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Subject: Re: strange Q search of Rebel

Author: Uri Blass

Date: 13:09:32 12/26/03

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On December 26, 2003 at 15:59:29, Tony Werten wrote:

>On December 25, 2003 at 06:29:31, rasjid chan wrote:
>
>Ed has a different structure in his search.
>
>Most people have:
>search
>{
>  evaluate
>  for all moves do
>    make move
>    call search
>    unmake move
>  next
>}
>
>Ed uses:
>search
>{
>  for all moves do
>    make move
>    evaluate
>    call search
>    unmake move
>  next
>}
>
>The different location of evaluate causes all the differences like <=alpha
>instead of >=beta  etc
>
>Tony

I do not understand.

How the fact that I evaluate at a different place make the difference?

Note that I also evaluate every node but I do not see how it changes alpha and
beta.

Uri



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