• Mutual holding game 3

    From Timothy Chow@21:1/5 to All on Fri Jan 14 10:12:05 2022
    XGID=----AbCCB--abB-B---ddbB---:0:0:1:63:0:0:0:0:10

    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 X | | O O O X |
    | X X | | O O O X |
    | | | O O |
    | | | O O |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | O X X | | X O |
    | O O X X | | X O X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 159 O: 132 X-O: 0-0
    Cube: 1
    X to play 63

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From badgolferman@21:1/5 to Timothy Chow on Sun Jan 16 12:51:02 2022
    Timothy Chow wrote:

    XGID=----AbCCB--abB-B---ddbB---:0:0:1:63:0:0:0:0:10

    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 X | | O O O X |
    | X X | | O O O X |
    | | | O O |
    | | | O O |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | O X X | | X O |
    | O O X X | | X O X | +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 159 O: 132 X-O: 0-0
    Cube: 1
    X to play 63

    ---
    Tim Chow


    I would probably run. 22/13.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Sun Jan 16 13:39:16 2022
    XGID=----AbCCB--abB-B---ddbB---:0:0:1:63:0:0:0:0:10

    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 X | | O O O X |
    | X X | | O O O X |
    | | | O O |
    | | | O O |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | O X X | | X O |
    | O O X X | | X O X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 159 O: 132 X-O: 0-0
    Cube: 1
    X to play 63

    I'm afraid that XG puts badgolferman's play of 22/13 in triple whopper territory, and I didn't roll it out. The choices I considered were
    whether to play totally safe or to leave a blot in the outfield, and
    if the latter, where to leave the blot. The safe plays dump checkers
    deep in X's board and leave him totally stripped, and are not good.

    I opted for 13/10 13/7, thinking that it minimized shots and forced
    O to break anchor to hit. However, XG strongly prefers 13/4, covering
    the blot in his board. Something I'm still trying to develop a feel
    for is how important it is to cover blots in my board behind the
    opponent's anchor when I'm trying to discourage my opponent from
    running. See also the variant.

    1. Rollout¹ 13/4 eq:-0.324
    Player: 42.75% (G:8.29% B:0.38%)
    Opponent: 57.25% (G:17.28% B:0.57%)
    Confidence: ±0.014 (-0.338..-0.309) - [100.0%]

    2. Rollout¹ 13/10 13/7 eq:-0.412 (-0.089)
    Player: 40.17% (G:7.19% B:0.28%)
    Opponent: 59.83% (G:16.14% B:0.56%)
    Confidence: ±0.014 (-0.426..-0.398) - [0.0%]

    3. Rollout¹ 15/9 7/4 eq:-0.488 (-0.165)
    Player: 39.65% (G:6.94% B:0.35%)
    Opponent: 60.35% (G:20.54% B:0.76%)
    Confidence: ±0.014 (-0.502..-0.475) - [0.0%]

    4. Rollout¹ 8/2 7/4 eq:-0.497 (-0.173)
    Player: 38.87% (G:7.79% B:0.31%)
    Opponent: 61.13% (G:19.19% B:0.77%)
    Confidence: ±0.015 (-0.512..-0.482) - [0.0%]

    5. Rollout¹ 7/1 4/1 eq:-0.500 (-0.177)
    Player: 37.39% (G:7.55% B:0.20%)
    Opponent: 62.61% (G:15.77% B:0.55%)
    Confidence: ±0.012 (-0.513..-0.488) - [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=-----bDCB--abB-B---ddbB---:0:0:1:63:0:0:0:0:10

    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 X | | O O O X |
    | X X | | O O O X |
    | | | O O |
    | | | O O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | X | | X |
    | O X X | | X O |
    | O O X X | | X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 161 O: 132 X-O: 0-0
    Cube: 1
    X to play 63

    1. Rollout¹ 13/10 13/7 eq:-0.486
    Player: 38.68% (G:6.76% B:0.27%)
    Opponent: 61.32% (G:17.38% B:0.62%)
    Confidence: ±0.007 (-0.493..-0.478) - [78.9%]

    2. Rollout¹ 13/4 eq:-0.490 (-0.004)
    Player: 38.79% (G:7.41% B:0.31%)
    Opponent: 61.21% (G:19.11% B:0.67%)
    Confidence: ±0.008 (-0.498..-0.482) - [21.1%]

    ¹ 5184 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)