• Yet another double 5s

    From Timothy Chow@21:1/5 to All on Wed Mar 1 08:45:54 2023
    I thought I posted this one a couple of days ago, but I
    guess maybe I forget to hit "send".

    XGID=---a-BCBB-A-bBa--bbbcB-bA-:1:1:1:55:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X O X |
    | X O O | | O O X O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | O X X | | X X | | 2 |
    | O X X X | | X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 160 O: 120 X-O: 0-0
    Cube: 2, X own cube
    X to play 55

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Robert Zimmerman@21:1/5 to Timothy Chow on Wed Mar 1 10:17:14 2023
    On Wednesday, March 1, 2023 at 8:45:55 AM UTC-5, Timothy Chow wrote:
    I thought I posted this one a couple of days ago, but I
    guess maybe I forget to hit "send".

    XGID=---a-BCBB-A-bBa--bbbcB-bA-:1:1:1:55:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X O X |
    | X O O | | O O X O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | O X X | | X X | | 2 |
    | O X X X | | X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 160 O: 120 X-O: 0-0
    Cube: 2, X own cube
    X to play 55

    ---
    Tim Chow

    I would take advantage of the opportunity to safely escape the anchor checkers and plan to plant them on the 16 point until the back checker can reach them. The back checker isn't in much trouble at the moment. I'd point on O's back checker to slow its
    escape and hope to blitz with the 10 available checkers plus 2 more coming from the midpoint. The race gave me pause with breaking the anchor, but we'll only be down 20 after the play.

    21/16(2) 8/3(2)

    Bob

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  • From Timothy Chow@21:1/5 to All on Fri Mar 3 23:44:00 2023
    I posted this one already, but in the wrong thread, so I'm re-posting
    it here.

    XGID=---a-BCBB-A-bBa--bbbcB-bA-:1:1:1:55:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X O X |
    | X O O | | O O X O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | O X X | | X X | | 2 |
    | O X X X | | X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 160 O: 120 X-O: 0-0
    Cube: 2, X own cube
    X to play 55

    Like Bob, I played 21/16(2), 8/3*(2). But X is still way behind in the
    pip count after this roll, and 21/16(2) somewhat strands his straggler.
    See the variant below for comparison.

    1. Rollout¹ 13/3*(2) eq:+0.294
    Player: 52.75% (G:14.82% B:0.49%)
    Opponent: 47.25% (G:12.19% B:0.61%)
    Confidence: ±0.010 (+0.283..+0.304) - [100.0%]

    2. Rollout¹ 21/16(2) 8/3*(2) eq:+0.181 (-0.113)
    Player: 50.58% (G:15.47% B:0.66%)
    Opponent: 49.42% (G:18.00% B:0.74%)
    Confidence: ±0.010 (+0.171..+0.190) - [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=---a-BCBB-A-bCa--bbbcB-b--:1:1:1:55:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X O |
    | X O O | | O O X O |
    | X | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | O X X | | X X | | 2 |
    | O X X X | | X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 149 O: 120 X-O: 0-0
    Cube: 2, X own cube
    X to play 55

    1. Rollout¹ 21/16(2) 8/3*(2) eq:+0.595
    Player: 62.57% (G:13.59% B:0.39%)
    Opponent: 37.43% (G:7.39% B:0.23%)
    Confidence: ±0.007 (+0.587..+0.602) - [100.0%]

    2. Rollout¹ 13/3*(2) eq:+0.566 (-0.029)
    Player: 61.69% (G:16.07% B:0.46%)
    Opponent: 38.31% (G:7.91% B:0.28%)
    Confidence: ±0.014 (+0.552..+0.580) - [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

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