• Anchor or hit?

    From Timothy Chow@21:1/5 to All on Sun Dec 19 20:38:28 2021
    XGID=---bBBD-C---aBb---bbbbb-AA:1:1:1:21:0:0:0:0:10

    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 O O | | O O O O X |
    | X O O | | O O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | X | | X | +---+
    | X | | X X X O | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 141 O: 129 X-O: 0-0
    Cube: 2, X own cube
    X to play 21

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Wed Dec 22 08:07:41 2021
    XGID=---bBBD-C---aBb---bbbbb-AA:1:1:1:21:0:0:0:0:10

    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 O O | | O O O O X |
    | X O O | | O O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | X | | X | +---+
    | X | | X X X O | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 141 O: 129 X-O: 0-0
    Cube: 2, X own cube
    X to play 21

    According to XG, this is a close decision at DMP, but hitting
    loses too many gammons for money. See also the variant, where
    X doesn't have to break his midpoint to hit.

    1. Rollout¹ Bar/23 24/23 eq:-0.180
    Player: 37.52% (G:8.38% B:0.30%)
    Opponent: 62.48% (G:15.31% B:0.72%)
    Confidence: ±0.009 (-0.189..-0.171) - [100.0%]

    2. Rollout¹ Bar/23 13/12* eq:-0.252 (-0.072)
    Player: 37.05% (G:10.54% B:0.46%)
    Opponent: 62.95% (G:22.22% B:1.52%)
    Confidence: ±0.012 (-0.264..-0.241) - [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=---bBBD-B---aCb---bbbbb-AA:1:1:1:21:0:0:0:0:10

    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 O O | | O O O O X |
    | X O O | | O O O O |
    | X | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X | +---+
    | X | | X X X O | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 146 O: 129 X-O: 0-0
    Cube: 2, X own cube
    X to play 21

    1. Rollout¹ Bar/23 24/23 eq:-0.151
    Player: 38.71% (G:8.82% B:0.31%)
    Opponent: 61.29% (G:15.73% B:0.78%)
    Confidence: ±0.008 (-0.159..-0.143) - [81.4%]

    2. Rollout¹ Bar/23 13/12* eq:-0.157 (-0.006)
    Player: 40.34% (G:11.37% B:0.54%)
    Opponent: 59.66% (G:22.26% B:1.26%)
    Confidence: ±0.010 (-0.167..-0.147) - [18.6%]

    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)
  • From Stick Rice@21:1/5 to Tim Chow on Sat Jan 1 15:59:51 2022
    On Wednesday, December 22, 2021 at 8:07:45 AM UTC-5, Tim Chow wrote:
    XGID=---bBBD-C---aBb---bbbbb-AA:1:1:1:21:0:0:0:0:10

    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 O O | | O O O O X |
    | X O O | | O O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | X | | X | +---+
    | X | | X X X O | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 141 O: 129 X-O: 0-0
    Cube: 2, X own cube
    X to play 21
    According to XG, this is a close decision at DMP, but hitting
    loses too many gammons for money. See also the variant, where
    X doesn't have to break his midpoint to hit.

    1. Rollout¹ Bar/23 24/23 eq:-0.180
    Player: 37.52% (G:8.38% B:0.30%)
    Opponent: 62.48% (G:15.31% B:0.72%)
    Confidence: ±0.009 (-0.189..-0.171) - [100.0%]

    2. Rollout¹ Bar/23 13/12* eq:-0.252 (-0.072)
    Player: 37.05% (G:10.54% B:0.46%)
    Opponent: 62.95% (G:22.22% B:1.52%)
    Confidence: ±0.012 (-0.264..-0.241) - [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=---bBBD-B---aCb---bbbbb-AA:1:1:1:21:0:0:0:0:10
    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 O O | | O O O O X |
    | X O O | | O O O O |
    | X | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X | +---+
    | X | | X X X O | | 2 |
    | O X | | X X X O | +---+
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 146 O: 129 X-O: 0-0
    Cube: 2, X own cube
    X to play 21
    1. Rollout¹ Bar/23 24/23 eq:-0.151
    Player: 38.71% (G:8.82% B:0.31%)
    Opponent: 61.29% (G:15.73% B:0.78%)
    Confidence: ±0.008 (-0.159..-0.143) - [81.4%]

