Author: pavel
Date: 12:04:14 05/11/02
Go up one level in this thread
On May 11, 2002 at 09:46:49, Vincent Diepeveen wrote: >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. So in short it means, bitboard helps put more information (==more knowledge)in a single square (64 bits?), if that is what I understand. I dont know shit about bitboards, if I am not wrong there was an article by Bob on bitboard (or was it on bitboard rotation?), any idea where I can get hold of it? pavs > > > >> >>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.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.