FIBS Board backgammon forum

ah_clem rolled 4-3 and took two off, herd now has a good running roll - so how to get the best out of it...

There are many permutations here, so let me know if another grabs your fancy - I will add it, as long as you explain why.

(http://www.fibsboard.com/fibsboard-forum-match-11/game-4-move-24-herd-4-4/?action=dlattach;attach=7031;image)

The vote was split for this one, with no clear favourite.The Herd therefore played my favourite move  ;)

I liked 19/15, 18/6 - as it gave the most cross overs [transitions?] of the options. This is important right now as the rush is on to not be gammoned!

That's only three crossovers, and there are many moves that give four crossovers.  Nonetheless, I think 19/15, 18/6 is correct - when trying to run off a gammon you should bear in to the six point if you can, otherwise make moves in the outfield.   18/6 plays a checker to the six, and 19/15 is best for diversification.

It would be interesting to see a rollout.

Quote from: ah_clem on November 14, 2011, 12:53:13 AM
That's only three crossovers, and there are many moves that give four crossovers.  Nonetheless, I think 19/15, 18/6 is correct - when trying to run off a gammon you should bear in to the six point if you can, otherwise make moves in the outfield.   18/6 plays a checker to the six, and 19/15 is best for diversification.

It would be interesting to see a rollout.

Hmm, so it is..I counted four, several times  ;) I still prefer that move, even if it is for the wrong reasons!

Will roll it out when I get home.

Here ya go...


1. Rollout          19/15 18/6                   Eq.:  -2.075
       0.000 0.000 0.000 - 1.000 0.699 0.000 CL  -2.075 CF  -2.075
      [0.000 0.000 0.000 - 0.000 0.001 0.000 CL   0.002 CF   0.002]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 932666080 and quasi-random dice
        Play: world class 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]
    2. Rollout          19/11 18/10                  Eq.:  -2.096 ( -0.020)
       0.000 0.000 0.000 - 1.000 0.712 0.000 CL  -2.096 CF  -2.096
      [0.000 0.000 0.000 - 0.000 0.002 0.000 CL   0.002 CF   0.002]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 932666080 and quasi-random dice
        Play: world class 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]
    3. Rollout          18/6 7/3                     Eq.:  -2.107 ( -0.031)
       0.000 0.000 0.000 - 1.000 0.719 0.000 CL  -2.107 CF  -2.107
      [0.000 0.000 0.000 - 0.000 0.001 0.000 CL   0.002 CF   0.002]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 932666080 and quasi-random dice
        Play: world class 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]
    4. Rollout          18/6 8/4                     Eq.:  -2.109 ( -0.034)
       0.000 0.000 0.000 - 1.000 0.721 0.000 CL  -2.109 CF  -2.109
      [0.000 0.000 0.000 - 0.000 0.001 0.000 CL   0.002 CF   0.002]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 932666080 and quasi-random dice
        Play: world class 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]