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Re: [Bug-gnubg] Incorrect equities calculated
From: |
Joern Thyssen |
Subject: |
Re: [Bug-gnubg] Incorrect equities calculated |
Date: |
Thu, 7 Aug 2003 19:54:27 +0000 |
User-agent: |
Mutt/1.4.1i |
On Thu, Aug 07, 2003 at 03:16:48PM -0400, Jim Blue wrote
> In the saved position below, the equities at 2-ply and roll-out are
> reasonable, in the neigherborhood of -.5, but at 3-ply they all come
> out to be -1. (I set up this position by editing it, not in the course
> of a game, in case that matters.)
Your rollout is a _cubeless_ one, hence the equities around -0.5.
I get:
1. Cubeful 2-ply 9/8 7/2 Eq.: -0.924
0.270 0.015 0.000 - 0.730 0.020 0.000
2-ply cubeful 100% speed [world class]
2. Cubeful 2-ply 7/2 4/3 Eq.: -0.932 ( -0.009)
0.269 0.015 0.000 - 0.731 0.020 0.000
2-ply cubeful 100% speed [world class]
Note that this it's very close to a pass after either move. At 3-ply I
get:
1. Cubeful 3-ply 9/8 7/2 Eq.: -1.000
0.254 0.013 0.000 - 0.746 0.027 0.001
3-ply cubeful [grandmaster]
2. Cubeful 3-ply 7/2 4/3 Eq.: -1.000 ( +0.000)
0.254 0.013 0.000 - 0.746 0.027 0.000
3-ply cubeful [grandmaster]
The 1.5% drop in gwc is just enough to make this a pass. Remember that
the take point at -3,-3 is between 25% and 30%.
Jørn
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