    2. Rollout¹ Bar/23 13/12* eq:-0.157 (-0.006)
    Player: 40.34% (G:11.37% B:0.54%)
    Opponent: 59.66% (G:22.26% B:1.26%)
    Confidence: ±0.010 (-0.167..-0.147) - [18.6%]

    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

    It's still right by ~.025 or about 1.25% at dmp to anchor.

    Stick

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Mon Jan 31 08:59:49 2022
    XGID=-a--aBD-C---dD---c-d-Ab-A-:0:0:1:21:0:0:0:0:10

    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 O | | O X O X |
    | X O | | O O |
    | X O | | O |
    | X | | O |
    | | | |
    | |BAR| |
    | | | |
    | O | | X |
    | O X | | X |
    | O X | | X X |
    | O X | | X X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 151 X-O: 0-0
    Cube: 1
    X to play 21

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Wed Feb 2 09:09:25 2022
    XGID=-a--aBD-C---dD---c-d-Ab-A-:0:0:1:21:0:0:0:0:10

    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 O | | O X O X |
    | X O | | O O |
    | X O | | O |
    | X | | O |
    | | | |
    | |BAR| |
    | | | |
    | O | | X |
    | O X | | X |
    | O X | | X X |
    | O X | | X X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 151 X-O: 0-0
    Cube: 1
    X to play 21

    Anchoring didn't seem too urgent to me here since O's board isn't
    that strong, so I opted to fight for the 4pt. According to XG,
    that's a whopper. (Oops, I guess I've been instructed that it's not
    a whopper if X plays 24/23 instead of 21/20.) However, in the
    variant below, where O's structure is even weaker, XG favors the hit.

    1. Rollout¹ 24/21 eq:+0.266
    Player: 56.15% (G:13.85% B:0.43%)
    Opponent: 43.85% (G:7.66% B:0.30%)
    Confidence: ±0.012 (+0.253..+0.278) - [100.0%]

    2. Rollout¹ 24/23 6/4* eq:+0.167 (-0.099)
    Player: 54.27% (G:16.53% B:0.74%)
    Opponent: 45.73% (G:14.75% B:0.68%)
    Confidence: ±0.016 (+0.151..+0.182) - [0.0%]

    3. Rollout¹ 21/20 6/4* eq:+0.166 (-0.100)
    Player: 54.36% (G:16.94% B:0.77%)
    Opponent: 45.64% (G:14.39% B:0.78%)
    Confidence: ±0.015 (+0.151..+0.181) - [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=-a--aBD-C---dD---d-e-A--A-:0:0:1:21:0:0:0:0:10

    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 O | | O X X |
    | X O | | O |
    | X O | | O |
    | X O | | O |
    | | | O |
    | |BAR| |
    | | | |
    | O | | X |
    | O X | | X |
    | O X | | X X |
    | O X | | X X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 155 O: 159 X-O: 0-0
    Cube: 1
    X to play 21

    1. Rollout¹ 21/20 6/4* eq:+0.412
    Player: 58.94% (G:19.38% B:0.89%)
    Opponent: 41.06% (G:10.10% B:0.47%)
    Confidence: ±0.015 (+0.397..+0.428) - [98.9%]

    2. Rollout¹ 24/21 eq:+0.389 (-0.023)
    Player: 59.08% (G:15.78% B:0.54%)
    Opponent: 40.92% (G:7.01% B:0.28%)
    Confidence: ±0.013 (+0.376..+0.402) - [1.1%]

