Author: Sune Fischer
Date: 05:36:15 01/28/02
Hi, I'm in the process of rewriting my entire movegen, now I'm going to need bitboards I've decided, but it seems there are different approaches. I found this link (it was actually dead, but google had it cached so I put it up for a short while) http://www.fys.ku.dk/~fischer/Temp/New%20Technology.htm It is about reversed bitboards, the author claims it is faster than rotated: "When taking account of memory latencies, calculating the piece attacks using the forward and reverse bitboards can be done significantly faster due to total independence on lookup tables and complex calculations. There are a few slight snags with the diagonal calculations, but they are minor." His description ("significantly faster") entrigues me (hehe) but I can't find anything else on reversed bitboards and I've never heard of them before. What's the catch, is there something he is not telling? -S.
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