• Locking up the game

    From Timothy Chow@21:1/5 to All on Sat Mar 19 09:17:08 2022
    XGID=aBBB-CB--D----a----cbbbbb-:1:-1:1:11:0:0:0:0:10

    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-+
    | O | | O O O O O O | +---+
    | | | O O O O O O | | 2 |
    | | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | X | | |
    | X | | X |
    | X | | X X X X X |
    | X | | X X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 75 O: 84 X-O: 0-0
    Cube: 2, O own cube
    X to play 11

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Mar 21 07:51:04 2022
    XGID=aBBB-CB--D----a----cbbbbb-:1:-1:1:11:0:0:0:0:10

    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-+
    | O | | O O O O O O | +---+
    | | | O O O O O O | | 2 |
    | | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | X | | |
    | X | | X |
    | X | | X X X X X |
    | X | | X X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 75 O: 84 X-O: 0-0
    Cube: 2, O own cube
    X to play 11

    9/7(2) leaves no return shots and gives X builders on three separate
    points to make the 4pt. 9/8 9/6 gives O the joker 44 from the bar but
    gives X builders on four separate points. I opted for 9/7(2) but XG
    favors 9/8 9/6. In the variant below, the bold play gives O two rolls
    that hit, and XG favors the safe 9/7(2).

    1. Rollout¹ 9/8 9/6 eq:+0.739
    Player: 86.94% (G:3.04% B:0.03%)
    Opponent: 13.06% (G:0.39% B:0.00%)
    Confidence: ±0.003 (+0.736..+0.742) - [100.0%]

    2. Rollout¹ 9/7(2) eq:+0.687 (-0.052)
    Player: 85.23% (G:2.14% B:0.02%)
    Opponent: 14.77% (G:0.18% B:0.00%)
    Confidence: ±0.003 (+0.683..+0.690) - [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

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

    XGID=aBB-BCB--D----a----cbbbbb-:1:-1:1:11:0:0:0:0:10

    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-+
    | O | | O O O O O O | +---+
    | | | O O O O O O | | 2 |
    | | | O | +---+
    | | | |
    | | | |
    | |BAR| |
    | | O | |
    | X | | |
    | X | | X |
    | X | | X X X X X |
    | X | | X X X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 77 O: 84 X-O: 0-0
    Cube: 2, O own cube
    X to play 11

    1. Rollout¹ 9/7(2) eq:+0.731
    Player: 86.93% (G:2.68% B:0.02%)
    Opponent: 13.07% (G:0.37% B:0.01%)
    Confidence: ±0.003 (+0.728..+0.735) - [100.0%]

    2. Rollout¹ 9/8(2) 4/3(2) eq:+0.708 (-0.024)
    Player: 85.97% (G:2.47% B:0.02%)
    Opponent: 14.03% (G:0.30% B:0.01%)
    Confidence: ±0.003 (+0.705..+0.711) - [0.0%]

    3. Rollout¹ 9/8 9/6 eq:+0.694 (-0.037)
    Player: 84.47% (G:3.22% B:0.02%)
    Opponent: 15.53% (G:0.81% B:0.01%)
    Confidence: ±0.003 (+0.691..+0.697) - [0.0%]

    4. Rollout¹ 9/6 5/4 eq:+0.681 (-0.050)
    Player: 84.26% (G:2.83% B:0.02%)
    Opponent: 15.74% (G:0.54% B:0.00%)
    Confidence: ±0.003 (+0.678..+0.685) - [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)