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Subject: Re: a question to Tord about detecting threats in null move

Author: Anthony Cozzie

Date: 09:13:13 10/03/03

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On October 03, 2003 at 12:03:49, Uri Blass wrote:

>
>I can detect every big threat by adding a special search after making null move.
>
>For example if I like to detect threats of at least 2.2 pawns I can do
>val=-alphabeta(depth-4,-beta+219,-beta+220,...)
>
>if (val<=beta-220)
>threatmove[ply-1]=1;
>//ply-1 because I still did not undo the null move.

small error here: beta should be replaced by eval, or you will have massive
instability problems.

anthony

>I understood that you use the botvinik extension only after big threats so how
>do you detect big threats?
>
>Do you decide to detect only part of the threats or do you do additional search
>to detect all of them?
>
>Another question is about your order of moves.
>Do you start with the threat move in case of a big threat or do you start with
>good captures?
>
>Uri



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