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

Author: Tord Romstad

Date: 04:02:04 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.

Oh, my God.  This is horrible.  How widely known is this bug?

My engine slows down by about 50% when I limit the hash table size to 1MB.

Tord




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