• Damn the torpedoes?

    From Timothy Chow@21:1/5 to All on Sat Mar 12 17:13:26 2022
    If you don't recognize the subject line:

    https://en.wikipedia.org/wiki/Battle_of_Mobile_Bay#%22Damn_the_torpedoes%22


    XGID=-A-BCaC-Baaa----bbbcbBAA--:2:1:1:63:0:0:0:0:10

    X:Player 1 O:Player 2
    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 X X X |
    | O O O | | O O X |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | X | | X X X | | 4 |
    | O O O X | | X O X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 140 O: 141 X-O: 0-0
    Cube: 4, X own cube
    X to play 63

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Mar 14 08:30:17 2022
    XGID=-A-BCaC-Baaa----bbbcbBAA--:2:1:1:63:0:0:0:0:10

    X:Player 1 O:Player 2
    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 X X X |
    | O O O | | O O X |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | X | | X X X | | 4 |
    | O O O X | | X O X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 140 O: 141 X-O: 0-0
    Cube: 4, X own cube
    X to play 63

    The "safe" play is 8/2 4/1, but it's not really safe, and it does not
    have much of an upside. However, even if you reject 8/2 4/1, there
    are several bold plays to choose from. They all have a similar downside
    so it makes sense to pick the play with the biggest upside, and that is
    21/15 8/5*.

    1. Rollout¹ 21/15 8/5* eq:-0.822
    Player: 21.07% (G:7.29% B:0.49%)
    Opponent: 78.93% (G:35.81% B:3.95%)
    Confidence: ±0.013 (-0.835..-0.809) - [100.0%]

    2. Rollout¹ 8/2 8/5* eq:-0.925 (-0.103)
    Player: 16.35% (G:3.56% B:0.16%)
    Opponent: 83.65% (G:33.20% B:1.44%)
    Confidence: ±0.009 (-0.934..-0.916) - [0.0%]

    3. Rollout¹ 8/2 4/1 eq:-0.932 (-0.110)
    Player: 14.49% (G:1.66% B:0.03%)
    Opponent: 85.51% (G:28.00% B:1.04%)
    Confidence: ±0.008 (-0.939..-0.924) - [0.0%]

    4. Rollout¹ 21/12 eq:-0.937 (-0.115)
    Player: 15.31% (G:2.56% B:0.16%)
    Opponent: 84.69% (G:29.79% B:2.41%)
    Confidence: ±0.008 (-0.946..-0.929) - [0.0%]

    5. Rollout¹ 21/15 4/1 eq:-0.948 (-0.126)
    Player: 14.82% (G:3.23% B:0.16%)
    Opponent: 85.18% (G:30.60% B:2.05%)
    Confidence: ±0.008 (-0.956..-0.940) - [0.0%]

    6. Rollout¹ 8/2 6/3 eq:-0.953 (-0.131)
    Player: 14.08% (G:1.48% B:0.02%)
    Opponent: 85.92% (G:28.71% B:1.14%)
    Confidence: ±0.008 (-0.961..-0.946) - [0.0%]

    ¹ 1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller

    eXtreme Gammon Version: 2.19.207.pre-release

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Sat May 6 12:48:30 2023
    XGID=-B-BBaC-Da--b---b-bcbbB---:0:0:1:61:0:0:0:0:10

    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 X |
    | O O | | O O O X |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | X | | |
    | X | | X |
    | O X | | X X X X |
    | O O X | | X O X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 110 O: 130 X-O: 0-0
    Cube: 1
    X to play 61

    ---
    Tim Chow

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