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Subject: Re: Anyone for an 'increasing expectation' heuristic?

Author: Will Singleton

Date: 16:25:01 05/02/99

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On May 02, 1999 at 14:14:44, Francis Monkman wrote:

>I got to thinking along the same old lines again -- regardless of whether
>winning moves can be shown to have advantage after whatever ply-depth the
>machine is capable of, isn't there a strong case for monitoring the changing
>expectations of a move at increasing ply-depths, so that something which, while
>it may not have 'caught up with' the favorite move chosen, may have revealed
>significant increases in expectation, and hence be particularly suited to
>further exploration, ie extension(s) to the search?
>
>Any ideas or feedback, or possibly a programmer willing to try? I coded a
>working engine (in 68000 assembler, from scratch), but can't afford the time to
>start again, nor would I 'put myself forward' as a candidate for the job.
>
>Francis Monkman

I think a well-used method for determining the order of root moves is to see how
long each takes, then sort (excluding the best move) based on longest time
taken.  So, I suppose you could look at the root order at each iteration, and
see if any moves have moved significantly up the list.  But I don't know about
extending on such information; in fact, I don't think that info is very
significant, other than for root ordering purposes.

Or do you have another method for determining epectations?

Will




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