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Subject: Re: Deep Blue's 8.Nxe6 in Game 6 a forced win?

Author: Vincent Diepeveen

Date: 19:02:26 09/16/03

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On September 15, 2003 at 18:56:30, Mike Byrne wrote:

>On September 15, 2003 at 09:11:25, emerson tan wrote:
>
>>I played a 24 game match between Shredder 6.02 and Hiarcs 7.32 with the
>>following opening.
>>
>>1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 h6 8.Nxe6
>>
>>Time control was 40/4hrs + 20/2hrs + 2hrs to finish on a 1.8 Ghz processor.
>>
>>Shredder played all the white games and Hiracs all the black games. The score
>>went 13-11 in Hiarcs favor. Only a couple of games were drawn.
>>
>>I choose Shredder 6.02 to have white because it likes whites position and
>>without an opening book, it will play the 8.Nxe6 sacrifice. Also, Shredder has a
>>positional learning. I choose Hiarcs for black solely because of its positional
>>learning. Positional learning is important in this one opening match since it
>>will be able to learn and improve its next play based on the same opening.
>>
>>Maybe 8.Nxe6 is not a forced win for white. Maybe Kasparov can study it and use
>>it in some high profile match against computers since most of the programmers
>>might put it in their books thinking its a forced win for white.
>
>
>There is one hint that Joel Benjamin likes Nxe6 - since this move was not
>calculated but in DB's opening book.   Although not certain, I suspect to leave

No it was not put in the book by Joel Benjamin.

They had a big random book and this definitely was played out of a random book.
No chance they could guess kasparov would play this line in caro-kann against
them.

Benjamins book was just 4000 moves. See Hsu's publication in Artificial
Intelligence journal.

With 4000 moves you can't even cover a few lines of the najdorf.

Best regards,
Vincent

>this move in the opening book - they very much like the way DB played this from
>the white side. As someone else mentione - top GM's are not playing h6.  I read
>(heard) somewhere that GK played h6 since Fritz never played Nxe6  against him.
>Kudo's to the DB team for leaving this move in the book.  I suspect if GK
>thought this move (Nxe6) was in the opening book, he never would have played h6.
> Do anyone believe GK would have played h6 against a top GM - not in my opinion.
> Another example of GK changing his game, and perhaps too much, because he was
>playing a computer.  IMO, he would have much better and more interesting chess
>if just played his usual game of attacking chess.  The New York Times (May 13th
>1997) said "The Chess litature has warned against that particular error (7....
>h6) since 1987 and everyone knows how to avoid it"



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