• Gammon save

    From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Sun Dec 24 19:51:58 2023
    From Newsgroup: rec.games.backgammon

    XGID=----aaEBBAA-bB---d-bc-B-b-:0:0:1:31:1:0:1:2:10

    Score is X:1 O:0 2 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O X O |
    | X O | | O O X O |
    | O | | O |
    | O | | |
    | | | |
    | |BAR| |
    | | | X |
    | | | X |
    | | | X |
    | O X X | | X |
    | O X X X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 149 O: 128 X-O: 1-0/2 Crawford
    Cube: 1
    X to play 31

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Wed Dec 27 07:24:55 2023
    From Newsgroup: rec.games.backgammon

    XGID=----aaEBBAA-bB---d-bc-B-b-:0:0:1:31:1:0:1:2:10

    Score is X:1 O:0 2 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O X O |
    | X O | | O O X O |
    | O | | O |
    | O | | |
    | | | |
    | |BAR| |
    | | | X |
    | | | X |
    | | | X |
    | O X X | | X |
    | O X X X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 149 O: 128 X-O: 1-0/2 Crawford
    Cube: 1
    X to play 31

    At a normal score, XG plays 8/5* 6/5 as one might expect, even
    though it leaves three blots in the outfield. But 8/5* 6/5 loses
    more gammons than I expected, despite X's anchor.

    1. Rollout-| 10/9 6/3 eq:-0.288
    Player: 44.90% (G:9.64% B:0.93%)
    Opponent: 55.10% (G:9.30% B:0.82%)
    Confidence: -#0.006 (-0.294..-0.282) - [100.0%]

    2. Rollout-| 10/7 9/8 eq:-0.361 (-0.073)
    Player: 39.70% (G:7.08% B:0.51%)
    Opponent: 60.30% (G:7.72% B:0.27%)
    Confidence: -#0.005 (-0.366..-0.355) - [0.0%]

    3. Rollout-| 8/5* 6/5 eq:-0.364 (-0.076)
    Player: 49.62% (G:13.85% B:1.69%)
    Opponent: 50.38% (G:17.82% B:2.69%)
    Confidence: -#0.007 (-0.371..-0.357) - [0.0%]

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

    eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Tue Mar 5 03:13:58 2024
    From Newsgroup: rec.games.backgammon

    XGID=-a----E-C---bFa-bb-e-bA---:0:0:1:43:1:0:1:2:10

    Score is X:1 O:0 2 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X |
    | X O O | | O O |
    | X | | O |
    | X | | O |
    | 6 | | O |
    | |BAR| |
    | | | X |
    | | | X |
    | X | | X |
    | O X | | X |
    | O X | | X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 154 O: 133 X-O: 1-0/2 Crawford
    Cube: 1
    X to play 43

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Mon Mar 11 17:07:23 2024
    From Newsgroup: rec.games.backgammon

    XGID=-a----E-C---bFa-bb-e-bA---:0:0:1:43:1:0:1:2:10

    Score is X:1 O:0 2 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X |
    | X O O | | O O |
    | X | | O |
    | X | | O |
    | 6 | | O |
    | |BAR| |
    | | | X |
    | | | X |
    | X | | X |
    | O X | | X |
    | O X | | X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 154 O: 133 X-O: 1-0/2 Crawford
    Cube: 1
    X to play 43

    For money or DMP, 13/10 13/9 is a perfectly reasonable candidate play,
    but it exposes extra blots and loses a lot more gammons.

    1. Rollout-| 22/15 eq:-0.811
    Player: 30.95% (G:3.98% B:0.47%)
    Opponent: 69.05% (G:21.48% B:0.79%)
    Confidence: -#0.007 (-0.817..-0.804) - [100.0%]

    2. Rollout-| 13/10 13/9 eq:-0.930 (-0.119)
    Player: 33.98% (G:7.69% B:0.77%)
    Opponent: 66.02% (G:30.46% B:1.31%)
    Confidence: -#0.007 (-0.937..-0.922) - [0.0%]

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

    eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2