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Subject: Re: Diep fullwidth vs Deep Blue fullwidth

Author: Robert Hyatt

Date: 14:38:38 12/25/99

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On December 25, 1999 at 14:11:11, Dan Andersson wrote:

>On December 25, 1999 at 11:48:38, Robert Hyatt wrote:
>
>>On December 25, 1999 at 07:03:50, Dan Andersson wrote:
>>
>>>>Also remember I reported that they did a new modification to this extension
>>>>for DB-2...  if there was one singular move, they extended as in the JICCA
>>>>article.  If two moves were better than the rest, they extended each, but not
>>>>as much as when there was only one singular move...
>>>>
>>>
>>>Thats not all new btw.  When you mentioned it first I got a bit surprised as I
>>>had a test implementation of someting that sounded very similar. In my library
>>>of machine readable texts I then found my inspiration. There is a paper named:
>>>Alpha-Beta-Conspiracy Search (Draft of Oct. 20, 1993) by
>>>David A. McAllester & Deniz Yuret. Could be worth reading. They used two depths
>>>black/white.
>>>
>>>Regards Dan Andersson
>>
>>
>>I had read that.  However the 'conspiracy number search' isn't quite the same
>>thing.  The point there is to determine how many nodes (below some point in
>
>Ahem, you better read that paper again. 'Alpha-Beta-Conspiracy Search' is an
>implementation of Alpha-Beta search, not Conspiracy Number search. They then
>prove a similarity betwen ABC search and CN serch.

In that case, I will.  I might have the name confused with a pure CNS paper or
two that I have read within the last couple of years...

Bob



>
><IGNORETHIS>
>>the tree) much change their value before it affects something back up in the
>>tree.  The ideas are similar, but not exactly the same...
>>
>>And you are right, the CNS can be used to extend cases where if one move
>>changes, the tree above that position changes, or if it takes two moves to
>>change to back up a new score...  etc...
></IGNORETHIS>
>
>Regards Dan Andersson



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