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Subject: Re: Root Move Ordering

Author: David Rasmussen

Date: 05:51:26 01/15/02

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On January 15, 2002 at 08:45:21, Severi Salminen wrote:

>>Many people use node count (or time) to order root nodes, apart from always
>>ordering the pv move of last ply first, of course. This seem to work ok. But as
>>some people have suggested (Christophe, for one), this method isn't very much to
>>the point and might have unwanted sideeffects.
>
>How is it "not to the point" and what side effects he means? For me it works.
>
>Severi

It works for me too.

The phrases "not to the point" and "side effects" are mine, not Christophe's.
But he has expressed similar things.

When I said "not to the point", I meant that 'nodes used' is not a very direct
measure of the quality of a move, it's rather an indirect one. If I somehow
could get the score of each root move after an iteration, I would certainly use
that for ordering, but I can't since I use PVS.

I can't name any tangible side effects, I said it "might" have side effects.

/David



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