Author: Jan Pernicka
Date: 03:27:35 01/10/00
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On January 09, 2000 at 22:36:57, leonid wrote: >Hello! > >What is a use of extensions and what kind of extensions existe in chess game? > >Thanks for explanation! >Leonid. Hi, You may think extensions while searching a game tree - OK? So, normally you search to a fixed depth, say 5 plies (standard for my program...), but some branches could or should be searched deeper because they are "interesting" - e.g. when capture or check happens, you should also perform "quiescence seach" at the leaves to get a stable position - it means - no direct threats are present ( - you are not in the middle of the wild sequence of capturing ...), You could use any other extensions of your own ( e.g. a paw gets to the 7th rank ...) but be careful of exponential explosion... Well, this was only a little resume and I don't know if it answers your question at all... Have a nice day. John P.
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