Computer Chess Club Archives




Subject: Re: About False Fail Highs, professionals, and MTD searches

Author: Alejandro Dubrovsky

Date: 04:07:06 04/13/02

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On April 12, 2002 at 15:08:51, Gian-Carlo Pascutto wrote:

>Why don't MTD(n,f) searchers have trouble with this? If the
>PVS can have a fail high/fail low sequence, couldn't this
>happen with MTD(n,f) as well? As far as I see, the result
>would be that the MTD quits (it has converged, after all)
>and ends up with the move that corresponds to the false-fail
>high one in PVS. These are often blunders. Why doesn't this

well, it happens to small potato, and the search is very stable (only
instability introduced is because of the hashtable).  Blunders are somewhat


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