• 7-away/3-away recube action from the bar

    From Timothy Chow@21:1/5 to All on Wed Nov 30 07:47:00 2022
    Note that O has already borne off two checkers.


    XGID=---BBBBBB------A---b-AdafA:1:1:1:00:0:4:0:7:10

    Score is X:0 O:4 7 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X | | O X O O O | O
    | | | O O O | O
    | | | O O |
    | | | O O |
    | | X | 6 |
    | |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: 127 O: 32 X-O: 0-4/7
    Cube: 2, X own cube
    X on roll, cube action

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Fri Dec 2 08:47:47 2022
    XGID=---BBBBBB------A---b-AdafA:1:1:1:00:0:4:0:7:10

    Score is X:0 O:4 7 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X | | O X O O O | O
    | | | O O O | O
    | | | O O |
    | | | O O |
    | | X | 6 |
    | |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: 127 O: 32 X-O: 0-4/7
    Cube: 2, X own cube
    X on roll, cube action

    This is one of those scores where the trailer has a hair-trigger
    recube, especially when it's still possible to win a gammon. I
    could see that this would be a recube if O's two borne-off checkers
    were still on (say) her 1pt, but with no gammon wins, I wasn't sure,
    and I decided not to redouble to 4. But at this score, XG is going
    to say it's a redouble whenever the following conditions are satisfied:

    - You have a direct shot, and hitting it leaves you almost gin.
    - Your chances of losing a gammon are high if you miss.

    In particular, having some gammon winning chances is not required.

    Analyzed in Rollout
    No redouble
    Player Winning Chances: 41.12% (G:0.00% B:0.00%)
    Opponent Winning Chances: 58.88% (G:35.16% B:0.55%)
    Redouble/Take
    Player Winning Chances: 41.43% (G:0.00% B:0.00%)
    Opponent Winning Chances: 58.57% (G:41.07% B:0.22%)

    Cubeful Equities:
    No redouble: -0.287 (-0.169)
    Redouble/Take: -0.118
    Redouble/Pass: +1.000 (+1.118)

    Best Cube action: Redouble / Take

    Rollout:
    1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller
    Confidence No Double: ± 0.003 (-0.289..-0.284)
    Confidence Double: ± 0.003 (-0.121..-0.114)

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

    ---
    Tim Chow

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