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Subject: Some questions about large hash tables

Author: Peter Stayne

Date: 00:57:57 10/11/03


Lately, I've been having Deep Fritz 7 analyze positions for long periods of time
(from 10-24 hours). I'm certainly going to up my RAM soon from 1GB to 2GB, and
was curious as to what, exactly, will be the benefits for chess programs in
these overlong sessions.

I guess I'm mostly curious what a chess program does when it runs out of hash
space. Is there costly reorganization of the positions in the hash space to fit
new positions in? Or, once it's filled, does it just keep whatever's in there
and work completely from the CPU? Or does it depend on the engine? Would I
notice a speedup in reaching the higher ply numbers (20-ply+)?

Thanks,

Pete



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