1. Forum
  2. Usenet
  3. REC.GAMES.BACKGAMMON

  • Here's a 33 for Paul to test his adage against

    From Timothy Chow@21:1/5 to All on Fri Sep 3 08:16:51 2021
    XGID=-b--B-D-BA-AcC---b-db-b-B-:0:0:1:33:0:0:0:0:10

    X:Player 1 O:Player 2
    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O O X |
    | X O | | O O O X |
    | X | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | O | | X |
    | O X | | X X O |
    | O X X X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 143 X-O: 0-0
    Cube: 1
    X to play 33

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From badgolferman@21:1/5 to Timothy Chow on Fri Sep 3 13:47:20 2021
    Timothy Chow wrote:

    XGID=-b--B-D-BA-AcC---b-db-b-B-:0:0:1:33:0:0:0:0:10

    X:Player 1 O:Player 2
    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O O X |
    | X O | | O O O X |
    | X | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | O | | X |
    | O X | | X X O |
    | O X X X | | X X O | +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 143 X-O: 0-0
    Cube: 1
    X to play 33

    ---
    Tim Chow


    My play would be 24/21(2), 8/5(2)

    I want to harass any outer board checkers and take my own 5-point.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to Tim Chow on Fri Sep 3 11:55:54 2021
    On Friday, September 3, 2021 at 1:16:53 PM UTC+1, Tim Chow wrote:
    XGID=-b--B-D-BA-AcC---b-db-b-B-:0:0:1:33:0:0:0:0:10

    X:Player 1 O:Player 2
    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O O X |
    | X O | | O O O X |
    | X | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | O | | X |
    | O X | | X X O |
    | O X X X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 143 X-O: 0-0
    Cube: 1
    X to play 33

    ---
    Tim Chow

    I don't know whether I play golf badly or not, because i play too rarely to find out.
    However, I imagine that I'd be really bad at it.
    So the bad-golf play makes sense and, in any case, I had Waltishly decided on that
    play before reading his response.

    It isn't the wisest adage in the history of humanity but it does help me because I've
    lost a lot of equity through wrongly making the 5 point. However, this position seems too
    standard for me to do anything other than 24/21(2) 8/5(2).
    This doesn't make my adage wrong because this is an obvious exception.

    Paul

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Sep 6 22:26:35 2021
    XGID=-b--B-D-BA-AcC---b-db-b-B-:0:0:1:33:0:0:0:0:10

    X:Player 1 O:Player 2
    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O | | O O O X |
    | X O | | O O O X |
    | X | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | O | | X |
    | O X | | X X O |
    | O X X X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 143 X-O: 0-0
    Cube: 1
    X to play 33

    I managed to overthink this one OTB and played 8/5(2) 6/3(2), but
    there's no good reason to spurn the "obvious" play of grabbing the
    advanced anchor and the 5pt.

    1. Rollout¹ 24/21(2) 8/5(2) eq:+0.467
    Player: 59.99% (G:20.47% B:0.66%)
    Opponent: 40.01% (G:9.29% B:0.37%)
    Confidence: ±0.013 (+0.454..+0.480) - [100.0%]

    2. Rollout¹ 24/21(2) 6/3(2) eq:+0.360 (-0.107)
    Player: 58.54% (G:18.01% B:0.68%)
    Opponent: 41.46% (G:10.11% B:0.39%)
    Confidence: ±0.013 (+0.347..+0.373) - [0.0%]

    3. Rollout¹ 8/5(2) 6/3(2) eq:+0.346 (-0.121)
    Player: 58.38% (G:20.69% B:1.26%)
    Opponent: 41.62% (G:14.33% B:1.03%)
    Confidence: ±0.015 (+0.330..+0.361) - [0.0%]

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

    eXtreme Gammon Version: 2.19.207.pre-release

    ---
    Tim Chow

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