• 4-away/2-away checker play

    From Timothy Chow@21:1/5 to All on Fri Nov 19 09:00:43 2021
    XGID=----B-CCa--a-C--bcbd-bBA-A:0:0:1:32:3:5:0:7:10

    X:Player 1 O:Player 2
    Score is X:3 O:5 7 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X X |
    | X O O O | | O O X |
    | X O | | O |
    | | | O |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | X | | X X |
    | O O X | | X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 178 O: 119 X-O: 3-5/7
    Cube: 1
    X to play 32

    ---
    Tim Chow

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From ah...Clem@21:1/5 to Timothy Chow on Fri Nov 19 11:25:14 2021
    On 11/19/2021 9:00 AM, Timothy Chow wrote:
    XGID=----B-CCa--a-C--bcbd-bBA-A:0:0:1:32:3:5:0:7:10

    X:Player 1   O:Player 2
    Score is X:3 O:5 7 pt.(s) match.  +13-14-15-16-17-18------19-20-21-22-23-24-+
     | X        O  O  O |   | O     O  X  X    |
     | X        O  O  O |   | O     O  X       |
     | X           O    |   | O                |  |                  |   | O                |
     |                  | X |                  |
     |                  |BAR|                  |
     |                  |   |                  |
     |                  |   |                  |
     |                X |   | X                |  |                X |   | X     X          |  |    O        O  X |   | X     X          |  +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 178  O: 119 X-O: 3-5/7
    Cube: 1
    X to play 32

    Making the second anchor and slotting the five point looks good, but ~50
    pips is not enough timing for a backgame so I'll hit.

    bar/22 13/11*

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  • From J R@21:1/5 to ah...Clem on Fri Nov 19 16:29:45 2021
    On Friday, November 19, 2021 at 11:25:18 AM UTC-5, ah...Clem wrote:
    On 11/19/2021 9:00 AM, Timothy Chow wrote:
    XGID=----B-CCa--a-C--bcbd-bBA-A:0:0:1:32:3:5:0:7:10

    X:Player 1 O:Player 2
    Score is X:3 O:5 7 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X X |
    | X O O O | | O O X |
    | X O | | O |
    | | | O |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | X | | X X |
    | O O X | | X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 178 O: 119 X-O: 3-5/7
    Cube: 1
    X to play 32
    Making the second anchor and slotting the five point looks good, but ~50
    pips is not enough timing for a backgame so I'll hit.

    bar/22 13/11*

    Making the second anchor and slotting the five point is not legal. And it's 54 pips + not on roll + that amount of pips out of 120 pips.

    Stick

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Tim Chow@21:1/5 to All on Sun Nov 21 10:30:55 2021
    XGID=----B-CCa--a-C--bcbd-bBA-A:0:0:1:32:3:5:0:7:10

    X:Player 1 O:Player 2
    Score is X:3 O:5 7 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X X |
    | X O O O | | O O X |
    | X O | | O |
    | | | O |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | X | | X X |
    | O O X | | X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 178 O: 119 X-O: 3-5/7
    Cube: 1
    X to play 32

    4-away/2-away checker play is typically very similar to
    gammon go checker play, and at gammon go, hitting
    13/11* is a serious candidate play to consider. But,
    if the cube is not yet turned, the 4-away player does
    need to give thought to the possibility of losing a gammon.
    The rollout favors making the second anchor.

    1. Rollout¹ Bar/23 13/10 eq:-0.417
    Player: 35.03% (G:5.35% B:0.30%)
    Opponent: 64.97% (G:23.07% B:3.07%)
    Confidence: ±0.016 (-0.433..-0.402) - [98.2%]

    2. Rollout¹ Bar/23 6/3 eq:-0.441 (-0.024)
    Player: 34.28% (G:5.35% B:0.56%)
    Opponent: 65.72% (G:23.28% B:3.90%)
    Confidence: ±0.016 (-0.457..-0.425) - [1.8%]

    3. Rollout¹ Bar/23 7/4 eq:-0.485 (-0.068)
    Player: 33.25% (G:4.81% B:0.35%)
    Opponent: 66.75% (G:22.96% B:3.91%)
    Confidence: ±0.017 (-0.502..-0.469) - [0.0%]

    4. Rollout¹ Bar/22 13/11* eq:-0.504 (-0.086)
    Player: 32.74% (G:6.78% B:0.50%)
    Opponent: 67.26% (G:28.41% B:4.43%)
    Confidence: ±0.019 (-0.523..-0.485) - [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, MET: Kazaross XG2

    ---------
    Gammon go
    ---------

    XGID=----B-CCa--a-C--bcbd-bBA-A:0:0:1:32:0:1:1:2:10

    X:Player 1 O:Player 2
    Score is X:0 O:1 2 pt.(s) match.
    +13-14-15-16-17-18------19-20-21-22-23-24-+
    | X O O O | | O O X X |
    | X O O O | | O O X |
    | X O | | O |
    | | | O |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | X | | X X |
    | O O X | | X X |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 178 O: 119 X-O: 0-1/2 Crawford
    Cube: 1
    X to play 32

    1. Rollout¹ Bar/23 13/10 eq:-0.165
    Player: 35.76% (G:5.99% B:0.47%)
    Opponent: 64.24% (G:28.40% B:3.77%)
    Confidence: ±0.008 (-0.173..-0.157) - [87.3%]

    2. Rollout¹ Bar/22 13/11* eq:-0.172 (-0.007)
    Player: 34.15% (G:7.26% B:0.62%)
    Opponent: 65.85% (G:35.78% B:5.57%)
    Confidence: ±0.009 (-0.181..-0.163) - [12.6%]

    3. Rollout¹ Bar/23 6/3 eq:-0.181 (-0.016)
    Player: 35.34% (G:5.61% B:0.44%)
    Opponent: 64.66% (G:28.76% B:3.99%)
    Confidence: ±0.008 (-0.189..-0.173) - [0.1%]

    4. Rollout¹ Bar/23 7/4 eq:-0.207 (-0.042)
    Player: 34.41% (G:5.22% B:0.21%)
    Opponent: 65.59% (G:28.61% B:3.73%)
    Confidence: ±0.008 (-0.215..-0.199) - [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, MET: Kazaross XG2

    ---
    Tim Chow

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