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Subject: Re: Speed vs board representation statistic

Author: Tom Kerrigan

Date: 23:35:55 02/12/00

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On February 12, 2000 at 22:19:46, Robert Hyatt wrote:

>On February 12, 2000 at 20:02:26, José Carlos wrote:
>
>>  Many things have been said about board representation (paticularly about
>>bitboards) and speed. I think it could be a nice idea (just for fun) to make an
>>statistic about what program use wich board representation and its aprox speed.
>>Could you post what b.r. do you use in your programs and aprox nps in midgame
>>(and the hardware used)?
>>  I know it strongly depends on the amount of knowledge implemented, but it
>>could be just an aproximation. And it's just for fun... :)
>>
>>  José C.
>
>
>This comparison is flawed, because there are two variables: board representation
>and chess engine concepts.  IE I can write a bitmap program, and a mailbox
>program, and make _either_ faster by choosing what I eval/don't eval, how I
>generate moves, etc.  IE the board representation is just _one_ issue that
>contributes to speed (NPS).

You're not telling Jose anything new here. In fact, you're repeating what he
said. Not helpful.

-Tom



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