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### Subject: Re: not using nullmove? [generalized null move]

Author: Dann Corbit

Date: 09:59:44 02/15/04

Go up one level in this thread

On February 15, 2004 at 12:35:12, Tord Romstad wrote:
>On February 14, 2004 at 20:15:58, Bruce Cleaver wrote:
>
>>"Why not use a logarithmic scale based on the difference between the best
>>possible move and the move under consideration?"
>>
>>Ron Rivest (he is the "R" in the RSA encryption algorithm) wrote a chess
>>algorithm called min-max approximation, which computes the first derivative
>>(really!!) of the score's change as a means to shape the search. It has
>>somewhat the same flavor as your idea.
>>
>>It is really beautiful, but has two flaws: it is a best-first searcher
>>(therefore exponential in memory), and heavily involves floating-point calcs.
>>The first objection can be overcome in the standard way, but not the second.
>
>Rivest's work sounds very interesting. Do you know where I can read more
>about it?
The very bottom of this page:
http://theory.lcs.mit.edu/~rivest/publications.html

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