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Subject: Re: Game 2 - did IBM cheat?

Author: Uri Blass

Date: 08:19:41 06/07/05

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On June 06, 2005 at 20:36:55, Vincent Diepeveen wrote:

>On June 06, 2005 at 17:25:51, Jack Lad wrote:
>
>>[Event "IBM Kasparov vs. Deep Blue Rematch"]
>>[Site "New York, NY USA"]
>>[Date "1997.05.04"]
>>[Round "2"]
>>[White "Deep Blue"]
>>[Black "Kasparov, Garry"]
>>[Opening "Ruy Lopez: closed, Smyslov defense"]
>>[ECO "C93"]
>>[Result "1-0"]
>>
>>1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6
>>8.c3 O-O 9.h3 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bd7 13.Ng3 Na5 14.Bc2 c5
>>15.b3 Nc6 16.d5 Ne7 17.Be3 Ng6 18.Qd2 Nh7 19.a4 Nh4 20.Nxh4 Qxh4
>>21.Qe2 Qd8 22.b4 Qc7 23.Rec1 c4 24.Ra3 Rec8 25.Rca1 Qd8 26.f4 Nf6
>>27.fxe5 dxe5 28.Qf1 Ne8 29.Qf2 Nd6 30.Bb6 Qe8 31.R3a2 Be7 32.Bc5 Bf8
>>33.Nf5 Bxf5 34.exf5 f6 35.Bxd6 Bxd6 36.axb5 axb5 37.Be4 Rxa2
>>38.Qxa2 Qd7 39.Qa7 Rc7 40.Qb6 Rb7 41.Ra8+ Kf7 42.Qa6 Qc7 43.Qc6 Qb6+
>>44.Kf1 Rb8 45.Ra6 1-0
>>
>>http://chess.eusa.ed.ac.uk/Chess/DeepBlue97/game2.html
>>
>>Which was the human like move that DB should not have played according to GK?
>
>37.Be4
>
>however this is big BS from kasparov. first of all crafty and diep in those days
>used to play Be4 too at 10-12 ply or so.
>
>The point is that deep blue just got 11 ply and we search deeper, so our engines
>play Qb6 in the end, deep blue with its shallow 1997 searches was happy to hit
>11 ply and didn't get to 13 ply or so where Diep by then plays Qb6.
>
>Please note that 37.Qb6 is a forced win for white, as also Seirawan indicated.
>I've been writing out here in CCC a few years ago the winning line for about 20
>moves or so until real huge scores for Qb6.

What is the proof?

Note that you need to prove the following after 37.Qb6:
1)37...Rxa2 is losing
2)37...Bc7 is losing
3)37...Rd8 is losing
4)37...Bf8 is losing
5)37...Qf8 is losing

Next best are losing at least a piece for a pawn with no chance for perpetual
and I am convinced that they lose.

Uri



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