Author: Robert Hyatt
Date: 17:46:01 07/21/04
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On July 21, 2004 at 15:27:16, Derek Paquette wrote: >On July 21, 2004 at 11:29:10, Robert Hyatt wrote: > >>On July 20, 2004 at 22:02:46, Derek Paquette wrote: >> >>>I saw bob talking briefly about this 'coding' >>>what exactly is it? >>> >>>does it sacrifice a pawn if it thinks that the person its playing is just going >>>for a draw? >>>how exactly does it work >>> >>>thanks in advance, >> >> >>The trojan horse attack is a generic position where the computer has castled >>(usually king-side) and the human has not. The human plays something like Ng5, >>the computer responds with h6 to drive it away. Rather than retreating, the >>human plays h4 and if the computer plays hxg5, the human plays hxg5 and has a >>terrific attack down the h-file. The trojan horse code in crafty simply gives a >>huge penalty for taking the piece and opening the file, to avoid the problem >>completely. > >ah thank you very much, however I believe I asked the wrong question >there is 'talk' that Crafty has special code for dealing with a pawnwall that >humans sometimes setup, I'm not quite sure what that means. Older versions did detect the Stonewall type patterns but that was removed fairly recently as not necessary any longer. > >could you talk a little about that code? >Do you feel Crafty is better than some commercial programs for fighting humans >(shredder especially) No idea, and I really don't have any idea how to test such a hypothesis either, since it is unlikely that Crafty and another commercial program could play an extended match against a common series of GM players... > >what is your experience on ICC with crafty vs humans? Crafty does well. Most IM/GM players comment that it is very difficult to reach blocked pawn positions, but then they often try to use the "anti-blocking" code against crafty, where it struggles to avoid blocked pawn structures, but compromises its position in other ways to accomplish that... >perhaps that could shed a bit of light on the crafty vs humans debate that is >going on, (if its the best to play GM's with) I would not personally join such a debate. The commercial programs seem to me to play very well. If there is any criticism of some of them, it is their tendency to reach completely static pawn structures where the human can take a nap while drawing easily. Stopping that involves its own risks, of course.
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