• Stay back or not?

    From Tim Chow@21:1/5 to All on Thu Nov 25 14:10:19 2021
    XGID=--BBBBC-A------c-cBdb-Aab-:1:1:1:61:0:0:0:0:10

    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 X | | O O X O O |
    | O O X | | O O O |
    | O O | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | | | X X X X X | | 2 |
    | X | | X X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 112 O: 92 X-O: 0-0
    Cube: 2, X own cube
    X to play 61

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tim Chow@21:1/5 to All on Sat Nov 27 10:46:05 2021
    XGID=--BBBBC-A------c-cBdb-Aab-:1:1:1:61:0:0:0:0:10

    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 X | | O O X O O |
    | O O X | | O O O |
    | O O | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X | +---+
    | | | X X X X X | | 2 |
    | X | | X X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 112 O: 92 X-O: 0-0
    Cube: 2, X own cube
    X to play 61

    OTB, I judged that 8/1 was the DMP play, and I figured that my strong
    board and O's somewhat awkward structure meant that I wouldn't lose
    too many gammons. According to XG, however, 22/16 along with 8/7
    or 6/5 wins about as many games as 8/1 and loses significantly fewer
    gammons.

    1. Rollout¹ 22/16 6/5 eq:-0.502
    Player: 21.84% (G:0.22% B:0.00%)
    Opponent: 78.16% (G:0.53% B:0.00%)
    Confidence: ±0.004 (-0.506..-0.498) - [69.5%]

    2. Rollout¹ 22/16 8/7 eq:-0.503 (-0.001)
    Player: 21.81% (G:0.24% B:0.00%)
    Opponent: 78.19% (G:0.52% B:0.01%)
    Confidence: ±0.004 (-0.507..-0.500) - [30.5%]

    3. Rollout¹ 22/16 5/4 eq:-0.534 (-0.033)
    Player: 21.39% (G:0.56% B:0.01%)
    Opponent: 78.61% (G:3.12% B:0.10%)
    Confidence: ±0.004 (-0.538..-0.531) - [0.0%]

    4. Rollout¹ 22/16 2/1 eq:-0.538 (-0.036)
    Player: 21.39% (G:0.66% B:0.01%)
    Opponent: 78.61% (G:3.42% B:0.17%)
    Confidence: ±0.004 (-0.542..-0.534) - [0.0%]

    5. Rollout¹ 22/16 4/3 eq:-0.544 (-0.042)
    Player: 20.98% (G:0.68% B:0.02%)
    Opponent: 79.02% (G:3.27% B:0.09%)
    Confidence: ±0.004 (-0.548..-0.540) - [0.0%]

    6. Rollout¹ 22/16 3/2 eq:-0.545 (-0.043)
    Player: 20.93% (G:0.62% B:0.01%)
    Opponent: 79.07% (G:3.30% B:0.12%)
    Confidence: ±0.004 (-0.549..-0.541) - [0.0%]

    7. Rollout¹ 8/1 eq:-0.562 (-0.060)
    Player: 22.01% (G:1.02% B:0.02%)
    Opponent: 77.99% (G:7.10% B:0.06%)
    Confidence: ±0.004 (-0.566..-0.558) - [0.0%]

    8. Rollout¹ 8/2 6/5 eq:-0.566 (-0.064)
    Player: 21.89% (G:0.94% B:0.02%)
    Opponent: 78.11% (G:7.19% B:0.06%)
    Confidence: ±0.004 (-0.570..-0.561) - [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)