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Almost ALS

An almost ALS, or AALS is an ALS one step further. An AALS has N cells with N+2 candidates between them. The simplest of AALS's is one trivalue cell. The most obvious thing to use it for is to try to reduce it to an ALS. AALS's have other uses as well, but these are so rare and ambiguous that they are usually not worth learning.

Almost ALS

See also