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From: | Joseph Heled |
Subject: | Re: [Bug-gnubg] Predefined move filters |
Date: | Tue, 31 Dec 2002 10:48:30 +1300 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2) Gecko/20021202 |
Albert Silver wrote:
I'll do some testing of this, but it's not always easy to see thedifference.
I would say almost impossible without use of something like the rollout benchmark. I never do any work in 3ply, so I have little idea what a good filter will be at this level, but it seems reasonable to assume it does not suffer from the 1ply syndrome, since it "sees" much more of the future.
Perhaps later I will try the 3ply with the benchmark, and only try to get some numbers on various 2-ply filters.
-Joseph One detail: It's true that the 1-ply is the worst (IMHO) ply
depth, however, in my experience, the 3-ply is definitely stronger than the 2-ply. This has been confirmed by numerous rollouts, as well as errors pointed out by Snowie. As a rule its evaluation is more precise, and it is able to find the correct moves many times that it might miss at 2 plies. This includes its chronic problems with bearoff against morethan 1 checker on the bar.
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