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Subject: Re: More about ChessBase UCI bug (affects tablebases too)

Author: Peter Fendrich

Date: 02:59:22 09/30/03

Go up one level in this thread


On September 30, 2003 at 05:34:57, Gian-Carlo Pascutto wrote:

>Apparently, it doesn't always happen. I can fully reproduce it in the original
>tournament I had set up, but if I make another similar tournament, things work
>as they should.
>
>I'm afraid this means that even the people claiming things work for them
>aren't safe, since it's more or less random (I'm guessing an uninitialized
>variable or something like that), and they will get bitten later even though
>it seems to work at first.
>
>Another data point:
>
>This is how it looks when it works correctly:
>
>Sjeng: < uci
>
>id name Deep Sjeng 1.5
>id author Gian-Carlo Pascutto
>option name Hash type spin default 165 min 1 max 495
>option name NalimovPath type string default c:\tb\
>option name NalimovCache type spin default 4 min 1 max 495
>option name Ponder type check default true
>option name MultiPV type spin default 1 min 1 max 60
>option name CPUs type spin default 1 min 1 max 1
>option name Drawscore (centipawns) type spin default 0 min -75 max 75
>option name Anti Human mode type check default false
>option name Personality type string default <empty>
>option name Store brain type button
>option name Load brain type button
>option name Clear Hash type button
>uciok
>< setoption name Hash value 128
>Allocated 4194304 hash entries, totalling 134217728 bytes, in shared memory.
>< setoption name Ponder value false
>< setoption name NalimovPath value d:\crafty\tb
>< setoption name NalimovCache value 16
>< isready
>readyok
>
>This is how it looks when the bug occurs:
>
>Sjeng: < uci
>
>id name Deep Sjeng 1.6Y
>id author Gian-Carlo Pascutto
>option name Hash type spin default 165 min 1 max 495
>option name NalimovPath type string default c:\tb\
>option name NalimovCache type spin default 4 min 1 max 495
>option name Ponder type check default true
>option name MultiPV type spin default 1 min 1 max 60
>option name CPUs type spin default 1 min 1 max 1
>option name Drawscore (centipawns) type spin default 0 min -75 max 75
>option name Anti Human mode type check default false
>option name Personality type string default <empty>
>option name Store brain type button
>option name Load brain type button
>option name Clear Hash type button
>uciok
>< setoption name Hash value 1
>Allocated 32768 hash entries, totalling 1048576 bytes, in shared memory.
>< isready
>readyok
>
>Notice that not only is the hash not set, tablebases are disabled too!

Also that ponder is true the second time but not the first time.
/Peter





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