• Blitz vs. prime cube action

    From Timothy Chow@21:1/5 to All on Tue Apr 4 08:54:55 2023
    XGID=aDBCB-B----a---aA-bcbcbA--:1:1:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | O X O | | O O O O X |
    | O | | O O O O |
    | | | O O |
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | | X |
    | | | X X | +---+
    | | | X X X X X | | 2 |
    | O | | X X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 76 O: 109 X-O: 0-0
    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 Thu Apr 6 08:42:23 2023
    XGID=aDBCB-B----a---aA-bcbcbA--:1:1:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | O X O | | O O O O X |
    | O | | O O O O |
    | | | O O |
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | | X |
    | | | X X | +---+
    | | | X X X X X | | 2 |
    | O | | X X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 76 O: 109 X-O: 0-0
    Cube: 2, X own cube
    X on roll, cube action

    The two blots in the outfield mean that O loses a lot of gammons.
    I thought this looked like a pass, but XG says it's a clear take.
    If we rearrange X's dead checkers a little more favorably, as in
    the variant below, we can make XG pass.

    Analyzed in Rollout
    No redouble
    Player Winning Chances: 64.36% (G:31.76% B:0.50%)
    Opponent Winning Chances: 35.64% (G:4.47% B:0.14%)
    Redouble/Take
    Player Winning Chances: 64.54% (G:31.75% B:0.49%)
    Opponent Winning Chances: 35.46% (G:4.60% B:0.14%)

    Cubeful Equities:
    No redouble: +0.705 (-0.192)
    Redouble/Take: +0.897
    Redouble/Pass: +1.000 (+0.103)

    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: ± 0.006 (+0.699..+0.711)
    Confidence Double: ± 0.012 (+0.885..+0.908)

    eXtreme Gammon Version: 2.19.211.pre-release

    -------
    Variant
    -------

    XGID=aCCBC-B----a---aA-bcbcbA--:1:1:1:00:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | O X O | | O O O O X |
    | O | | O O O O |
    | | | O O |
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | | |
    | | | X X X | +---+
    | | | X X X X X | | 2 |
    | O | | X X X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 78 O: 109 X-O: 0-0
    Cube: 2, X own cube
    X on roll, cube action

    Analyzed in Rollout
    No redouble
    Player Winning Chances: 65.77% (G:33.32% B:0.63%)
    Opponent Winning Chances: 34.23% (G:4.15% B:0.13%)
    Redouble/Take
    Player Winning Chances: 66.13% (G:33.13% B:0.61%)
    Opponent Winning Chances: 33.87% (G:4.33% B:0.14%)

    Cubeful Equities:
    No redouble: +0.750 (-0.250)
    Redouble/Take: +1.000 (+0.000)
    Redouble/Pass: +1.000

    Best Cube action: Redouble / Pass

    Rollout:
    2592 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller
    Confidence No Double: ± 0.006 (+0.744..+0.756)
    Confidence Double: ± 0.009 (+0.991..+1.009)

    eXtreme Gammon Version: 2.19.211.pre-release

    ---
    Tim Chow

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