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Cube Action AtS

Posted By: David Rockwell
Date: Tuesday, 7 July 2015, at 3:59 p.m.

In Response To: Cube Action AtS (David Rockwell)

Extreme Gammon told me that I screwed the pooch not only on this position, but on six other similar positions as I hit loose and recirculated checkers through the outfield. Most of the critical discussion points have been covered in the comments. What I evaluated incorrectly similar to others here is the surprisingly low cube efficiency on a recube to eight. At the board, my evaluation was that my opponent had an immediate recube to eight if I didn't make a full prime. I translated this to a take point close to the fully live take point of approximately 13%. As Bob Koca explains to us, that just isn't correct. The rollout shows the position as very close to a drop despite winning over 17%. I must admit, I am still baffled by the distance between these two numbers.





White is Player 2

score: 1
pip: 47
11 point match
pip: 120
score: 6

Blue is Player 1
XGID=--aBBBB-B---BB----A---cdg-:1:1:1:00:6:1:0:11:10
Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take
Player Winning Chances: 82.930% (G:4.129% B:0.092%) 83.330% (G:3.343% B:0.063%)
Opponent Winning Chances: 17.070% (G:3.171% B:0.034%) 16.670% (G:3.075% B:0.034%)
Cubeless Equities +0.6598 +1.1551
Cubeful Equities
No redouble:+0.8753 (-0.0465)±0.0041 (+0.8712..+0.8794)
Redouble/Take:+0.9218±0.0060 (+0.9157..+0.9278)
Redouble/Pass:+1.0000 (+0.0782)
Best Cube action: Redouble / Take
Rollout details
5184 Games rolled with Variance Reduction.
Dice Seed: 47555033
Moves: 3-ply, cube decisions: XG Roller+
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 49 minutes 10 seconds

eXtreme Gammon Version: 2.10, MET: Rockwell-Kazaross

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