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Backgammon => Fibsboard Forum Matches => FFM 6 => Topic started by: diane on August 19, 2010, 08:44:22 AM

Poll
Question: Move?
Option 1: 13/10, 13/9 votes: 0
Option 2: 10/6, 10/7 votes: 2
Option 3: 10/3 votes: 0
Option 4: 10/6, 7/4 votes: 5
Option 5: 7/4, 7/3 votes: 0
Title: Game 2, move 6: Herd 3-4
Post by: diane on August 19, 2010, 08:44:22 AM
hrcjBwAz2xgDBA:cAmuAAAAEAAA

(http://www.fibsboard.com/fibsboard-forum-match-6/game-2-move-6-herd-3-4/?action=dlattach;attach=4935;image)
Title: Re: Game 2, move 6: Herd 3-4
Post by: PersianLord on August 19, 2010, 01:00:23 PM
Spoiler
10/6-7/4
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Title: Re: Game 2, move 6: Herd 3-4
Post by: ah_clem on August 19, 2010, 01:34:13 PM
Spoiler

It's between moving both checkers off the ten point and moving one of them and slotting the 4 point with the other.

The two moves are probably pretty close, but I see leaving a blot in our homeboard as an invitation to hit loose.  So I'll play 10/7 10/6.
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Title: Re: Game 2, move 6: Herd 3-4
Post by: stog on August 19, 2010, 05:43:08 PM
Spoiler
let him hit loose if he wants! 10/6 7/4
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Title: Re: Game 2, move 6: Herd 3-4
Post by: ah_clem on August 20, 2010, 01:09:21 PM
rollout

Spoiler

Slotting the four point is best here.  Evaluation has the other move as a .008 error, while 0-ply rollout pegs it as .03.





EVALUATION:
    1. Cubeful 2-ply    10/6 7/4                     Eq.:  +0.007
       0.504 0.047 0.001 - 0.496 0.046 0.002
    2. Cubeful 2-ply    13/10 13/9                   Eq.:  -0.001 ( -0.008)
       0.498 0.039 0.000 - 0.502 0.035 0.000
    3. Cubeful 2-ply    10/7 10/6                    Eq.:  -0.004 ( -0.011)
       0.499 0.042 0.000 - 0.501 0.040 0.001
        2-ply cubeful prune [world class]

ROLLOUT:

    1. Rollout          10/6 7/4                     Eq.:  +0.028
       0.505 0.047 0.001 - 0.495 0.044 0.002 CL  +0.017 CF  +0.028
      [0.001 0.001 0.000 - 0.001 0.001 0.000 CL   0.003 CF   0.006]

    2. Rollout          10/7 10/6                    Eq.:  -0.004 ( -0.032)
       0.496 0.041 0.001 - 0.504 0.040 0.001 CL  -0.006 CF  -0.004
      [0.001 0.001 0.001 - 0.001 0.001 0.000 CL   0.003 CF   0.006]

    3. Rollout          13/10 13/9                   Eq.:  -0.054 ( -0.082)
       0.483 0.040 0.000 - 0.517 0.037 0.001 CL  -0.027 CF  -0.054
      [0.001 0.001 0.001 - 0.001 0.001 0.000 CL   0.003 CF   0.007]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 894086436 and quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 0-ply cubeful prune [expert]



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