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A couple of variants of Michael Depreli's six-prime position

Posted By: Timothy Chow
Date: Monday, 29 December 2014, at 12:26 a.m.

Here are a couple of variants of Michael's position that illustrate what it takes to make 7/5(2) a contender.

		White is Player 2 score: 0 pip: 134 Unlimited Game pip: 135 score: 0 Blue is Player 1
XGID=b--BB-BCB---AA--bbbcbb-AA-:1:1:1:11:0:0:0:0:10
Blue to play 11

1.	Rollout1	7/5(2)	eq: -0.135
	Player: Opponent: 39.19% (G:11.83% B:0.76%) 60.81% (G:17.17% B:0.84%) Conf.: ± 0.012 (-0.147...-0.123) - [99.9%] Duration: 10 minutes 12 seconds
2.	Rollout1	24/22 23/22 12/11	eq: -0.164 (-0.029)
	Player: Opponent: 37.42% (G:9.72% B:0.46%) 62.58% (G:13.26% B:0.44%) Conf.: ± 0.012 (-0.176...-0.151) - [0.1%] Duration: 10 minutes 28 seconds
1 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

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This rollout isn't really finished but you get the general idea.

		White is Player 2 score: 0 pip: 140 Unlimited Game pip: 136 score: 0 Blue is Player 1
XGID=b--BB-BCB----aAAbbbbbbB---:1:1:1:11:0:0:0:0:10
Blue to play 11

1.	Rollout1	14/13* 13/11 7/6	eq: -0.200
	Player: Opponent: 36.24% (G:12.47% B:1.00%) 63.76% (G:17.25% B:0.62%) Conf.: ± 0.007 (-0.207...-0.192) - [54.7%] Duration: 45 minutes 12 seconds
2.	Rollout1	15/13* 13/11	eq: -0.201 (-0.001)
	Player: Opponent: 36.29% (G:12.29% B:1.00%) 63.71% (G:17.60% B:0.65%) Conf.: ± 0.007 (-0.207...-0.194) - [40.8%] Duration: 45 minutes 54 seconds
3.	Rollout2	14/13* 13/12 7/5	eq: -0.210 (-0.011)
	Player: Opponent: 36.06% (G:12.17% B:0.92%) 63.94% (G:18.24% B:0.76%) Conf.: ± 0.013 (-0.223...-0.197) - [4.4%] Duration: 11 minutes 50 seconds
4.	Rollout1	7/5(2)	eq: -0.213 (-0.013)
	Player: Opponent: 35.88% (G:11.55% B:0.88%) 64.12% (G:16.83% B:0.63%) Conf.: ± 0.007 (-0.220...-0.206) - [0.1%] Duration: 39 minutes 55 seconds
1 5184 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller 2 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10