• I don't have good enough Isight to know the cube action here.

    From Axel Reichert@21:1/5 to [email protected] on Tue Aug 3 19:04:19 2021
    "[email protected]" <[email protected]> writes:

    XGID=--CBCB-------------cabb-a-:3:1:1:00:1:49:3:0:10
    X:Daniel O:eXtremeGammon

    Score is X:1 O:49. Unlimited Game, Jacoby Beaver
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | | | O O O O O |
    | | | O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | | | X X X X | | 8 |
    | | | X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 34 O: 38 X-O: 1-49
    Cube: 8, X own cube
    X on roll, cube action

    Adjustments for X:

    1 for vacant point 6
    1 for 3rd checker on point 2
    1 for additional checker on board

    No adjustments for O.

    So we have 37 versus 38.

    According to my Isight formula we have X's winning chances as

    80 - 37/3 + 2*(38-37) = 69.7 %

    Since 68 < 69.7 < 70 < 76 we would have an initial double, but no
    redouble and a clear take.

    GNU Backgammon's rollout gives 69.8 %. A redouble loses 14 millipoints
    of equity.

    Axel

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