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Re: [Bug-gnubg] Predefined move filters
From: |
Gary Wong |
Subject: |
Re: [Bug-gnubg] Predefined move filters |
Date: |
Mon, 30 Dec 2002 16:24:12 -0500 |
User-agent: |
Mutt/1.3.28i |
On Mon, Dec 30, 2002 at 08:49:35PM +0000, Joern Thyssen wrote:
> Correct. Using 1-ply may often remove the correct move, so that's why we
> generally skip pruning at odd plies.
>
> The old setup has a setting "Skip pruning at 1-ply" or something similar
> for the same reason.
I'm not really convinved about this. The old "skip 1-ply pruning" did
improve evaluations, at the cost of being slower -- if you turned it
on, instead of getting (say) all moves eval'ed at 0-ply, and the best
16 of those at 1-ply, and the best 8 of those at 2-ply, you got all at
0-ply and the best 16 at 2-ply. This is definitely better, but
roughly twice as slow.
I think that a better choice would have been to turn "skip 1-ply
pruning" _off_, and increase the number of candidates. That way, you
might get everything at 0-ply, the best 32 at 1-ply, and the best 16
of those at 2-ply -- I believe this is almost as fast as the choice of
filter above, and slightly stronger.
I think that including odd-ply evaluation in the filtering is a good
thing, as long as the parameters are set intelligently. (I have no
idea what the most intelligent set of parameters are, of course :-)
Cheers,
Gary.
--
Gary Wong address@hidden http://www.cs.arizona.edu/~gary/
- Re: [Bug-gnubg] Predefined move filters, (continued)
- Re: [Bug-gnubg] Predefined move filters, Joern Thyssen, 2002/12/30
- RE: [Bug-gnubg] Predefined move filters, Albert Silver, 2002/12/30
- Re: [Bug-gnubg] Predefined move filters, Joseph Heled, 2002/12/30
- Re: [Bug-gnubg] Predefined move filters, Gary Wong, 2002/12/30
- Re: [Bug-gnubg] Predefined move filters, Joseph Heled, 2002/12/30
- Re: [Bug-gnubg] Predefined move filters, Gary Wong, 2002/12/30
- Re: [Bug-gnubg] Predefined move filters, ershaw, 2002/12/31
- Re: [Bug-gnubg] Predefined move filters, Gary Wong, 2002/12/31
- Re: [Bug-gnubg] Predefined move filters, Joseph Heled, 2002/12/31
- Re: [Bug-gnubg] Predefined move filters, Gary Wong, 2002/12/31
Re: [Bug-gnubg] Predefined move filters,
Gary Wong <=
Re: [Bug-gnubg] Predefined move filters, Joseph Heled, 2002/12/30