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Subject: Re: A New Self-Play Experiment -- Diminishing Returns Shown with 95% Conf.

Author: blass uri

Date: 15:19:31 05/24/00

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On May 24, 2000 at 18:16:05, Dann Corbit wrote:

>On May 24, 2000 at 17:46:55, blass uri wrote:
>>On May 24, 2000 at 17:27:19, Dann Corbit wrote:
>>>I have a bit of a puzzle.
>>>
>>>In these experiments, you varied the depth from 5 to 12 plies, but in the "goes
>>>deep" experiments, it was deeper, if I recall correctly.
>>
>>It was deeper but it was not based on comp-comp games and I think that the
>>positions do not demonstrate what happens in comp-comp games(I read that the
>>positions were taken from kasparov-deep blue games and if this is the case
>>kasparov chose positions that computers do not understand so the fact that they
>>changed their mind even at big depthes is not surprising(you change your mind
>>when you have no idea what to do).
>>
>>>
>>>In the earlier experiments, it seemed to level out.
>>>
>>>I would like to see control matches where the plies are equal.
>>>IOW, 5:5, 6:6 up to 12:12.
>>>In that way, you will know what the gain of the extra ply is.  I don't think you
>>>can tell clearly strictly from the data given.
>>>
>>>For example, in your 12 <==> 11 experiment, you show 35.71% wins, 52.38% draws,
>>>and 11.9% losses.  What would the result be for 12:12?
>>
>>I guess that the result will be 50% because Fritz6 played against itself.
>
>I will be shocked if it turns out that way.  For instance, no computer chess
>program has a perfectly symmetrical eval.

I do not believe that this generaliztion is correct but it does not change the
fact that the expected result of program against itself is 50%

Uri



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