• Break anchor and hit, or dump?

    From Timothy Chow@21:1/5 to All on Tue Sep 27 23:35:52 2022
    XGID=--CCAbBBB--a------bbBcbba-:1:1:1:54:0:0:0:0:10

    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 X O O O O |
    | O | | O X O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | X X | | X O X X | | 2 |
    | O X X | | X O X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 101 O: 103 X-O: 0-0
    Cube: 2, X own cube
    X to play 54

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From ah....Clem@21:1/5 to Timothy Chow on Wed Sep 28 20:31:55 2022
    On 9/27/2022 11:35 PM, Timothy Chow wrote:
    XGID=--CCAbBBB--a------bbBcbba-:1:1:1:54:0:0:0:0:10

    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  X  O  O  O  O |
     |                O |   | O  X  O  O  O    |
     |                  |   |       O          |
     |                  |   |                  |
     |                  |   |                  |
     |                  |BAR|                  |
     |                  |   |                  |
     |                  |   |                  |
     |                  |   |          X  X    | +---+
     |             X  X |   | X  O     X  X    | | 2 |
     |    O        X  X |   | X  O  X  X  X    | +---+
     +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 101  O: 103 X-O: 0-0
    Cube: 2, X own cube
    X to play 54

    Dumping seems weak. O dances nine times and only hits from the bar 13
    times (with a fair number of other loose hits) Maybe if X was farther
    ahead in the race I'd dump, but unless O shakes 43 or 11 we have
    counterplay when hit.

    20/11*


    --
    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 Fri Sep 30 08:05:26 2022
    XGID=--CCAbBBB--a------bbBcbba-:1:1:1:54:0:0:0:0:10

    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 X O O O O |
    | O | | O X O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | X X | | X O X X | | 2 |
    | O X X | | X O X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 101 O: 103 X-O: 0-0
    Cube: 2, X own cube
    X to play 54

    Hitting is tempting, but it means breaking the golden anchor, and
    X has a blot in his board. O is the one who is behind in the pip
    count and stands to gain more from a blot-hitting contest. XG says
    that hitting is a whopper with cheese. But see the variant below,
    where XG says that hitting and playing safe are very close.

    1. Rollout¹ 8/4 8/3 eq:+0.118
    Player: 48.82% (G:4.96% B:0.10%)
    Opponent: 51.18% (G:7.02% B:0.26%)
    Confidence: ±0.006 (+0.112..+0.123) - [100.0%]

    2. Rollout¹ 20/11* eq:-0.022 (-0.140)
    Player: 46.14% (G:10.12% B:0.37%)
    Opponent: 53.86% (G:21.91% B:0.94%)
    Confidence: ±0.008 (-0.030..-0.014) - [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=--CABbCBB--a------bbBcbba-:1:1:1:54:0:0:0:0:10

    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 X O O O O |
    | O | | O X O O O |
    | | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | | | X X | +---+
    | X X | | X O X X | | 2 |
    | O X X | | X O X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 105 O: 103 X-O: 0-0
    Cube: 2, X own cube
    X to play 54

    1. Rollout¹ 8/4 8/3 eq:+0.189
    Player: 51.04% (G:5.54% B:0.12%)
    Opponent: 48.96% (G:5.13% B:0.16%)
    Confidence: ±0.007 (+0.182..+0.196) - [99.4%]

    2. Rollout¹ 20/11* eq:+0.175 (-0.013)
    Player: 51.96% (G:11.56% B:0.50%)
    Opponent: 48.04% (G:18.44% B:0.69%)
    Confidence: ±0.008 (+0.168..+0.183) - [0.6%]

    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)