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Subject: Re: SEE for forward pruning in Q. Search

Author: Robert Hyatt

Date: 17:41:50 08/09/99

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On August 09, 1999 at 17:51:01, Tom King wrote:

>On August 08, 1999 at 21:35:46, Robert Hyatt wrote:
>
>[snip]
>>
>>
>>I've been doing a 'hybrid' for nearly a year...  R=3 fairly close to the
>>root, R=2 beyond some threshold that I don't remember what it is...
>>
>>
>
>Interesting.. better than pure R=2 or pure R=3? I did some experiments a while
>back, using R=3 on the opponent's move, and R=2 on the computers move (idea
>being - let's not cover up the opponent's threats, and if we miss some of our
>threats, well, so be it). But it was more or less a 'wash'.


I started playing with this after Paris, as someone said that Frans (or someone)
was fiddling around with R=3.  Bruce and I played a few games one night with
Ferret vs Crafty, with bruce using R=3, and we saw _no_ gross mistakes on his
part.  In fact, we couldn't tell the difference (at least R=3 was not making
mistakes that R=2 wasn't).

But I never felt comfortable with raw R=3, as R=2 causes more than enough
problems already, thank you very much.  :)

Ernst is writting an ICCA paper describing some experiments he did with this
(totally unconnected with my tests).  Wait for his paper to hit the journal as
he has some good data...  And I am not yet sure that this is a good idea, but I
have been running it a good while and it has been in the distributed Crafty for
quite a while as well and no one has complained.  Of course, now that everyone
knows, look out.  :)



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