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Subject: Re: quiesce node explosion

Author: Volker Böhm

Date: 13:07:04 01/24/04

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On January 24, 2004 at 15:57:50, Mike Siler wrote:

>In an average middlegame position, around 80-85% of the nodes my program
>searches are quiesce nodes. I have a static exchange evaluator and I only search
>captures with SEE value > 0. It seems like other engines are always under 25%
>qnodes. What else should I be doing to reduce these numbers?
>
>Michael

What do you count as quiesce node? Do you count a totally quiet horizont
position a quiesce node? If yes, 80-85% is ok. Else you´ve got a bug.

To reduce nodes in quiesce:

1. if static-eval > beta -> finished
2. if static-eval + piece-to-hit + bonus < alpha -> prune.

that should be enough to reduce nodes to 25% if not searching "bad SEE hits"

P.S. search if SEE == 0 too

Greetings



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