Author: Tom King
Date: 15:42:58 08/10/99
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On August 09, 1999 at 20:41:50, Robert Hyatt wrote: >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. :) One thing's for sure - I'm sure there's a lot more we could all be doing with the null move. Playing around with different values of R, depending on depth in the tree, alpha and beta etc. etc. I look forward to this paper. Ernst has been productive of late..I'm sure I'm not the only one to enjoy reading his articles. [even if his damn program does kill mine at the WCCC ;-)] Cheers, Tom.
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