• Hit twice?

    From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Thu Jan 25 09:21:24 2024
    From Newsgroup: rec.games.backgammon

    XGID=--a-CaC-BB--cB-b-c-cbB--A-: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 X X |
    | X O O | | O O X |
    | O | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | O | | X X |
    | O X X | | X X |
    | O X X | | X O X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 156 O: 154 X-O: 0-0
    Cube: 1
    X to play 63

    ---
    Tim Chow
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Timothy Chow@tchow12000@yahoo.com to rec.games.backgammon on Sat Jan 27 09:05:51 2024
    From Newsgroup: rec.games.backgammon

    XGID=--a-CaC-BB--cB-b-c-cbB--A-: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 X X |
    | X O O | | O O X |
    | O | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | O | | X X |
    | O X X | | X X |
    | O X X | | X O X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 156 O: 154 X-O: 0-0
    Cube: 1
    X to play 63

    X has ten checkers in the zone, which is often enough to justify a blitz attempt. However, X has only a two-point board, and O's forward position
    has no weaknesses, so it's not that easy for the blitz to succeed. Also,
    X has a strong alternative play of advancing his anchor to O's bar
    point.

    See the variant for a position where attacking is a more viable plan.

    1. Rollout-| 24/18 21/18 eq:-0.087
    Player: 48.00% (G:10.60% B:0.37%)
    Opponent: 52.00% (G:13.01% B:0.51%)
    Confidence: -#0.013 (-0.100..-0.075) - [100.0%]

    2. Rollout-| 8/5* 8/2* eq:-0.229 (-0.142)
    Player: 43.41% (G:16.59% B:0.59%)
    Opponent: 56.59% (G:16.85% B:0.95%)
    Confidence: -#0.019 (-0.248..-0.211) - [0.0%]

    -| 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=--aBCaC-B---cB-b-c-cbB--A-: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 X X |
    | X O O | | O O X |
    | O | | O |
    | | | |
    | | | |
    | |BAR| |
    | | | |
    | | | |
    | O | | X X |
    | O X | | X X X |
    | O X | | X O X X O |
    +12-11-10--9--8--7-------6--5--4--3--2--1-+
    Pip count X: 144 O: 154 X-O: 0-0
    Cube: 1
    X to play 63

    1. Rollout-| 8/5* 8/2* eq:+0.087
    Player: 48.71% (G:24.36% B:0.59%)
    Opponent: 51.29% (G:14.51% B:0.81%)
    Confidence: -#0.010 (+0.077..+0.097) - [99.2%]

    2. Rollout-| 24/18 21/18 eq:+0.070 (-0.017)
    Player: 51.48% (G:15.38% B:0.58%)
    Opponent: 48.52% (G:12.96% B:0.53%)
    Confidence: -#0.010 (+0.060..+0.079) - [0.8%]

    -| 2592 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
    --- Synchronet 3.21b-Linux NewsLink 1.2