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Subject: Re: Bitboard engines

Author: Russell Reagan

Date: 01:17:12 08/03/02

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On August 03, 2002 at 03:15:05, Joost Buijs wrote:

>Don't forget Galahad, it uses bitboards and comes with full C++ sourcecode.
>Also my own engine Nightmare uses rotated bitboards, this is a private engine
>but i am willing to send you the sourcecode of the bitboard part.
>
>Joost

If you are willing, I would like to see what kinds of bitboards you use in your
board representation. For example, most engines have bitboards for:

all pieces
white pieces
black pieces
white/black pawns, knights, bishops, rooks, queens, and king
then some rotated bitboards

That seems to be the "standard" method, but some engines have extra bitboards or
different ones entirely. Most use an offset based board with their bitboards
too. I don't recall off the top of my head if there are any engines that use
bitboard exclusively. Surely there is.

I am currently doing some tests between different board representations, so I'm
fiddling with different ideas, so if you wouldn't mind showing me your board
representation, I'd appreciate it.

Thanks,
Russell




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