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Subject: Re: Different Board Techniques like 0x88

Author: Roman Hartmann

Date: 11:21:51 08/26/05

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On August 26, 2005 at 13:39:24, Robert Hyatt wrote:

>On August 26, 2005 at 08:26:45, Roman Hartmann wrote:
>
>>On August 26, 2005 at 07:52:31, Gopikrishna wrote:
>>
>>>I would like to know what other types of board techniques are there other than
>>>8x10 array type used in tscp, 0x88 used in gerbil and bitboards used in some
>>>programs. If possible the respective programs using it will also be fine.
>>>Thanks.
>>
>>10x12 array which was already proposed by Shannon. Minimax.c from Chrilly
>>Donninger uses also a 10x12 board representation and my own engine Roce as well.
>>
>>Roman
>
>
>I'd personally use 0x88 if I were using an array.  10x12 has some efficiency
>issues that 0x88 eliminates.  I used 10x12 in Cray Blitz, but for reasons
>dealing with pre-fetching squares on vector hardware...

Unfortunately I didn't knew that when I started. I learnt just recently how 0x88
works and I might switch to it if I ever find the time/motivation to start a new
move generator. It's hard to switch if you have something working which is
reasonable fast.

Roman



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