Author: Robert Hyatt
Date: 16:11:30 06/17/02
Go up one level in this thread
On June 17, 2002 at 12:39:30, Gian-Carlo Pascutto wrote: >On June 17, 2002 at 11:25:36, Robert Hyatt wrote: > >>Your first move returns a score of +1. Your next move fails high. With the >>wide window, it then returns a score of -1. You stick with that. Do you >>really want to? Most likely it is correct to do so, but you just _lowered_ >>the score at the root. Will you now use a lot more time trying to fix a >>problem that isn't there? > >Here you're talking about the PVS searches. I'm having the aspiration >window search in mind. > >If this happens in a PVS research, I ignore the fail high. > >You can't do that (as easily) in the aspiration search. > >-- >GCP I agree, but I was talking about the aspiration window search at the root. You get a fail high based on an old hash table entry. The research can fail low if you use the new bound of beta, + infinity. If you try to fix that by searching with original value, + infinity, you can get a _lower_ score and confuse things. I don't see any way to solve that.
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