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Subject: Re: strange behavior in the chessbase gui involving rybka

Author: Günther Simon

Date: 05:15:34 03/01/06

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On March 01, 2006 at 07:19:36, Joseph Ciarrochi wrote:

>try this position out with rybka 13d
>
3qk2r/1p1nbppp/2r1p3/3p4/Q2P1B2/2NbPN2/PP3PPP/R3K2R w KQk - 0 13
>
>initially, rybka wants to play rd1  (which i think is bad)
>
>Then, when i take back a move and forward to the same position, (be7-bf8-be7),
>rybka wants to play rc1, h4, or qd1 at depth 12.
>
>
>Then, i clear hash table and it goes back to wanting to play rd1. all parameters
>are set to default (and preserve analysis is not checked)
>
>can anybody replicate? Explain? This inconsistency is bad for analysis, as one
>frequently goes back and forth in a position.

? This is just expected behaviour for all chess programs using
hashtables... I don't see your problem?
Actually it is _good_ that something is 'learned' when going
back and forth.
If you want to reproduce an analyis you always have to clear the hashtables,
(even then it will not work for non deterministic programs),but most here
know this of course.

Guenther




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