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

Author: Peter Hegger

Date: 10:18:50 09/06/99

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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




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