BGonline.org Forums

Double/Double--A New Variation

Posted By: Stein Kulseth
Date: Saturday, 14 September 2013, at 5:39 p.m.

In Response To: Double/Double--A New Variation (Bob Koca)

Cube action in double/double for checker on 1 and 4 vs 2 on ace.

Double/Drop
Doubler's equity is oviously +2 (1 point each cube)
No double
Again obvious, same as cubeless, 29 ways to win, 22/36 * 2 = +1.22
Double/Take/Opt. take
A 4, 5 or 6 leaves the doubler gin, and the taker with an obvious 2nd cube drop, contributing 3/6 * 3 = +1.5 to the doubler's equity.
An ace leaves the doubler even money to get off - the taker has an obvious take - and the variation is a wash, contributing +0 equity.
After a 2 or 3, the doubler needs to roll a matching number to get off or he loses. He is only 1/6 to do so, and the 1st cube contributes 2/6 * (-4/6) * 2 = -0.44. On the 2nd cube the taker has a proper beaver which the doubler has to drop, contributing 2/6 * (-2) = -0.67, leaving him with a total equity of 0.39

Thus the correct action is No double/take, the doubler needing his opponent to err and drop some 56% to make the double worth it.

Post Response

Subject:
Message: