Author: Severi Salminen
Date: 11:52:07 01/15/02
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On January 15, 2002 at 09:00:37, David Rasmussen wrote: >On January 15, 2002 at 08:49:16, Severi Salminen wrote: > >> >>But then again, why not use the allready equally fast FirstBit()... >> >>Severi > >I have both a LastBit and a FirstBit for several reasons. First of all, if I >know there is a white passer on a file (because I store that in my pawn hash >table), but I don't know what square it is on, I can do >LastBit(pos.bitboard[WHITE][PAWN] & FileMask(file)). This can't be done with >FirstBit(). FirstBit() will be used equivalently for black passers, though. [snipped...] You were totally correct, but what I meant is that if there is only one 1-bit in a BitBoard, _then_ it doesn't matter which one (of my examples...) you use. Of course I agree with all what you said. Severi
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