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Rollout: Double jump 1

Posted By: Timothy Chow
Date: Wednesday, 30 October 2019, at 10:23 p.m.

In Response To: Double jump 1 (Timothy Chow)





White is Player 1

score: 0
pip: 77
Unlimited Game
pip: 88
score: 0

Blue is Player 2
XGID=-BBBCBB-----b-----bbcBabc-:0:0:1:54:0:0:0:0:10
Blue to play 54

1.Rollout121/17 21/16eq: -0.466
Player:
Opponent:		34.56% (G:3.74% B:0.13%)
65.44% (G:4.40% B:0.06%)		Conf.: ± 0.009 (-0.475...-0.457) - [100.0%]
Duration: 2 minutes 00 second
2.Rollout16/2 6/1eq: -0.595 (-0.129)
Player:
Opponent:		32.67% (G:1.29% B:0.02%)
67.33% (G:3.82% B:0.07%)		Conf.: ± 0.006 (-0.601...-0.589) - [0.0%]
Duration: 1 minute 46 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.207.pre-release

This position arose in a match between Falafel and MCG at NYMO 2016. MCG played 6/2 6/1, which XG hates. As I said, I have no magic formula for these sorts of position and I think one may just have to study many examples and develop a feel for them. Certainly it's important that the race is close and that if Blue breaks his board then a hit doesn't necessarily win instantly.

By the way, in Hickey and Storer's "Game Plan" book, there is at least one discussion of the "dangerous double jump."

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