• Boy, is O's board blotty!

    From Timothy Chow@21:1/5 to All on Fri Jan 19 10:34:40 2024
    XGID=-a--BCDB-b---B----Baeabba-:1:1:1:42:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X X | | O O O O O O |
    | X X | | O O O |
    | | | O |
    | | | O |
    | | | O |
    | |BAR| |
    | | | |
    | | | X |
    | | | X X | +---+
    | O X | | X X X | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 123 O: 102 X-O: 0-0
    Cube: 2, X own cube
    X to play 42

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Jan 22 09:37:57 2024
    XGID=-a--BCDB-b---B----Baeabba-:1:1:1:42:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X X | | O O O O O O |
    | X X | | O O O |
    | | | O |
    | | | O |
    | | | O |
    | |BAR| |
    | | | |
    | | | X |
    | | | X X | +---+
    | O X | | X X X | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 123 O: 102 X-O: 0-0
    Cube: 2, X own cube
    X to play 42

    In the vast majority of checker-play problems that I post here, the
    top play of the rollout is far ahead of the competitors (unless there
    are two or more plays that are obviously very similar to each other).
    This position is an exception, in that the second play of 18/14 6/4 is
    not that far behind the top play of 7/3 5/3. But the main reason I'm
    posting this is that OTB, I played 6/4 5/1*, hoping for a blitz. The
    trouble is that the position is not particular conducive to a blitz.
    X really wants to *contain* O's checker, and hitting is not the only
    way to achieve that. Playing 7/3 5/3 makes a four-point board and
    threatens to make a very strong five-prime. O's blotty board means
    that her sixes aren't as effective as they might otherwise be.

    1. Rollout¹ 7/3 5/3 eq:+0.829
    Player: 69.65% (G:22.97% B:1.02%)
    Opponent: 30.35% (G:9.45% B:0.09%)
    Confidence: ±0.010 (+0.819..+0.839) - [99.9%]

    2. Rollout¹ 18/14 6/4 eq:+0.806 (-0.023)
    Player: 69.37% (G:22.71% B:2.28%)
    Opponent: 30.63% (G:9.36% B:0.15%)
    Confidence: ±0.010 (+0.796..+0.816) - [0.1%]

    3. Rollout¹ 13/7 eq:+0.727 (-0.102)
    Player: 66.94% (G:20.34% B:1.65%)
    Opponent: 33.06% (G:7.96% B:0.10%)
    Confidence: ±0.012 (+0.715..+0.739) - [0.0%]

    4. Rollout¹ 6/4 6/2 eq:+0.727 (-0.102)
    Player: 67.14% (G:19.94% B:1.24%)
    Opponent: 32.86% (G:9.26% B:0.13%)
    Confidence: ±0.009 (+0.718..+0.736) - [0.0%]

    5. Rollout¹ 6/4 5/1* eq:+0.696 (-0.133)
    Player: 64.80% (G:20.12% B:1.18%)
    Opponent: 35.20% (G:8.96% B:0.14%)
    Confidence: ±0.011 (+0.685..+0.707) - [0.0%]

    ¹ 1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller

    eXtreme Gammon Version: 2.19.211.pre-release

    ---
    Tim Chow

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    * Origin: fsxNet Usenet Gateway (21:1/5)