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[Bug-gnubg] rollout cube decision MONEY, cubeful equity


From: Robert-Jan Veldhuizen
Subject: [Bug-gnubg] rollout cube decision MONEY, cubeful equity
Date: Thu, 21 Aug 2003 02:52:41 +0200

See the example below.

It looks like GNUBG doesn't double the cubeful equity after double/take. This seems confusing to me, and also confuses the JSD report.

BTW Jacoby rule enforced.

    GNU Backgammon  Position ID: sGfMASjgc8wBIg
                    Match ID   : cAkGAAAAAAAA
    +24-23-22-21-20-19------18-17-16-15-14-13-+  O: Kit Woolsey
    | X        X  O  O |   |    O        O  X |  0 points
    |             O  O |   |    O        O  X |
    |                O |   |                X |
    |                O |   |                  |
    |                  |   |                  |
    |                  |BAR|                  |v (Cube: 1)
    |                X |   |                  |
    |                X |   |                  |
    |                X |   |    X           O |
    |                X |   |    X        X  O |  Rolled 41
    | O  O           X |   |    X        X  O |  0 points
    +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: GOL Readers


Cube analysis
Rollout cubeless equity  +0.6380
Cubeful equities:
1. No double            +0.9343
2. Double, pass         +1.0000  ( +0.0657)
3. Double, take         +0.4934  ( -0.4409)
Proper cube action: No double, take (87.0%)
Rollout details:
Centered 1-cube:
   64.26%  34.95%   5.62% -  35.74%   5.16%   0.13% CL  +0.6380 CF  +0.9343
 [  0.13%   0.09%   0.04% -   0.13%   0.04%   0.00% CL   0.0035 CF   0.0053]
Player Zorba owns 2-cube:
63.55% 34.22% 5.46% - 36.45% 4.95% 0.12% CL +1.2345 CF +0.4934 --> +0.9868 ? RJV [ 0.28% 0.22% 0.08% - 0.28% 0.10% 0.01% CL 0.0161 CF 0.0090] [0.0180] ? RJV
Truncated cubeful rollout (depth 6) with var.redn.
432 games, Mersenne Twister dice gen. with seed 1181281792 and quasi-random dice
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]


--
Robert-Jan (Zorba on FIBS)




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