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5a7a recube action rollout

Posted By: Timothy Chow
Date: Friday, 11 February 2011, at 12:14 a.m.

In Response To: 5a7a recube action (Timothy Chow)

This one confused me. At first glance I thought it was a clear money take, but then I tried to visualize how the game would play out and I saw that Blue had plenty of time to escape, so it looked like a big drop for money. ATS I wasn't sure whether White could take, so according to Woolsey it had to be a redouble.

The rollout, however, says that it's either ND/T or TG/T. Seems a little surprising to me; maybe XG is incorrectly taking drops next turn?

By the way, I'm wondering whether XG's reporting of the "Double Decision confidence" as 63.3% is the "right" number to report here. It's true that XG is uncertain whether it's ND or TG, but given that it's a take, it seems more logical to me for XG to say that it's 100.0% confident that Blue should not double.





White is Player 1

score: 0
pip: 126
7 point match
pip: 117
score: 2

Blue is Player 2
XGID=baBBBBBA---A-A----bbbbbBb-:1:1:1:00:2:0:0:7:10
Blue on roll, cube action?


Analyzed in Rollout
No Double
Player Winning Chances: 78.02% (G: 40.41% B: 3.55%)
Opponent Winning Chances: 21.98% (G: 4.23% B: 0.18%)
Double/Take
Player Winning Chances: 77.73% (G: 40.31% B: 7.09%)
Opponent Winning Chances: 22.27% (G: 4.26% B: 0.22%)
Cubeless Equities
No Redouble:+0.980
Redouble:+1.331
Cubeful Equities
No Redouble:+0.999
Redouble/Take:+0.957 (-0.042)
Redouble/Drop:+1.000 (+0.001)
Best Cube action: No Redouble / Take
Rollout details
5184 Games rolled with Variance Reduction.
Dice Seed: 2
Moves and cube decisions: 3 ply
Confidence No Redouble: ± 0.006 (+0.992...+1.005)
Confidence Redouble: ± 0.011 (+0.945...+0.968)
Double Decision confidence: 63.3%
Take Decision confidence: 100.0%
Duration: 4 hours 27 minutes

eXtreme Gammon Version: 1.21, MET: Rockwell-Kazaross

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