    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)
  • From Timothy Chow@21:1/5 to All on Tue Jun 14 08:39:18 2022
    XGID=-a-b--E-CB--cC---cac-b-A-A:0:0:1:53:0:0:0:0:10

    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 O O | | O O X |
    | X O | | O O |
    | X O | | O |
    | | | |
    | | X | |
    | |BAR| |
    | | | X |
    | | | X |
    | O X | | X |
    | O X X | | X O |
    | O X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 159 O: 164 X-O: 0-0
    Cube: 1
    X to play 53

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Thu Jun 16 08:53:56 2022
    XGID=-a-b--E-CB--cC---cac-b-A-A:0:0:1:53:0:0:0:0:10

    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 O O | | O O X |
    | X O | | O O |
    | X O | | O |
    | | | |
    | | X | |
    | |BAR| |
    | | | X |
    | | | X |
    | O X | | X |
    | O X X | | X O |
    | O X X | | X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 159 O: 164 X-O: 0-0
    Cube: 1
    X to play 53

    I find it easy to get hypnotized by the rhythm of an early-game
    blot-hitting contest, but one should always be alert to the
    possibility of a consolidating move that is superior to continuing
    the fight. Magriel would have had little trouble with this play
    decades ago. All his safe/bold criteria point to safety, and this
    roll gives X the option of making the golden point.

    But see also the variant below, where XG says the decision is much
    closer.

    1. Rollout¹ Bar/20 23/20 eq:+0.274
    Player: 57.17% (G:12.08% B:0.43%)
    Opponent: 42.83% (G:8.59% B:0.31%)
    Confidence: ±0.014 (+0.261..+0.288) - [100.0%]

    2. Rollout¹ Bar/22 23/18* eq:+0.176 (-0.098)
    Player: 54.09% (G:15.81% B:0.77%)
    Opponent: 45.91% (G:13.27% B:0.59%)
    Confidence: ±0.019 (+0.157..+0.196) - [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=-a-b-BC-CB--cC---cac-b-A-A:0:0:1:53:0:0:0:0:10

    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 O O | | O O X |
    | X O | | O O |
    | X O | | O |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | O X | | X |
    | O X X | | X X O |
    | O X X | | X X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 157 O: 164 X-O: 0-0
    Cube: 1
    X to play 53

    1. Rollout¹ Bar/22 23/18* eq:+0.688
    Player: 65.14% (G:22.83% B:1.26%)
    Opponent: 34.86% (G:8.15% B:0.33%)
    Confidence: ±0.020 (+0.668..+0.708) - [69.9%]

    2. Rollout¹ Bar/20 23/20 eq:+0.681 (-0.007)
    Player: 67.27% (G:15.01% B:0.65%)
    Opponent: 32.73% (G:6.22% B:0.23%)
    Confidence: ±0.015 (+0.667..+0.696) - [30.1%]

    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)
  • From Timothy Chow@21:1/5 to All on Thu Jun 16 20:55:50 2022
    In case anyone was suspicious of the short rollout I posted for the
    variant, below is a longer (and stronger) rollout.

    On 6/16/2022 8:53 AM, I wrote:
    -------
    Variant
    -------

    XGID=-a-b-BC-CB--cC---cac-b-A-A:0:0:1:53:0:0:0:0:10

    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           O  O |   | O     O     X    |
     | X           O    |   | O     O          |
     | X           O    |   | O                |
     |                  |   |                  |
     |                  | X |                  |
     |                  |BAR|                  |
     |                  |   |                  |
     |                  |   |                  |
     | O           X    |   | X                |
     | O        X  X    |   | X  X     O       |
     | O        X  X    |   | X  X     O     O |
     +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count  X: 157  O: 164 X-O: 0-0
    Cube: 1
    X to play 53

