• Boxcars again

    From Timothy Chow@21:1/5 to All on Wed Nov 8 09:22:43 2023
    XGID=---b-BE-B---dD---d-da--AA-:0:0:1:66:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O X X |
    | X O | | O |
    | X O | | O |
    | X O | | O |
    | | | |
    | |BAR| |
    | | | X |
    | O | | X |
    | O | | X |
    | O X | | X X O |
    | O X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 157 X-O: 0-0
    Cube: 1
    X to play 66

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Fri Nov 10 10:07:56 2023
    XGID=---b-BE-B---dD---d-da--AA-:0:0:1:66:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O X X |
    | X O | | O |
    | X O | | O |
    | X O | | O |
    | | | |
    | |BAR| |
    | | | X |
    | O | | X |
    | O | | X |
    | O X | | X X O |
    | O X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 157 X-O: 0-0
    Cube: 1
    X to play 66

    With two checkers still in O's home board, I didn't like giving up the
    midpoint here, and I tried 13/7(2) 8/2(2). But XG doesn't like that
    play. We still have good chances of making a five-prime, and our rear
    checkers are not yet in much danger of getting trapped. See the
    variant, in which O's anchor has been advanced one pip.

    1. Rollout¹ 13/7(4) eq:+0.088
    Player: 51.89% (G:14.43% B:0.56%)
    Opponent: 48.11% (G:11.43% B:0.38%)
    Confidence: ±0.012 (+0.075..+0.100) - [90.5%]

    2. Rollout¹ 24/18 13/7(3) eq:+0.075 (-0.013)
    Player: 52.14% (G:13.76% B:0.63%)
    Opponent: 47.86% (G:12.61% B:0.53%)
    Confidence: ±0.015 (+0.060..+0.090) - [9.5%]

    3. Rollout¹ 13/7(2) 8/2(2) eq:+0.006 (-0.082)
    Player: 49.89% (G:14.77% B:0.52%)
    Opponent: 50.11% (G:13.15% B:0.49%)
    Confidence: ±0.016 (-0.010..+0.022) - [0.0%]

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

    eXtreme Gammon Version: 2.19.211.pre-release

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

    XGID=----bBE-B---dD---d-da--AA-:0:0:1:66:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O X X |
    | X O | | O |
    | X O | | O |
    | X O | | O |
    | | | |
    | |BAR| |
    | | | X |
    | O | | X |
    | O | | X |
    | O X | | X X O |
    | O X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 155 X-O: 0-0
    Cube: 1
    X to play 66

    1. Rollout¹ 13/7(2) 8/2(2) eq:-0.037
    Player: 49.19% (G:13.11% B:0.37%)
    Opponent: 50.81% (G:12.94% B:0.45%)
    Confidence: ±0.013 (-0.050..-0.024) - [100.0%]

    2. Rollout¹ 13/1(2) eq:-0.083 (-0.046)
    Player: 47.93% (G:13.13% B:0.32%)
    Opponent: 52.07% (G:13.77% B:0.49%)
    Confidence: ±0.012 (-0.095..-0.071) - [0.0%]

    3. Rollout¹ 13/7(4) eq:-0.086 (-0.049)
    Player: 48.23% (G:12.16% B:0.44%)
    Opponent: 51.77% (G:12.05% B:0.40%)
    Confidence: ±0.013 (-0.100..-0.073) - [0.0%]

    4. Rollout¹ 24/18 13/7(3) eq:-0.121 (-0.084)
    Player: 47.70% (G:10.64% B:0.40%)
    Opponent: 52.30% (G:12.90% B:0.50%)
    Confidence: ±0.020 (-0.141..-0.100) - [0.0%]

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

    eXtreme Gammon Version: 2.19.211.pre-release

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From ah....Clem@21:1/5 to Timothy Chow on Fri Nov 10 16:50:44 2023
    On 11/8/2023 9:22 AM, Timothy Chow wrote:
    XGID=---b-BE-B---dD---d-d pa--AA-:0:0:1:66:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
     +13-14-15-16-17-18------19-20-21-22-23-24-+
     | X           O    |   | O  O        X  X |
     | X           O    |   | O                |
     | X           O    |   | O                |
     | X           O    |   | O                |
     |                  |   |                  |
     |                  |BAR|                  |
     |                  |   | X                |
     | O                |   | X                |
     | O                |   | X                |
     | O           X    |   | X  X     O       |
     | O           X    |   | X  X     O       |
     +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 155  O: 157 X-O: 0-0
    Cube: 1
    X to play 66


    These positions flummox me. Ahead in the race, I want to escape a
    runner, but if I do that I expose a blot on the 8 or 13. So I'll just
    make the 7 and the deuce points. Which is probably the obvious but
    wrong answer.

    --
    Ah....Clem
    The future is fun, the future is fair.

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