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Subject: Re: Instability thing...

Author: Sune Fischer

Date: 02:56:15 09/18/04

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On September 18, 2004 at 05:42:20, Richard Pijl wrote:

>As far as I can see there are two problems (I encountered both of them myself
>:-):
>- Even in a stable search you cannot set beta to the upperbound found. The
>upperbound is an inclusive bound, so the bound could be the real score. This
>problem is easily solved by setting beta=score+1;

Ah yes, inclusive as in '<=' :)

>- In an instable search, when you get a fail high on the adjusted bound, the
>returned score is seen as an exact score as it will be within the alpha-beta
>window. I don't think this problem is solved easily. Instead you'll have to
>research with the original a-b window. I'm not sure that is worth it.
>Richard.

Very tricky stuff.. :)

Thanks, I'll give it shot!
-S.



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