Author: Matthew Hull
Date: 08:46:18 07/21/04
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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. I think there are related positions where crafty is vulnerable to attack on the kingside, and not only with the trojan horse -- positions similar to the Falcon-Crafty game where blacks pieces are all on the queen side and white has bishops, knights and queen ready to sac and pillage on the kingside. You hardly ever see the commercial progams walking into setups like that. But, I've not studied it enough to know to what extent the wide ICC book is to blame.
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