Author: Vincent Diepeveen
Date: 07:24:40 12/10/01
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On December 10, 2001 at 10:21:08, Bas Hamstra wrote: >On December 10, 2001 at 10:16:25, Vincent Diepeveen wrote: > >>On December 10, 2001 at 08:05:42, Vincent Diepeveen wrote: >> >>>On December 10, 2001 at 06:02:46, Bas Hamstra wrote: >>> >>>>On December 10, 2001 at 04:13:05, Andrew Dados wrote: >>>> >>>>>On December 10, 2001 at 03:40:53, Russell Reagan wrote: >>>>> >>>>>>At http://www.ast.cam.ac.uk/~cmf/chess/theory.html it says: >>>>>> >>>>>>"Most top chess programs these days use bitboards." >>>>>> >>>>>>Is this true? >>>>> >>>>>No. The opposite is true. >>>>> >>>>>non bitboard programs: >>>>>commercial: tiger, fritz, junior, diep, rebel, genius, nimzo >>>>>amateur: most >>>>>ferret non-bitboard, too. >>>>> >>>>>bitboard programs: afik none commercial. crafty, insomniac and few more. >>>>> >>>>>then to some extend all programs may use bitboards especially to carry around >>>>>pawn structure info. >>>>> >>>>>-Andrew- >>>> >>>>Correction: Fritz uses bitboards. Non rotated. >>>> >>>>Bas. >>> >>>No it doesn't. >> >>Correction, i got email from Frans his official statement nowadays >>is that he IS using bitboards. > >Not only that, but he even claims BB datastructure is not slower. Quite >something from mr. efficiency, eh? > >Bas. I wonder why Fritz is slower on the K7 than on the P3. On my paper bitboards should be much faster on K7 as you can do BSF/BSR to a 64 bits register without branch mispredictions, and i don't see how to do that on the P3. Best regards, Vincent
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