Computer Chess Club Archives




Subject: Mobility in eval

Author: Willie Wood

Date: 16:24:55 11/24/97


I recall reading that some programs, like Ferret, don't use mobility in
their eval functions, and I would guess that's for speed.  I've been
trying to do without mobility as an experiment, and it's been a bit
tough to get the bishop to know what it's doing.  Anybody have a hint?

Another issue is the tree explosion that occurs with check extensions.
Hyatt mentioned the use of fractional ply extensions on replys-to-check,
though I don't see how that avoids being arbitrary (my lack of
understanding).  I wonder if there's a good check-pruning method that
would avoid chasing the king all over the board?


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