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Subject: Re: extending the horizon

Author: Uri Blass

Date: 06:22:20 10/21/03

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On October 21, 2003 at 09:09:48, Earl Fuller wrote:

>With the new AMD 64 bit CPU having been released, it begs another question !
>Will it be possible to extend the search horizon so the chess programs can see
>deeper into the game, in the same amount of time ?

even the optimistic predicitions do not predict that program can be more than
twice faster thanks to 64 bit when every year or every 18 months the hardware
get twice faster so the answer is simply no.

It may be possible to search deeper mainly thanks to better algorithms and
better hardware.

I do not see 64 bits as something important.



  Interesting, don't you
>think!
>Because i am not a chess programmer perhaps this question may seem naive to
>those of you who are !  However having said that, it's always been my
>understanding that speed and memory were a key factor into how far a chess
>program can see ahead!

No

Extensions and pruning and order of moves are the key factors.

speed can only give linear improvement when extensions pruning and better order
of moves can give exponential improvement(It is better to be 1.1^n times faster
when the program searches n plies and not twice faster at every depth).


Uri



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