Alternation Inference Chain (AIC)

Difficulty

Brutal

Description

The Alteration Inference Chain (AIC) technique is the combination of 3D Medusa and X-Chain, meaning we

  • look for alternating weak and strong links, and
  • consider links between identical candidates within a region, as well as
  • different cell candidates within a single cell.

If you have not read about 3D Medusa and X-Chain, do it now. AIC just combines the two and doesn't bring anything new to the table.

As before: any candidate that is at least weakly linked to both colors ( and ) can be eliminated.


AIC Examples

possible solution group
possible solution group
the candidates we can eliminate