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Subject: Re: Piece\square maps.

Author: Igor V. Korshunov

Date: 20:56:43 11/17/03

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On November 17, 2003 at 07:28:28, martin fierz wrote:

>On November 17, 2003 at 05:28:19, macaroni wrote:
>
>>What programs use this method for evuation? (perhaps varying it at the start of
>>each search). At the moment my program uses this, and a bit of king safty done
>>in-search. Is it a viable method? or before I re-write my fairly bad SetMaps()
>>function, should I change the whole system?
>>cheers
>>tor
>
>piece-square-tables have the advantage that you have a really fast evaluation
>thanks to incremental eval updating.

I don't do PST incrementally. I have no complex evaluation.
An experiment:

Speed of my engine:
 - with PST                 -  749 kNp/s
 - without PST              -  753 kNp/s
 - only material evaluation - 1083 kNp/s

PST is very small part of simple evaluator.
Do you still think that incremental updates of PST is able to make your program
faster?


 i'm certain that a good
>evaluation will do better than PST.

Of course, good evaluation is better than bad. But can you offer something to
replace PST?




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