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Subject: Re: Hi, I have a question about Aspiration Search and PVS

Author: Ricardo Gibert

Date: 02:11:58 04/07/03

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On April 06, 2003 at 18:30:29, Igor Polyakov wrote:

>In aspiration search, the "estimated" values for Alpha and Beta, are they aimed
>to cause cut-offs in the very first part of the tree without having to generate
>Alpha and Beta values by evaluating the branch completely? Can you please
>provide a very detailed response? I am kind of confused on WHY it's an
>improvement since I only see improvement in one branch with the risk of doing
>re-searches.
>
>About PVS and null windows...how do null windows cause more cut-offs? I would
>really appreciate if you pointed me to a very good website with detailed
>explanation, and a lot of pictures, etc. I kind of don't get it.
>
>Thank you for your time.

This might help:
http://www.brucemo.com/compchess/programming/index.htm



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