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Subject: Re: Some analysis of Deep Fritz for kasparov-deeper blue first game

Author: Robert Hyatt

Date: 11:43:05 05/07/01

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On May 07, 2001 at 12:30:30, Vincent Diepeveen wrote:

>>
>>No, he didn't "prove" anything at all.  You can't take output from a program,
>>output that is incomplete due to the way they produce their PV, and then try to
>>draw conclusions from it.  Any more than you can take evaluations and draw
>>conclusions from them without any idea of what the evaluation looks like
>>internally...
>
>It's hard to argue with scores produced Bob!\

Why is that?  Crafty vs Diep.  Crafty says +2.5, Diep says -.2, Crafty
wins.  Big score difference.  You do things (queen is way better than 2
rooks, for example) that I consider unsound.  But if you _just_ look at
the scores, you can't conclude very much without a PV to show whether I
see winning more material and you haven't seen it yet, or is this a
pure positional thing...

You are just looking at the scores, since you can't possibly see the PV from
DB.





>
>Also it fits into the picture. I remember once you posted that they
>tuned their search parameters using 1 ply searches using automatic
>testing & tuning.


I didn't report that.  They did...

>
>That never worked for me actually. Not a single machine can tune my
>parameters like i can tune them! And i tune myself pretty when compared
>to what is possible!


That doesn't mean it didn't work for them...  You change your mind more
often than the weather changes.  1.  A cluster can _never_ work playing
chess.  2.  I am working on a cluster version of Diep that will be ready
soon.

make up your mind...

Just because _you_ can't do it doesn't mean nobody else can.  I did things in
the Cray Blitz parallel search you can't do easily...  They can also do things
you can't do easily...




>
>However that sort of tuning makes more sense to me
>when using preprocessor tables!

Always stay in that box when thinking...  Don't ever think bigger...




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