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

Author: Uri Blass

Date: 09:03:49 10/03/03


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.


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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