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Subject: Re: Deep-Blue vs Kasparov, 2.game,

Author: Ed Schröder

Date: 12:09:48 05/20/00

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On May 20, 2000 at 13:20:47, Bruce Moreland wrote:

>On May 20, 2000 at 10:04:58, Ricardo Gibert wrote:
>
>>On May 20, 2000 at 09:27:39, Robert Hyatt wrote:
>>
>>>On May 20, 2000 at 07:11:31, Terje Vagle wrote:
>>>
>>>>1r6/5kp1/RqQb1p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 b - -
>>>>
>>>>After 45. Ra6, Fritz suggests Qe3 for black and evaluates the position as 0,94.
>>>>It does not seem to find the famous draw-line for Kasparov.
>>>>10 hours analysis on PIII-600, and 28006383 KN evaluated
>>>>
>>>>Does any other program find the draw-line?
>>>>
>>>>
>>>>Regards
>>>>
>>>>
>>>>Terje
>>>
>>>The draw is somewhere around 60 plies deep, total.  I don't think anyone is
>>>going to find that.
>>
>>60 plies? No way. More like half that. A lot of humans have no trouble
>>calculating the draw to the end. I found it myself without any assistance of any
>>kind. The only thing difficult about that draw is the psychological barrier.
>>This Kaspy failed to overcome as we all know.
>>
>>As for computer programs, judging from the Chris Janeke post, commercial
>>programs have no trouble finding the draw with a 5 ply headstart. If it were
>>really 60 plies, I don't see how that would be possible.
>
>Oh yeah?  You'd see the part that goes h4 h5?  It's not that easy.  I helped
>analyze this with a GM and an IM the day it happened, and they spent hours
>trying to prove that there was a win.

More: after all the checking moves there is a quiet move on ply 30 (or so)
which will cause a pruning. No surprise no program has found the draw yet.
Somewhere on my pages is the full analysis of this immortal position.

Ed

>bruce



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