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Subject: Re: CCT4 Sjeng operator viewpoint.

Author: David Rasmussen

Date: 07:57:13 01/21/02

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On January 21, 2002 at 09:34:51, Chessfun wrote:

>
>Round 5.
>Sjeng v Chezzz 1/2 - 1/2
>A strange game, which early on I thought was going to be a clear win, but which
>turned into a scrape for a draw. After the opening Sjeng seemed to have a clear
>advantage positionally, but choose to play 14. Nh5 instead of the clearly
>winning Bd3. Not to worry as after 14....Bc8 we can still play 15. Bd3 but this
>time played IMO the odd looking Qe1. After exchanging queens Sjeng played 18.
>fxg7 and I was concerned about my opponent playing 18....Re8 however fortunately
>he choose to take the pawn on g7 and by move 21. we have a position that
>although white holds the keys, seems drawn. On my other PC, I have Fritz 7
>running, seeing my opponents evals as they were kibitzed. I was concerned, as it
>seemed to me, my opponent was clearly on the right track as far as understanding
>the position, while it seemed that Sjeng didn't see that he was in trouble.
>Between moves 21-58 it seemed Chezz played almost flawlessly then somehow at
>move 60 lost track playing 60.....Rh4+ when either c2 or Kd3 appear to win.
>Chezzz having tablebases would also probably have helped it, in the end a lucky
>draw for Sjeng.
>

Argh, don't remind me... :)

Chezzz wanted Rh4+, but then suddenly failed high on c2. It took a long time to
resolve, and I didn't pay attention. When it suddenly moved, it move Rh4+, and
thought "aaaaaargh...." (I say that a lot). I thought I had a bug, so that the
fail high move wasn't played. When I checked the logs later, I found that it was
a false fail-high, and that Chezzz eventually chose Rh4+. No bug there. I don't
know why it chose that, or why Rh4+ doesn't win. I don't even know if c2 wins.
Tablebases saved Sjengs behind here, I think :)

/David




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