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Subject: Re: Null move question

Author: Sune Fischer

Date: 12:45:52 08/02/03

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On August 02, 2003 at 14:40:45, Dieter Buerssner wrote:

>On August 02, 2003 at 12:15:18, Sune Fischer wrote:
>
>>On August 02, 2003 at 11:12:29, Tony Werten wrote:
>>
>>>When not doing any extensions ( not realistic but anyway) the values returned
>>>from the last 2 plies from normal search are exact. (As was published 15 years
>>>ago)
>>
>>I don't believe that, and I think my example above shows it.
>
>A. Reinefeld. An Improvement of the Scout Tree Search Algorithm. ICCA Journal
>6,4 (1983), pp. 4-14. http://www.zib.de/reinefeld/bib/83icca.pdf

A bit long and technical to quickly go through tonight, but looks like he is
talking about minimax searching of some kind, and not alpha-beta.

-S.

>I think, it won't work in general with a qsearch (which is more or less variable
>depth by definition). It can work in specific cases (the easiest example: there
>are no captures, and no lazy eval is used).
>
>A modern alpha-bet search will use extensions, and this already makes Reinefelds
>algorithm unsuitable (at least without modifications).
>
>Regards,
>Dieter



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