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Subject: Re: We could do ChessTiger vs. CSTal and discuss the games...

Author: Thorsten Czub

Date: 13:10:17 04/09/98

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>What you describe can be achieved by a "classic" minimax approach. As
>far as I know, Chris Whittington did not claim he had a new search
>algorithm, but he did claim that his evaluation was different.

Almost anything in chris chess-engine looks weird.
I am not sure if you can relate it very easily.
We should ask chris. One thing is for sure: CSTal has very different
evaluations, very different main-lines and sacs and also sacs where all
other programs say: there is no sac possible. And suddenly, after a few
moves, the others find out about.


>CSTal behaviour could be the effect of a non-minimax algorithm, but not
>necessary. Maybe Thorsten can shed some light on this? Without betraying
>Chris secrets, of course.

In the moment I am not sure about Chris wishes and if I am still allowed
to say anything because we had some arguments and - as I told before, he
claimed that work on CSTal is over.
This would not allow me to say anything, especially when he ended the
friendship with me, I would not be allowed to say anything.

If you want we can post a few strange positions only CSTal finds and ask
the others what happens there. We can post the sendinfos/log-files of
CSTal.

I could e.g. let CSTal fight vs. ChessTiger (so that people will not
say: ough - you cheated because you are against ANTI Fritz) .
I like ChessTiger AND CSTal and we could see how both programs fight
each other and you Christophe could maybe comment why Tiger played
soandso.
And maybe we get chris to comment why CSTal played soandso.
If we choose Tiger vs. CSTal people would not THINK this is a campaign
AGAINST a commercial program.

Maybe this would clearify enough to
show where CSTal is different.

In Aegon I did the same with Don Daily, played some games vs. his
single-cilk-chess-program and that was also very very funny. Cilk
always had the better materialistic position (one pawn ahead or more)
but lost the games due to eat to much.
The games were exiting.

>
>    Christophe

How about this idea ??

As cstal has the log-file feature like crafty (and others) have, we can
easily post the main-lines and evals...
No cheating possible :-)))



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