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Advanced Backgammon #68 -- Rollout and Variants

Posted By: Igor
Date: Wednesday, 2 April 2014, at 3:00 p.m.

In Response To: Advanced Backgammon #68 (Igor)

White has ten checkers in the zone and a three and a half point board. Since we are ahead in the race, we should be looking to minimize shots. The safest move is 14/8 3/2, suggested by Mike, but the stack on our 6pt begs development. So, 14/8 6/5 it is as it triplicates ones and duplicates fours. Making the five point is almost a blunder here.

		White is Player 2 score: 0 pip: 133 Unlimited Game Jacoby Beaver pip: 106 score: 0 Blue is Player 1
XGID=-ABAa-Fb---BbBA--a-bdab---:0:0:1:61:0:0:3:0:10
Blue to play 61

1.	Rollout1	14/8 6/5	eq: -0.163
	Player: Opponent: 45.77% (G:11.65% B:0.38%) 54.23% (G:19.57% B:0.83%) Conf.: ± 0.008 (-0.171...-0.154) - [100.0%] Duration: 4 minutes 47 seconds
2.	Rollout1	14/8 2/1	eq: -0.188 (-0.025)
	Player: Opponent: 45.37% (G:11.82% B:0.47%) 54.63% (G:17.27% B:0.60%) Conf.: ± 0.008 (-0.196...-0.180) - [0.0%] Duration: 4 minutes 41 seconds
3.	Rollout2	14/8 3/2	eq: -0.217 (-0.054)
	Player: Opponent: 44.17% (G:11.59% B:0.47%) 55.83% (G:17.45% B:0.53%) Conf.: ± 0.011 (-0.228...-0.206) - [0.0%] Duration: 2 minutes 28 seconds
4.	Rollout2	11/5 6/5	eq: -0.237 (-0.074)
	Player: Opponent: 43.94% (G:15.64% B:0.94%) 56.06% (G:20.95% B:1.03%) Conf.: ± 0.010 (-0.247...-0.227) - [0.0%] Duration: 2 minutes 03 seconds
1 2592 Games rolled with Variance Reduction. Dice Seed: 13905256 Moves: 3-ply, cube decisions: XG Roller 2 1296 Games rolled with Variance Reduction. Dice Seed: 13905256 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Add another covering number for white and making the 5pt is now tied with the safer play.

		White is Player 2 score: 0 pip: 134 Unlimited Game Jacoby Beaver pip: 106 score: 0 Blue is Player 1
XGID=-ABAa-Fb---BbBA--a-ccab---:0:0:1:61:0:0:3:0:10
Blue to play 61

1.	Rollout1	11/5 6/5	eq: -0.283
	Player: Opponent: 42.14% (G:15.24% B:0.88%) 57.86% (G:22.52% B:1.12%) Conf.: ± 0.002 (-0.285...-0.281) - [86.2%] Duration: 2 hours 19 minutes
2.	Rollout1	14/8 6/5	eq: -0.284 (-0.001)
	Player: Opponent: 42.10% (G:10.36% B:0.37%) 57.90% (G:21.71% B:0.90%) Conf.: ± 0.002 (-0.286...-0.283) - [13.8%] Duration: 2 hours 26 minutes
3.	Rollout2	14/8 2/1	eq: -0.315 (-0.032)
	Player: Opponent: 42.20% (G:10.48% B:0.36%) 57.80% (G:18.90% B:0.61%) Conf.: ± 0.016 (-0.331...-0.299) - [0.0%] Duration: 2 minutes 19 seconds
4.	Rollout2	14/8 3/2	eq: -0.354 (-0.071)
	Player: Opponent: 40.43% (G:10.35% B:0.39%) 59.57% (G:19.46% B:0.56%) Conf.: ± 0.011 (-0.366...-0.343) - [0.0%] Duration: 2 minutes 18 seconds
1 46656 Games rolled with Variance Reduction. Dice Seed: 35994417 Moves: 3-ply, cube decisions: XG Roller 2 1296 Games rolled with Variance Reduction. Dice Seed: 35994417 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Change a covering number from the four to the five and 11pt is best left intact.

		White is Player 2 score: 0 pip: 135 Unlimited Game Jacoby Beaver pip: 106 score: 0 Blue is Player 1
XGID=-ABAa-Fb---BbBA-a--ccab---:0:0:1:61:0:0:3:0:10
Blue to play 61

1.	Rollout1	14/8 6/5	eq: -0.290
	Player: Opponent: 42.06% (G:10.02% B:0.33%) 57.94% (G:20.84% B:0.80%) Conf.: ± 0.008 (-0.298...-0.281) - [100.0%] Duration: 4 minutes 34 seconds
2.	Rollout1	14/8 2/1	eq: -0.310 (-0.020)
	Player: Opponent: 42.05% (G:9.95% B:0.32%) 57.95% (G:18.46% B:0.57%) Conf.: ± 0.008 (-0.318...-0.301) - [0.0%] Duration: 4 minutes 41 seconds
3.	Rollout2	11/5 6/5	eq: -0.345 (-0.056)
	Player: Opponent: 40.65% (G:14.66% B:0.92%) 59.35% (G:23.23% B:0.98%) Conf.: ± 0.013 (-0.358...-0.332) - [0.0%] Duration: 2 minutes 00 second
1 2592 Games rolled with Variance Reduction. Dice Seed: 67781547 Moves: 3-ply, cube decisions: XG Roller 2 1296 Games rolled with Variance Reduction. Dice Seed: 67781547 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Messages In This Thread

• Advanced Backgammon #68
  Igor -- Monday, 31 March 2014, at 3:34 p.m.
  • Advanced Backgammon #68
    Seth -- Monday, 31 March 2014, at 3:45 p.m.
  • Advanced Backgammon #68
    Stick -- Monday, 31 March 2014, at 4:13 p.m.
    • Advanced Backgammon #68
      Seth -- Monday, 31 March 2014, at 6:33 p.m.
      • Advanced Backgammon #68
        neilkaz -- Monday, 31 March 2014, at 7:15 p.m.
  • Advanced Backgammon #68
    Fatboy -- Monday, 31 March 2014, at 5:27 p.m.
  • Advanced Backgammon #68
    Taper_Mike -- Wednesday, 2 April 2014, at 3:36 a.m.
    • Nactations in the Near Family
      Taper_Mike -- Thursday, 3 April 2014, at 1:24 a.m.
  • Advanced Backgammon #68 -- Rollout and Variants
    Igor -- Wednesday, 2 April 2014, at 3:00 p.m.
    • Advanced Backgammon #68 -- Rollout and Variants
      David Presser -- Wednesday, 2 April 2014, at 5:13 p.m.
      • Advanced Backgammon #68 -- Rollout and Variants
        Igor -- Wednesday, 2 April 2014, at 5:49 p.m.