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Subject: Re: Something wrong with my futility pruning?

Author: Severi Salminen

Date: 09:12:47 12/06/00

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On December 06, 2000 at 06:33:51, Georg v. Zimmermann wrote:

>Hi,
>
>I think we need to see more of your code, to mee it is not clear what you are
>doing. After the continue; comes your recursive search() call ?


The continue goes to the next pseudo legal move and tries that. Below the
continue is the normal PVS search code.

>What if all moves get fpruned ? On a fprune node value needs to be at least
>material_balance+ futility_margin. You need to set that before the move
>generation part.

Oh, yes. That is true. Now if all moves get pruned, I'm probably returning
-INF+Ply which is probably very wrong...Thanks.

>I also don't understand "(I prune check now also...)". You
>shouldn't prune when in check at all...

No, I meant that i prune if _my_ move would cause a check. I don't prune if I'm
in check. I believe that one should not prune checking moves.

Severi



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