        1. Rollout¹    Bar/22 23/18*                eq:+0.688
          Player:   65.14% (G:22.83% B:1.26%)
          Opponent: 34.86% (G:8.15% B:0.33%)
          Confidence: ±0.020 (+0.668..+0.708) - [69.9%]

        2. Rollout¹    Bar/20 23/20                 eq:+0.681 (-0.007)
          Player:   67.27% (G:15.01% B:0.65%)
          Opponent: 32.73% (G:6.22% B:0.23%)
          Confidence: ±0.015 (+0.667..+0.696) - [30.1%]

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

    XGID=-a-b-BC-CB--cC---cac-b-A-A:0:0:1:53:0:0:0:0:10

    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 O O | | O O X |
    | X O | | O O |
    | X O | | O |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | |
    | O X | | X |
    | O X X | | X X O |
    | O X X | | X X O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 157 O: 164 X-O: 0-0
    Cube: 1
    X to play 53

    1. Rollout¹ Bar/22 23/18* eq:+0.693
    Player: 64.91% (G:22.97% B:1.29%)
    Opponent: 35.09% (G:8.23% B:0.34%)
    Confidence: ±0.010 (+0.683..+0.704) - [71.8%]

    2. Rollout¹ Bar/20 23/20 eq:+0.689 (-0.004)
    Player: 67.37% (G:15.05% B:0.60%)
    Opponent: 32.63% (G:6.17% B:0.21%)
    Confidence: ±0.009 (+0.680..+0.698) - [28.2%]

    ¹ 2540 Games rolled with Variance Reduction.
    Dice Seed: 271828
    Moves: 4-ply, cube decisions: XG Roller+
    Search interval: Large

    eXtreme Gammon Version: 2.19.207.pre-release

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Sun Oct 2 08:23:50 2022
    XGID=-a----EBC-a-bCb--bbe---AA-:0:0:1:43:0:0:0:0:10

    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 O O O | | O X X |
    | X O O O | | O |
    | X | | O |
    | | | O |
    | | | O |
    | |BAR| |
    | | | X |
    | | | X |
    | X | | X |
    | O X X | | X |
    | O O X X | | X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 154 O: 147 X-O: 0-0
    Cube: 1
    X to play 43

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Tue Oct 4 08:40:12 2022
    XGID=-a----EBC-a-bCb--bbe---AA-:0:0:1:43:0:0:0:0:10

    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 O O O | | O X X |
    | X O O O | | O |
    | X | | O |
    | | | O |
    | | | O |
    | |BAR| |
    | | | X |
    | | | X |
    | X | | X |
    | O X X | | X |
    | O O X X | | X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 154 O: 147 X-O: 0-0
    Cube: 1
    X to play 43

    Hitting is tempting, but X has no board, so it doesn't do much other
    than gain some pips. On the other hand, O's position would improve significantly if she were to make her 5pt, so that's an urgent reason
    to make it ourselves when we have the chance. (Having said all that,
    I should say that hitting is XG's play at gammon go.)

    In the variant, X has made his 4pt, which makes hitting relatively
    more attractive.

    1. Rollout¹ 24/20 23/20 eq:+0.065
    Player: 50.35% (G:10.80% B:0.28%)
    Opponent: 49.65% (G:5.73% B:0.24%)
    Confidence: ±0.012 (+0.053..+0.078) - [100.0%]

    2. Rollout¹ 24/20 13/10* eq:-0.045 (-0.111)
    Player: 48.48% (G:14.47% B:0.78%)
    Opponent: 51.52% (G:13.64% B:0.70%)
    Confidence: ±0.015 (-0.061..-0.030) - [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=-a--B-CBC-a-bCb--bbe---AA-:0:0:1:43:0:0:0:0:10

    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 O O O | | O X X |
    | X O O O | | O |
    | X | | O |
    | | | O |
    | | | O |
    | |BAR| |
    | | | |
    | | | |
    | X | | X |
    | O X X | | X X |
    | O O X X | | X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 150 O: 147 X-O: 0-0
    Cube: 1
    X to play 43

