• Some kind of late-game cube action

    From Timothy Chow@21:1/5 to All on Wed Mar 13 19:47:22 2024
    XGID=-AbEB-Fb----A------bbbbc--:0:0:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | | | O O O O O |
    | | | O O O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | 6 X |
    | | | X X |
    | | | X X |
    | O | | X X X O |
    | X O | | X X X O X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 72 O: 124 X-O: 0-0
    Cube: 1
    X on roll, cube action

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Thu Mar 21 22:44:47 2024
    XGID=-AbEB-Fb----A------bbbbc--:0:0:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | | | O O O O O |
    | | | O O O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | 6 X |
    | | | X X |
    | | | X X |
    | O | | X X X O |
    | X O | | X X X O X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 72 O: 124 X-O: 0-0
    Cube: 1
    X on roll, cube action

    I was at sea in this position, and passed, figuring that my winning
    chances were probably around 25%, and that I would lose a fair number
    of gammons as well. But XG says that I win about 30% of the time.
    X's inflexible board is helpful to O; see the variant below.

    Analyzed in Rollout
    No double
    Player Winning Chances: 69.58% (G:13.86% B:0.36%)
    Opponent Winning Chances: 30.42% (G:1.41% B:0.04%)
    Double/Take
    Player Winning Chances: 69.01% (G:13.89% B:0.30%)
    Opponent Winning Chances: 30.99% (G:1.39% B:0.03%)

    Cubeful Equities:
    No double: +0.639 (-0.140)
    Double/Take: +0.779
    Double/Pass: +1.000 (+0.221)

    Best Cube action: Double / Take

    Rollout:
    1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller
    Confidence No Double: ± 0.003 (+0.636..+0.642)
    Confidence Double: ± 0.011 (+0.768..+0.790)

    eXtreme Gammon Version: 2.19.211.pre-release

    -------
    Variant
    -------

    XGID=-AbEC-Eb----A------bbbbc--:0:0:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | | | O O O O O |
    | | | O O O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | X X |
    | | | X X |
    | | | X X X |
    | O | | X X X O |
    | X O | | X X X O X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 70 O: 124 X-O: 0-0
    Cube: 1
    X on roll, cube action

    Analyzed in Rollout
    No double
    Player Winning Chances: 73.92% (G:15.98% B:0.44%)
    Opponent Winning Chances: 26.08% (G:1.61% B:0.04%)
    Double/Take
    Player Winning Chances: 73.51% (G:16.18% B:0.49%)
    Opponent Winning Chances: 26.49% (G:1.59% B:0.04%)

    Cubeful Equities:
    No double: +0.674 (-0.326)
    Double/Take: +1.030 (+0.030)
    Double/Pass: +1.000

    Best Cube action: Double / Pass

    Rollout:
    1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller
    Confidence No Double: ± 0.004 (+0.669..+0.678)
    Confidence Double: ± 0.010 (+1.020..+1.040)

    eXtreme Gammon Version: 2.19.211.pre-release


    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)