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A good test position for XG3 beta?

Posted By: Timothy Chow
Date: Tuesday, 12 August 2014, at 3:52 p.m.

Below is a variant of a reference position that I learned from Mochy. XGR+ rates White's chances significantly more pessimistically than the 4-ply/4-ply rollout below suggests. I suspect that even the 4-ply/4-ply rollout isn't making the most of White's containment chances.

I hear that XG3 beta is supposed to be significantly better than XG2 at containment. Perhaps someone with access to XG3 beta will be interested in doing a high-level rollout of the position below? I'm guessing that its verdict will be that White can take.





White is Player 2

score: 0
pip: 166
Unlimited Game
pip: 32
score: 0

Blue is Player 1
XGID=-Ga---aa----d----c-e-----A:1:1:1:00:0:0:0:0:10
Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take
Player Winning Chances: 64.05% (G:36.62% B:1.25%) 63.97% (G:36.42% B:1.25%)
Opponent Winning Chances: 35.95% (G:0.00% B:0.00%) 36.03% (G:0.00% B:0.00%)
Cubeless Equities +0.660 +1.312
Cubeful Equities
No redouble:+0.897 (-0.103)±0.007 (+0.890..+0.904)
Redouble/Take:+1.023 (+0.023)±0.009 (+1.014..+1.032)
Redouble/Pass:+1.000
Best Cube action: Redouble / Pass
Rollout details
2592 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves and cube decisions: 4-ply
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 3 hours 48 minutes

eXtreme Gammon Version: 2.10

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