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Subject: Re: 'Convenient' ChessBase bug handicapping UCI engines

Author: Brian Kostick

Date: 04:58:29 09/29/03

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On September 29, 2003 at 04:03:10, Gian-Carlo Pascutto wrote:

>It seems that the ChessBase UCI support contains a rather 'convenient' bug
>that severely handicaps UCI engines when playing tournaments under the
>ChessBase interface:
>
>An extract from Deep Sjeng's logs:
>
>First game:
>
>< setoption name Hash value 128
>Allocated 4194304 hash entries, totalling 134217728 bytes, in shared memory.
>
>All subsequent games:
>
>< setoption name Hash value 1
>Allocated 32768 hash entries, totalling 1048576 bytes, in shared memory.
>
>So, they basically disable hashing for UCI engines after the first game.
>
>--
>GCP


I'm sure your feedback and suggestions to ChessBase have helped them get to
UCI.dll version 1,0,1,4. I hope you will try for another and we Fritz 8 users
thank you. I think this will be a better approach than letting them discontinue,
as they did with the WB-CB adaptor. This situation about hash table makes me
wonder about ChessBase.eng files as they are essentially adaptors to engine
authors .dll's. Also depending on how a UCI engine handles hash memory on the
new hash command the changed memory use may be observable with TaskInfo or
similar utility. I will see if I can observe this. BK



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