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Subject: Re: What about the result of game Rebel-Hoffman? (NT)

Author: Peter Hegger

Date: 13:47:06 09/06/99

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On September 06, 1999 at 15:41:50, Paulo Soares wrote:

>On September 06, 1999 at 13:18:50, Peter Hegger wrote:
>
>>On September 06, 1999 at 06:26:24, Paulo Soares wrote:
>>
>>>On September 06, 1999 at 00:07:08, Robert Hyatt wrote:
>>>
>>>>On September 05, 1999 at 23:48:31, Paulo Soares wrote:
>>>>
>>>>>On September 05, 1999 at 12:49:02, Peter Hegger wrote:
>>>>>
>>>>>>On September 05, 1999 at 04:38:57, Paulo Soares wrote:
>>>>>>
>>>>>>(Snip)
>>>>>>>
>>>>>>Independent  the problem happened with Rebel, I think GM
>>>>>>>Hoffman had the merit of choosing an opening that the programs
>>>>>>>have difficulty to play.
>>>>>>>
>>>>>>>Paulo
>>>>>>
>>>>>>I watched the game at ICC yesterday and the general consensus among the
>>>>>>spectators was that playing a Benko was an *awfully* risky undertaking against a
>>>>>>computer. I have to agree. A healthy Rebel 10-5 that wasn't playing lemons like
>>>>>>Ra2 (forget which move) or the terrible Rg4, just to name a couple, wouldn't
>>>>>>have lost the extra p quite so quickly IMHO.
>>>>>>Full credit to Hoffman though. He pounced on Rebel's errors swiftly and
>>>>>>accurately.
>>>>>>I hope to see them paired up again sometime.
>>>>>>Regards
>>>>>>Peter
>>>>>
>>>>>The Benko Gambit is usually played for draw by blacks, and great part of the
>>>>>resulting positions of this defense are difficult for programs evaluation.
>>>>>Hiarcs7.32 also plays 19.Ra2.
>>>>>My point in this subject is: coulded  any program draw with a GM in the line
>>>>>that was played? My opinion it is that any program would lose this game for
>>>>>a GM, unless there was an arduous preparation in the program's book.
>>>>>Paulo
>>>>
>>>>I think Rebel could well have won this game...  I saw evals of around +1 for
>>>>several moves, but then fishy things started to happen.  I don't think white
>>>>was in danger of losing this at all, until hardware problems produced bogus
>>>>moves.  White might not have been able to win, maybe, but it was certainly
>>>>not going to lose (I don't think) assuming it didn't make some gross mistake
>>>>later on...
>>>>
>>>>The GM made his share of mistakes too...
>>>
>>>Ed said that when Rebel was out of the book, after 15..Rb7 the machine crashed.
>>>So that of there in before it becomes difficult to do an analysis of Rebel's
>>>moves, but I made some tests with other programs, and I think that they don't
>>>analyze well the position, because the evaluation of the candidates moves are
>>>very similar.
>>>The first move played by white after the opening was 16. Qc1, a doubtful
>>>movement(I read now in a Ed's post some words that confirms this). 17. Bh6,
>>>19. Ra2 and 23.f4 don't also seemed good moves.
>>>I think that soon after 23.f4 Rebel was already in an inferior
>>>situation, and agaisnt a GM this can means a lose.
>>>The book used was the same as it was used by Rebel in the World
>>>Championship in Paderborn, would not be very important for Rebel use a
>>>specific opening book for the games against GMs? Only a question.
>>>
>>>Paulo
>>
>>Hi Paulo
>>
>>I still think it was risky to gambit a pawn, especially when it gives white a
>>passer on the a-file. Against another human perhaps it would work, but against a
>>computer I think a QGD or Queens Indian type set-up might have been safer.
>>That's just my opinion though.
>>If you don't mind could you post the other programs evals on 16 Qc1, 17 Bh6 and
>>19 Ra2? I don't have any programs strong enough to do a trustworthy analysis.
>>I'm interested to know how the other programs would have fared out of the
>>opening. Thanks.
>>Peter
>
>Gambit Benko is an opening used in games among GMs, I think that a GM can also
>use it against a program.
>Want you analyzes of other program after white played  16.Qc1?
>
>Paulo

Yes, Paulo if you have the analysis by Fritz and/or Hiarcs I'd be interested to
see
it.
Regards,
Peter



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