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Rollout and variant

Posted By: Timothy Chow
Date: Saturday, 4 March 2017, at 1:06 a.m.

In Response To: What does it mean to "see red"? (Timothy Chow)

This position has a nice variant that shows that the decision is not just a strategic one but is sensitive to tactical considerations.

The choice of which hit is also interesting. Breaking anchor does run a slightly higher risk of losing a gammon. However, 22/13* gives fewer return shots. Also White's position poses more of a priming threat than an attacking threat, so that points towards keeping the back checkers spread out.

		White is Player 2 score: 0 pip: 164 Unlimited Game pip: 148 score: 0 Blue is Player 1
XGID=-bB-aDD--A--baa--b-bbbBAA-:0:0:1:54:0:0:0:0:10
Blue to play 54

1.	Rollout1	23/18 22/18	eq: -0.328
	Player: Opponent: 41.56% (G:15.68% B:1.04%) 58.44% (G:20.53% B:1.07%) Conf.: ± 0.018 (-0.346...-0.310) - [100.0%] Duration: 20 minutes 18 seconds
2.	Rollout1	22/13*	eq: -0.418 (-0.089)
	Player: Opponent: 37.37% (G:18.84% B:3.15%) 62.63% (G:23.15% B:1.70%) Conf.: ± 0.020 (-0.438...-0.397) - [0.0%] Duration: 20 minutes 28 seconds
3.	Rollout1	23/14*	eq: -0.436 (-0.108)
	Player: Opponent: 36.28% (G:18.00% B:2.82%) 63.72% (G:21.78% B:1.24%) Conf.: ± 0.017 (-0.454...-0.419) - [0.0%] Duration: 19 minutes 04 seconds
1 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.208.pre-release

---

Variant:

		White is Player 2 score: 0 pip: 164 Unlimited Game pip: 147 score: 0 Blue is Player 1
XGID=-bB-aDD-A---baa--b-bbbBAA-:0:0:1:54:0:0:0:0:10
Blue to play 54

1.	Rollout1	22/13*	eq: -0.330
	Player: Opponent: 38.61% (G:20.11% B:3.31%) 61.39% (G:22.29% B:1.56%) Conf.: ± 0.017 (-0.348...-0.313) - [77.5%] Duration: 21 minutes 07 seconds
2.	Rollout1	23/18 22/18	eq: -0.340 (-0.010)
	Player: Opponent: 41.36% (G:16.00% B:1.35%) 58.64% (G:21.87% B:1.10%) Conf.: ± 0.018 (-0.358...-0.322) - [22.5%] Duration: 19 minutes 51 seconds
3.	Rollout1	23/14*	eq: -0.402 (-0.072)
	Player: Opponent: 37.20% (G:18.96% B:3.14%) 62.80% (G:21.56% B:1.25%) Conf.: ± 0.017 (-0.419...-0.385) - [0.0%] Duration: 19 minutes 19 seconds
1 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.208.pre-release

Messages In This Thread

• What does it mean to "see red"?
  Timothy Chow -- Friday, 3 March 2017, at 12:57 a.m.
  • What does it mean to "see red"?
    Igor -- Friday, 3 March 2017, at 1:15 a.m.
  • What does it mean to "see red"?
    Karol Szczerek -- Friday, 3 March 2017, at 8:59 a.m.
  • What does it mean to "see red"?
    Chuck Bower -- Friday, 3 March 2017, at 5:14 p.m.
  • What does it mean to "see red"?
    neilkaz -- Friday, 3 March 2017, at 8:29 p.m.
  • Rollout and variant
    Timothy Chow -- Saturday, 4 March 2017, at 1:06 a.m.
  • What does it mean to "see red"?
    ah_clem -- Monday, 6 March 2017, at 9:00 p.m.