    1. Rollout¹ 24/20 13/10* eq:+0.452
    Player: 59.88% (G:21.74% B:1.42%)
    Opponent: 40.12% (G:10.24% B:0.54%)
    Confidence: ±0.008 (+0.444..+0.460) - [69.8%]

    2. Rollout¹ 24/20 23/20 eq:+0.449 (-0.003)
    Player: 59.75% (G:16.87% B:0.45%)
    Opponent: 40.25% (G:5.34% B:0.21%)
    Confidence: ±0.007 (+0.443..+0.456) - [30.2%]

    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)
  • From Timothy Chow@21:1/5 to All on Sun Oct 29 09:50:19 2023
    XGID=-ab-bBDBB-A-aB---abbbbA--A:0:0:1:21:0:0:0:0:10

    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 |
    | X O | | O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X |
    | X X | | X X O O |
    | O X X X | | X X O O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 147 O: 177 X-O: 0-0
    Cube: 1
    X to play 21

    ---
    Tim Chow

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Stick Rice@21:1/5 to Timothy Chow on Sun Oct 29 12:31:55 2023
    On Sunday, October 29, 2023 at 9:50:22 AM UTC-4, Timothy Chow wrote:
    XGID=-ab-bBDBB-A-aB---abbbbA--A:0:0:1:21:0:0:0:0:10

    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 |
    | X O | | O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X |
    | X X | | X X O O |
    | O X X X | | X X O O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 147 O: 177 X-O: 0-0
    Cube: 1
    X to play 21

    ---
    Tim Chow

    You get to hit the checker that steals the most timing from your opponent, definitely hit.

    Stick

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Timothy Chow@21:1/5 to All on Tue Oct 31 09:40:04 2023
    XGID=-ab-bBDBB-A-aB---abbbbA--A:0:0:1:21:0:0:0:0:10

    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 |
    | X O | | O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X |
    | X X | | X X O O |
    | O X X X | | X X O O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 147 O: 177 X-O: 0-0
    Cube: 1
    X to play 21

    Bar/23 already allows X's rearmost checker escape with a 6, so the
    need to step up to the 22pt is less urgent (and the need for an
    anchor is also not urgent because O doesn't have a blitzing structure).
    The decision would be very different if O's outfield blot were on X's
    11pt instead of his 12pt; see variant below.

    1. Rollout¹ Bar/23 13/12* eq:+0.551
    Player: 60.79% (G:28.35% B:2.33%)
    Opponent: 39.21% (G:12.04% B:1.07%)
    Confidence: ±0.024 (+0.527..+0.575) - [100.0%]

    2. Rollout¹ Bar/22 eq:+0.404 (-0.147)
    Player: 58.98% (G:22.10% B:1.51%)
    Opponent: 41.02% (G:11.92% B:0.60%)
    Confidence: ±0.023 (+0.381..+0.427) - [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=-ab-bBDBB-Aa-B---abbbbA--A:0:0:1:21:0:0:0:0:10

    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 |
    | X O | | O O O |
    | | | |
    | | | |
    | | X | |
    | |BAR| |
    | | | |
    | | | X |
    | | | X |
    | X X | | X X O O |
    | O X X X | | X X O O O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 147 O: 178 X-O: 0-0
    Cube: 1
    X to play 21

    1. Rollout¹ Bar/22 eq:+0.488
    Player: 59.97% (G:24.35% B:1.78%)
    Opponent: 40.03% (G:11.18% B:0.63%)
    Confidence: ±0.022 (+0.467..+0.510) - [100.0%]

    2. Rollout¹ Bar/24 13/11* eq:+0.417 (-0.072)
    Player: 58.27% (G:26.96% B:2.19%)
    Opponent: 41.73% (G:13.29% B:1.18%)
    Confidence: ±0.023 (+0.394..+0.440) - [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)