• Break anchor or kill a checker?

    From Timothy Chow@21:1/5 to All on Fri Jul 21 08:30:54 2023
    XGID=-B---CDBa---bBaa---dbbBb--:0:0:1:63:0:0:0:0:10

    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 O X O |
    | X | | O O O X O |
    | | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X X |
    | O X | | X X X |
    | O O X | | X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 110 X-O: 0-0
    Cube: 1
    X to play 63

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From ah....Clem@21:1/5 to Timothy Chow on Fri Jul 21 16:46:10 2023
    On 7/21/2023 8:30 AM, Timothy Chow wrote:
    XGID=-B---CDBa---bBaa---dbbBb--:0:0:1:63:0:0:0:0:10

    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  O  X  O    |
     | X                |   | O  O  O  X  O    |
     |                  |   | O                |
     |                  |   | O                |
     |                  |   |                  |
     |                  |BAR|                  |
     |                  |   |                  |
     |                  |   | X                |
     |                  |   | X  X             |
     | O              X |   | X  X           X |
     | O           O  X |   | X  X           X |
     +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 125  O: 110 X-O: 0-0
    Cube: 1
    X to play 63

    12 in the zone and 15 pips behind make me think running off the anchor
    is the wrong idea. I'd play two down from the midpoint before that.
    Fewer shots, keep the anchor to avoid gammons, and maintain contact
    since behind in the race.

    Is D better than burying one on the ace? Seems to be. If not hit, X is
    in decent shape with a nice board and an anchor.

    13/7 13/10.

    --
    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 Sun Jul 23 09:03:33 2023
    XGID=-B---CDBa---bBaa---dbbBb--:0:0:1:63:0:0:0:0:10

    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 O X O |
    | X | | O O O X O |
    | | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X X |
    | O X | | X X X |
    | O O X | | X X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 110 X-O: 0-0
    Cube: 1
    X to play 63

    I hate killing checkers so I tried 22/13 here. XG hates it. But
    see the variant for what happens if we shift O's checkers on her
    2pt to her 1pt.

    1. Rollout¹ 7/1 6/3 eq:-0.788
    Player: 28.04% (G:2.01% B:0.05%)
    Opponent: 71.96% (G:7.23% B:0.33%)
    Confidence: ±0.010 (-0.798..-0.778) - [100.0%]

    2. Rollout¹ 7/4 7/1 eq:-0.819 (-0.030)
    Player: 27.48% (G:1.96% B:0.04%)
    Opponent: 72.52% (G:7.51% B:0.26%)
    Confidence: ±0.012 (-0.831..-0.806) - [0.0%]

    3. Rollout¹ 7/1 5/2 eq:-0.833 (-0.045)
    Player: 26.93% (G:1.64% B:0.03%)
    Opponent: 73.07% (G:6.30% B:0.30%)
    Confidence: ±0.010 (-0.843..-0.823) - [0.0%]

    4. Rollout¹ 22/13 eq:-0.897 (-0.109)
    Player: 28.38% (G:5.72% B:0.20%)
    Opponent: 71.62% (G:17.14% B:0.20%)
    Confidence: ±0.012 (-0.909..-0.885) - [0.0%]

    ¹ 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=-B---CDBa---bBaa---dbbB-b-:1:1:1:63:0:0:0:0:10

    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 O X O |
    | X | | O O O X O |
    | | | O |
    | | | O |
    | | | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X X | +---+
    | O X | | X X X | | 2 |
    | O O X | | X X X | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 125 O: 108 X-O: 0-0
    Cube: 2, X own cube
    X to play 63

    1. Rollout¹ 22/13 eq:-0.388
    Player: 30.27% (G:5.45% B:0.18%)
    Opponent: 69.73% (G:15.15% B:0.16%)
    Confidence: ±0.006 (-0.394..-0.383) - [63.5%]

    2. Rollout¹ 7/1 6/3 eq:-0.390 (-0.001)
    Player: 28.20% (G:2.10% B:0.04%)
    Opponent: 71.80% (G:7.43% B:0.34%)
    Confidence: ±0.006 (-0.396..-0.384) - [36.5%]

    3. Rollout¹ 7/4 7/1 eq:-0.401 (-0.013)
    Player: 28.18% (G:2.26% B:0.05%)
    Opponent: 71.82% (G:8.39% B:0.35%)
    Confidence: ±0.006 (-0.407..-0.395) - [0.0%]

    4. Rollout¹ 7/1 5/2 eq:-0.414 (-0.025)
    Player: 27.22% (G:1.72% B:0.03%)
    Opponent: 72.78% (G:6.94% B:0.33%)
    Confidence: ±0.005 (-0.419..-0.409) - [0.0%]

    5. Rollout¹ 13/10 13/7 eq:-0.458 (-0.070)
    Player: 25.63% (G:2.05% B:0.05%)
    Opponent: 74.37% (G:7.45% B:0.21%)
    Confidence: ±0.005 (-0.464..-0.453) - [0.0%]

    ¹ 1296 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 3-ply, cube decisions: XG Roller

    eXtreme Gammon Version: 2.19.211.pre-release

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)