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Subject: Re: WCCC and some NPS observations

Author: Amir Ban

Date: 05:24:45 06/25/99

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On June 24, 1999 at 09:50:02, blass uri wrote:

>On June 24, 1999 at 07:33:13, Thorsten Czub wrote:

>>and even junior, having a better position, made mistake after mistake
>>until shredder killed it.
>I can only say that I feel quilty for the fact that Junior did not understand
>the bishop endgame.
>Amir Ban told me something about the evaluation function of Junior
>I had the feeling that it may be wrong but I did not see practical examples in
>the games that I played so I did not tell him and prefered to concentrate in
>practical problems from my games.
>I am sure that he will fix it in the future but unfortunately it is too late for
>this championship.

I don't know of mistakes Junior did in the bishop endgame, and if anyone can
point them out, I want to know. If I'm right, the critical mistake was 40... Bd3
allowing white to force the rook trade.

I could see that Shredder thought so. It became happy at 41.Rb2 and at 45.Kf2
was already north of +1. Why this is so was a mystery to Junior and is still not
clear to me. Apparently black should have the edge here because his pawn mass is
on the wing and his king is better placed to stop the passed pawn. That's in
theory. In practice white has no problems, and has amazing tactical possiblies
around his central pawn mass, including various pawn and bishop sacs and several
interesting zugzwang options.

During the game I asked Alterman about the rook trade possibility, and he
casually said black wins immediately. He changed his mind later, but this shows
that a casual evaluation is that the bishop endgame is in black's favour.

I'm interested to hear other opinions.


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