Author: Vincent Diepeveen
Date: 06:46:49 05/11/02
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On May 11, 2002 at 05:48:17, Matthias Gemuh wrote: for attacktables, bitboards isn't the fastest thing. Bitboards is a tradeoff. You put less information into a single 64 bits word. So you can use instructions like AND and OR more easily. However to get attacktables you might want to look at gnuchess 4.0 (not 5.0 which was raped and rewritten to bitboards for some unknown reason). Gnuchess is putting more information into a single word for each square. The advantage is you can faster work with complex knowledge. The disadvantage is obviously a slowdown in speed because you use more knowledge. > >Hi Experts, >how much faster can I compute attacks when I rotate ? 5%? 20%? 50%? >I don't understand rotation and hope the gain is 1% speed boost :-). >Regards, >Matthias.
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