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Subject: Re: move ordering and node count

Author: Dan Andersson

Date: 11:42:09 03/29/04

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On March 29, 2004 at 14:25:13, Robert Hyatt wrote:

>On March 29, 2004 at 11:14:29, Dan Andersson wrote:
>
>> The Plaat paper concerns AB with memory. You won't get the half size tree by
>>100% perfect ordering. You must get the right cutoff moves also.
>>
>>MvH Dan Andersson
>
>
>I wasn't talking about the plaat paper at all.
>
>But the rest of your statement I don't follow.  If I have perfect move ordering,
>I will absolutely search the minimal tree space.  That is by definition, true...

 It is a truth with caveats. I refer you to Knuths 'Selected Papers on Analysis
of Algorithms', 'An Analysis of Alpha-Beta Pruning', Theorem 2 page 120.
 There is even a nice figure that shows an example.

MvH Dan Andersson



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