Is this also forcing chain?

Henk · Last edited by Henk on Wed Feb 01, 2006 12:01 pm; edited 1 time in total

I just improved my forcing chain to also find the following (the yellow cannot be 2):

Is this also a forching chain?

eclark · Posted: Sun Jan 29, 2006 10:47 pm Post subject:

Yes that is a forcing chain.

Anything where all posibilites from a cell cause placements that result in the same conculsion is a forcing chain.

Henk · Posted: Sun Jan 29, 2006 10:50 pm Post subject:

eclark:

Thanks. The reason I asked is that the descriptions I read only mention the forcing chain to assign a value to a cell. But in this specific case, only a candidate can be excluded. When used this way, this technique can be used very often.