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  • Early game 32

    From Timothy Chow@21:1/5 to All on Sat Jul 23 08:48:11 2022
    XGID=-a-a--EBB---dD---bbcb---B-:0:0:1:32:0:0:0:0:10

    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 |
    | X | | |
    | | | |
    | |BAR| |
    | | | X |
    | O | | X |
    | O | | X |
    | O X X | | X |
    | O X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 160 O: 156 X-O: 0-0
    Cube: 1
    X to play 32

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From ah....Clem@21:1/5 to Timothy Chow on Sun Jul 24 16:57:46 2022
    On 7/23/2022 8:48 AM, Timothy Chow wrote:
    XGID=-a-a--EBB---dD---bbcb---B-:0:0:1:32:0:0:0:0:10

    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                |
     | X                |   |                  |
     |                  |   |                  |
     |                  |BAR|                  |
     |                  |   | X                |
     | O                |   | X                |
     | O                |   | X                |
     | O           X  X |   | X                |
     | O           X  X |   | X        O     O |
     +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 160  O: 156 X-O: 0-0
    Cube: 1
    X to play 32

    Splitting seems thematic. But whacking both has its merits too. The
    chicken play seems weak. The hybrid plays 6/3* 24/22 and 6/3* 13/11 are intriguing too.

    Hitting (one checker) loose seems to lack enough follow-on, but may well
    be the bot play. I'll go for the simple split since I have a hunch it's
    not all that wrong if not best. 24/21 13/11.


    --
    Ah....Clem
    The future is fun, the future is fair.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Jul 25 09:04:42 2022
    XGID=-a-a--EBB---dD---bbcb---B-:0:0:1:32:0:0:0:0:10

    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 |
    | X | | |
    | | | |
    | |BAR| |
    | | | X |
    | O | | X |
    | O | | X |
    | O X X | | X |
    | O X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 160 O: 156 X-O: 0-0
    Cube: 1
    X to play 32

    In his response, ah_clem mentioned many candidates, but not the bot play
    of 24/22 24/21. This sort of play reminds me of former chess world
    champion Mikhail Tal, who was famous for leaving multiple pieces en
    prise (vulnerable to capture). He would say, "They can take only one
    piece at a time!" In backgammon, some rolls actually allow O to hit
    (or even point on) both of X's blots after 24/22 24/21, but most do not.
    If only one checker is hit, X may escape, or anchor on, the other one.

    1. Rollout¹ 24/22 24/21 eq:-0.445
    Player: 40.31% (G:9.54% B:0.45%)
    Opponent: 59.69% (G:20.32% B:0.70%)
    Confidence: ±0.013 (-0.458..-0.432) - [100.0%]

    2. Rollout¹ 24/21 13/11 eq:-0.532 (-0.087)
    Player: 37.60% (G:9.16% B:0.41%)
    Opponent: 62.40% (G:19.05% B:1.02%)
    Confidence: ±0.019 (-0.551..-0.513) - [0.0%]

    3. Rollout¹ 24/22 6/3* eq:-0.577 (-0.132)
    Player: 36.23% (G:8.67% B:0.36%)
    Opponent: 63.77% (G:18.19% B:0.95%)
    Confidence: ±0.017 (-0.594..-0.560) - [0.0%]

    4. Rollout¹ 24/22 13/10 eq:-0.600 (-0.155)
    Player: 35.97% (G:8.48% B:0.35%)
    Opponent: 64.03% (G:19.48% B:0.99%)
    Confidence: ±0.013 (-0.613..-0.587) - [0.0%]

    5. Rollout¹ 6/3* 3/1* eq:-0.660 (-0.214)
    Player: 34.06% (G:9.31% B:0.26%)
    Opponent: 65.94% (G:19.61% B:1.08%)
    Confidence: ±0.015 (-0.675..-0.645) - [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)