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Subject: Re: Deep Blue

Author: Uri Blass

Date: 03:22:31 08/02/01

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On August 02, 2001 at 04:12:24, Dann Corbit wrote:

>On August 02, 2001 at 04:03:25, Joshua Lee wrote:
>
>>A bunch of posts mention Hardware being Deep Blue's strength but can't you take
>>the program if you knew what the eval, parameters, etc and put it on a regular
>>computer? You wouldn't get the same nodes obviously , but it would play chess
>>the same way right?
>
>I think you will have to take an entirely different track, trying to emulate
>Deep Blue in software.
>
>Because they had *LUDICROUS* compute power at their disposal, they could make
>choices nobody else would ever dream of.  All of the top PC programs agressively
>prune.  They may not use null move, but something else like it instead.  If you
>can hit a peak of one billion NPS, you can do things differently.
>
>It really does not make any sense to emulate deep blue on PC software.
>Unless you want to wait three months between moves.

It makes sense in order to emulate a match between deep blue and top programs.
If we can emulate Deep blue in software and get machine that get often the same
pv's and the same evaluations(I say often and not always
because of the fact that programs that use more than one processor are not
deterministic) then it means that we can do a match with ponder off between top
top programs and Deeper blue.

the program that emulates Deeper blue may need to use 3 monthes per move in
these conditions for the first moves but later the time is going to go down
because of hardware improvements.

The main problem is the fact that we do not know the exact algorithm of
deeper blue in order to do it and finding the exact evaluation and the exact
extension rules of deeper blue when we have only the logfiles of the games
is a very hard problem.

Uri



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