Author: Walter Faxon
Date: 22:30:18 12/28/05
Go up one level in this thread
On December 28, 2005 at 16:49:52, Maurizio Monge wrote:
>>Vasik Rajlich (Rybka) wrote in posts here that he is using (1) unusual search
>>methods and (2) some older methods (maybe not search) that have been abandoned
>>by the mainstream CC community. (I'm too lazy to find these posts right now.)
>>
>
>Had Vasik told what those methods where? I'd like to know if it was some sort of
>asymmetrical search (conspiracy?), as i had a lot of interest in studing how it
>works and if it could be applied in chess programs...
>
>Thanks
>Maurizio
Vas did indeed mention Conspiracy Number Search in one of his posts here...
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http://hornid.com/cgi-bin/ccc/topic_show.pl?pid=450754#pid450754
Re: To author of Rybka
By Vasik Rajlich Date 2005-12-17 07:14
On December 16, 2005 at 14:30:29, adam wilks wrote:
>Hello,>>When at MIT studying computer science did you write a thesis on
computer chess ?>>regards
Nope. But McAllester was my thesis advisor (in a totally different topic), the
same year ('93) that his conspiracy numbers paper was published. Strange
coincidence ..Vas
---------------
...but I don't know if he is using it. For some reason there is a history of
misdirection on this topic. IIRC, some microcomputer program authors in the
80's dropped hints that they were using conspiracy numbers, at least near
evaluation endpoints; I think Kittinger used the term "nodulations". But there
is nothing in the open literature supporting this and later academic authors
came to the conclusion that conspiracy numbers didn't really work for chess.
David McAllester and Deniz Yuret finally published their revised work
(Alpha-Beta-Conspiracy Search. ICGA Journal, Vol. 25, No. 1 (March 2002),
pp.16-35), nearly ten years after their initial experiments with the
multiprocessor program Star-Socrates. I mentioned all this in an old post
lamenting the lack of recent published work on different search paradigms:
http://hornid.com/cgi-bin/ccc/topic_show.pl?pid=286391#pid286391
If you can get any variety of conspiracy numbers to work for chess, please
publish your results! You can post your preliminary experiments here! :)
-Walter
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