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Subject: Re: root move ordering

Author: martin fierz

Date: 02:10:40 09/23/04

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On September 23, 2004 at 04:14:15, Tony Werten wrote:

>On September 23, 2004 at 04:10:18, martin fierz wrote:
>
>>[snip]
>>
>>>There is _no_ overhead.  It is done only at the root, once per iteration.  For a
>>>12 ply search, a total of 12 times.  That won't use measurable CPU time.  The
>>>point is that root move ordering is critical for efficiency..
>>
>>exactly how critical for efficiency would you believe it to be?
>
>Depends on the bestmove. If that is constant, it's less important than after a
>rootfaillow.
>
>Tony

ha! what kind of an answer is that :-)

seriously though: it's clear that there is some importance to it, but can
anybody quantify it? e.g. like this: "ordering root moves by size of subtrees
gains X elo compared to constant static ordering done at ply 1".

cheers
  martin



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