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MC Semi-Final Key Doubling Decision

Posted By: Chris Bray
Date: Thursday, 21 July 2011, at 11:01 a.m.

Whenever you lose a match there is nearly always a doubling decision you regret. In Paul Weaver's case it may well be when he dropped Fabio Gullota's double when Paul was leading 21-19.

is Paul Weaver

score: 21
pip: 159
23 point match
pip: 166
score: 19

is Fabio Gullota
XGID=aaABB-B-a---cD--Ab-e-bA-B-:0:0:1:00:19:21:0:23:10
on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 54.37% (G:22.10% B:2.38%) 54.85% (G:22.31% B:3.66%)
Opponent Winning Chances: 45.63% (G:17.68% B:3.86%) 45.15% (G:18.64% B:4.44%)
Cubeless Equities +0.026 +0.863
Cubeful Equities
No double:+0.640 (-0.223)±0.012 (+0.628..+0.652)
Double/Take:+0.863±0.015 (+0.848..+0.878)
Double/Pass:+1.000 (+0.137)
Best Cube action: Double / Take
Rollout details
2592 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 1 hour 11 minutes

eXtreme Gammon Version: 2.00, MET: Kazaross XG2

XG2 has this a clear take and I think that was the view of most of those watching yesterday afternnon. Yes its scary but PG only has a three point board and limited checkers in the attack zone. Despite the efficiency of the double due to the score dropping is a 0.137 error.

For money this position is no double/beaver.

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