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Subject: Re: What's really odd is...

Author: Vasik Rajlich

Date: 11:32:59 12/14/05

Go up one level in this thread


On December 14, 2005 at 14:14:36, enrico carrisco wrote:

>On December 14, 2005 at 05:30:59, Vincent Lejeune wrote:
>
>>On December 14, 2005 at 05:22:16, Gian-Carlo Pascutto wrote:
>>
>>>On December 14, 2005 at 05:13:48, Joachim Rang wrote:
>>>
>>>>On December 14, 2005 at 05:06:41, Mimic wrote:
>>>>
>>>>>==============================================================
>>>>>Rybka 1.0 Beta 32-bit  +282-130=388  59.50%  476.0/800   +66
>>>>>--------------------------------------------------------------
>>>>>Fruit 2.2.1            +130-282=388  40.50%  324.0/800   -66
>>>>>==============================================================
>>>>>
>>>>>  Games       Rybka
>>>>>========================
>>>>>  100          +31
>>>>>  200  -----   +33
>>>>>  300          +50
>>>>>  400  -----   +50
>>>>>  500          +53
>>>>>  600  -----   +60
>>>>>  700          +63
>>>>>  800  -----   +66
>>>>>========================
>>>>>
>>>>>Pentium M Dothan 2.52Ghz
>>>>>32MB Hash
>>>>>No EGTB
>>>>>
>>>>>Mimic
>>>>
>>>>has Rybka some hidden learning? The steady increase of the rating difference is
>>>>surprising.
>>>
>>>The rating difference didn't increase, just the plus score. (And it wasn't
>>>steady, either)
>>>
>>>--
>>>GCP
>>
>>
>>No, +66 is the rating difference, not the score difference.
>>
>>Surprisingly it doubled between 200 and 800 games...
>>Who know it will be after 1200 games ...
>
>Rybka scores SIGNIFICANTLY better (15-20%+) vs. a given opponent (Fruit 2.2.1 in
>this case) in an engine-engine match than it will in a tournament style match
>with MORE than two engines (i.e. engines being routinely loaded and unloaded.)
>
>Try it yourself.
>
>Regards,
>
>-elc.

There is no learning or opponent recognition in Rybka, so this observation is
likely an anomaly.

The only other explanation is that the opponents are "learning" :)

Vas




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