Cookie Settings

This website uses cookies and similar means to provide its basic functionalities, for analyzing site traffic to improve the site, and for tailored ads.

Please see our privacy policy for more information and the option to change these settings later.

sudoku.coach

LEARN

Skip Navigation

Alternation Inference Chain (AIC)

Previous 

Part of a family: Chaining-Family

Simple Coloring
X-Chain
3D Medusa
XY-Chain
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

the chain

the candidates we can eliminate

Previous 