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Subject: Re: New version of EXchess

Author: David Dahlem

Date: 14:04:37 11/20/00

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<snip>
>
>>also it seems if the program uses losses to tune it;s eval, then it can be
>>misinterpreted.
>>for instance, result from a game that was played in 5 min/game, will have lesser
>>values of importance then a game that was played at 40/40 or 40/60.
>>
>>
>>so it can be interpreted that an exchess version that plays only 5min blitz will
>>have one kind of tuned eval, while the other one that plays mainly 40/40 will
>>differant. Which one is  best? :)
>>
>
>Yes, the learning results from 5 min blitz games might be quite different from
>40/40.  One test I did was 200 games with crafty at 1 min bullet.  EXchess lost
>a large percentage of the games in the first 100, but did much better in the
>second 100 (EXchess still clearly lost the match, but the results were
>significantly closer than the first 100 games).  However, when I then matched
>this version of EXchess against GNUchess at longer time controls (5 min blitz, I
>think), my results were not better (and actually a bit worse) than before the 1
>min bullet games against crafty.
>
> - Dan
>
Along the same line, I have a question. Will losing to a much stronger engine
such as Fritz6 or losing to a program weaker  than Fritz6, cause EXchess to
learn much faster or supposedly get stronger quicker?

Dave



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