🚀 go-pugleaf

> > Am looking for considerations I may include in my evaluation function.
> > What is the vealuation function used in today chess prog (gnuchess for
> > example). What Am I missing ? any help is very appreciated (articles,
web
> > refernces, source code).
>
> I listed out some the things Crafty uses it in evaluation
> function in the following note of computer chess.
>
> http://www.wretched.demon.co.uk/Chess.htm
>
> Mobility, and centralisation, are two terms you didn't mention,
> that feature heavily in most programs.
>
Yes am really searching how to express theses notions (Mobility,
centralisation and among other) programmaticlly keeping in mind that a time
consuming evaluation may leed to large response time : am searching a
compromise.
> GNU Chess uses a lazy evaluation, where the material deficit is
> larger than any previously seen positional compensation, it
> assumes a cut down evaluation function is sufficient to
> recognise a position where material has been lost unnecessarily.
> I think this will keep.
>
> GNU Chess also recognises specific ending in he evaluation
> function, so as to win KBNvK, or to try and evaluate KPvK
> quickly.
>
> GNU Chess and Crafty are both available as source, amongst other
> engines, if you need more ideas.
For gnuchess and crafty I am downloading source code to see what they do in
more details.


>
> > Is there some consideration for the size of the opening book (am using a
> > little book : 5 openings) ? Is this really important ?
>
> I think in opening books quality is as important as quantity,
> even if you only give it a handful of lines for each side, for
> as long as they are well thought out it'll still be playing good
> chess. Of course at the higher levels of chess a comprehensive
> knowledge of opening positions is necessary to avoid wasting
> time reinventing old analysis, at least computers don't tire
> whilst rediscovering old opening theory.
Thank you for ur help
Regards.