6
1
9
5
6
2
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