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Subject: Re: 1.d4 d5 2.c4 without book?

Author: Ed Schröder

Date: 01:12:21 10/02/98

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>>If I set the Pawn/square value for c4 high enough, KnightCap will play
>>c4 without an opening book :-)

>Of course, every program can do this, but that's not what I wanted to know. What
>I meant was which program plays the queens gambit without book, without weird
>tuned piece square tables and without learning data (Ed, I think you use the
>database information for tuning the piece square tables, too, or are you doing
>some more sophisticated with it?), and - maybe this is the main point - _not_
>because it can get back the pawn with Qa4+.

Hi Steffen,

I don't use the piece-square tables to make Rebel play 2.c4

I have made a chess tree from a good database. Rebel consults the chess tree and
finds for 2.c4 a good score (say 55%) in (say 4000) games with an average elo of
(say) 2400.

Based on this data I add a "flexible" bonus to 2.c4

The bonus can vary from -1.00 to +1.00

Rebel gives the following information:

Move    %   Games   Bonus
2.c4   58% 17.806   +0.52
2.Nf3  55%  6.775   +0.23
2.e4   60%    379   +0.25
2.Bg5  59%    299   +0.25

So based on the chess tree a 0.52 bonus is added to 2.c4 which will force
Rebel to play the move.

- Ed -


>Greetings,
>Steffen.




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