Author: Sune Fischer
Date: 02:39:28 05/05/04
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> First you update the attack table with the move and then you generate only >legal moves based on the attack tables , right? What i do is update the attack >table and then generate "pseudo legal" moves,except king moves to an attacked >square. So our difference is you have a routine which calculates only legal >moves based on your attack tables. I don't see how that can speed up perft >immensely. It can't :) The speed up Uri gets in perft comes from not having to make the moves at the leaf. The moves are just generated and then counted and the makemove is saved. It doesn't have anything to do with attacktables, you can make a legal move generator that does this trick without attacktables. The "perft trick" is not really interesting IMO, because it's not how a chess program usually does things. -S. >daniel
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