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Subject: Re: Aspiration Window sizes

Author: Robert Hyatt

Date: 07:05:24 03/14/05

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On March 14, 2005 at 09:32:55, Renze Steenhuisen wrote:

>Hi all,
>
>can anyone tell me whether there has ever been a study on the actual needed
>aspiration window sizes? The only thing I am only reading is that "it is common
>knowledge" and "it is known" concerning Aspiration Windows. And Crafty is using
>0.40*PAWN_VALUE because it seemed to perform best. But is there actual data
>somewhere?
>
>Cheers!
>
>Renze


That is "actual data".  Take your program, and try different values, over a
large test set of positions.  Find the range that produces the greatest average
search depth for the test set.  It will vary for each program, since the
evaluation functions can produce wildly variable scores...



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