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  • It's a blitz!

    From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Wed Jan 10 22:14:55 2024
    From Newsgroup: rec.games.backgammon

    XGID=bBB-C-BA-A--cA-b-c-cbB--A-:1:-1:1:51:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O | | O O X X | +---+
    | O O | | O O X | | 2 |
    | O | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | O | |
    | O | | X |
    | O | | X X X X |
    | O X X | | X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 161 X-O: 0-0
    Cube: 2, O own cube
    X to play 51

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Stick Rice@bananaboater315@gmail.com to rec.games.backgammon on Thu Jan 11 15:14:05 2024
    From Newsgroup: rec.games.backgammon

    On Wednesday, January 10, 2024 at 10:15:02rC>PM UTC-5, Timothy Chow wrote:
    XGID=bBB-C-BA-A--cA-b-c-cbB--A-:1:-1:1:51:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O | | O O X X | +---+
    | O O | | O O X | | 2 |
    | O | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | O | |
    | O | | X |
    | O | | X X X X |
    | O X X | | X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 161 X-O: 0-0
    Cube: 2, O own cube
    X to play 51

    ---
    Tim Chow
    The five has to be off the anchor and the best ace after that is 7/6. Playing 13/8would be quite the overplay.
    Stick
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Tue Jan 16 08:42:42 2024
    From Newsgroup: rec.games.backgammon

    XGID=bBB-C-BA-A--cA-b-c-cbB--A-:1:-1:1:51:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O | | O O X X | +---+
    | O O | | O O X | | 2 |
    | O | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | O | |
    | O | | X |
    | O | | X X X X |
    | O X X | | X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 161 X-O: 0-0
    Cube: 2, O own cube
    X to play 51

    The normal approach in a blitz is to keep bringing down more ammunition
    to try to complete the closeout. But if you have several builders
    already and your back checkers are somewhat hemmed in, then at some
    point you need to start freeing those checkers, lest you roll something
    awkward and are forced to collapse.

    If X's checkers on his 21pt were split then jumping out would not be so
    urgent (see variant below).

    1. Rollout-| 21/16 7/6 eq:+0.636
    Player: 67.33% (G:50.93% B:0.30%)
    Opponent: 32.67% (G:7.89% B:0.50%)
    Confidence: -#0.010 (+0.626..+0.646) - [100.0%]

    2. Rollout-| 21/16 9/8 eq:+0.594 (-0.042)
    Player: 66.03% (G:50.15% B:0.29%)
    Opponent: 33.97% (G:8.98% B:0.62%)
    Confidence: -#0.012 (+0.582..+0.606) - [0.0%]

    3. Rollout-| 24/23 21/16 eq:+0.572 (-0.064)
    Player: 65.83% (G:49.46% B:0.30%)
    Opponent: 34.17% (G:9.07% B:0.62%)
    Confidence: -#0.011 (+0.562..+0.583) - [0.0%]

    4. Rollout-| 21/16 4/3 eq:+0.532 (-0.104)
    Player: 64.58% (G:49.47% B:0.31%)
    Opponent: 35.42% (G:10.90% B:0.95%)
    Confidence: -#0.011 (+0.521..+0.543) - [0.0%]

    5. Rollout-| 24/18 eq:+0.518 (-0.118)
    Player: 64.64% (G:46.38% B:0.29%)
    Opponent: 35.36% (G:9.04% B:0.52%)
    Confidence: -#0.010 (+0.509..+0.528) - [0.0%]

    6. Rollout-| 13/8 7/6 eq:+0.474 (-0.162)
    Player: 63.14% (G:46.22% B:0.28%)
    Opponent: 36.86% (G:8.78% B:0.46%)
    Confidence: -#0.012 (+0.462..+0.487) - [0.0%]

    7. Rollout-| 13/8 4/3 eq:+0.466 (-0.171)
    Player: 62.69% (G:46.75% B:0.22%)
    Opponent: 37.31% (G:10.02% B:0.52%)
    Confidence: -#0.011 (+0.454..+0.477) - [0.0%]

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

    eXtreme Gammon Version: 2.19.211.pre-release

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

    XGID=bBB-C-BA-A--cA-b-c-cbAA-A-:1:-1:1:51:0:0:0:0:10

    Score is X:0 O:0. Unlimited Game
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O | | O O X X X | +---+
    | O O | | O O | | 2 |
    | O | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | | O | |
    | O | | X |
    | O | | X X X X |
    | O X X | | X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 126 O: 161 X-O: 0-0
    Cube: 2, O own cube
    X to play 51

    1. Rollout-| 21/16 7/6 eq:+0.624
    Player: 66.84% (G:51.67% B:0.29%)
    Opponent: 33.16% (G:8.86% B:0.63%)
    Confidence: -#0.010 (+0.615..+0.634) - [90.8%]

    2. Rollout-| 21/16 9/8 eq:+0.612 (-0.012)
    Player: 66.47% (G:51.28% B:0.28%)
    Opponent: 33.53% (G:9.51% B:0.75%)
    Confidence: -#0.009 (+0.604..+0.621) - [2.5%]

    3. Rollout-| 24/23 21/16 eq:+0.612 (-0.013)
    Player: 66.62% (G:51.71% B:0.30%)
    Opponent: 33.38% (G:9.55% B:0.84%)
    Confidence: -#0.010 (+0.602..+0.622) - [2.8%]

    4. Rollout-| 22/16 eq:+0.610 (-0.014)
    Player: 66.54% (G:50.78% B:0.30%)
    Opponent: 33.46% (G:8.62% B:0.60%)
    Confidence: -#0.010 (+0.600..+0.621) - [2.1%]

    5. Rollout-| 13/8 7/6 eq:+0.610 (-0.015)
    Player: 66.38% (G:51.16% B:0.30%)
    Opponent: 33.62% (G:8.49% B:0.50%)
    Confidence: -#0.011 (+0.599..+0.621) - [1.8%]

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


    eXtreme Gammon Version: 2.19.211.pre-release
    --- Synchronet 3.21b-Linux NewsLink 1.2