The Rosenkranz Double is used when your LHO (left-hand opponent) opens the bidding, partner makes an overcall, and RHO (right-hand opponent) also bids. A double is artificial, showing 3-card support for partner’s suit with at least one of the top three honors.
|
(1) Rosenkranz double, showing 3-card spade support with a top spade honor. |
K73
83
KQ93
T873
In contrast, a simple raise of partner’s suit denies a top honor in that suit. For example:
|
(1) Rosenkranz, showing a 3-card diamond raise without a top diamond honor. |
Rosenkranz doubles are used through the 2-level. The choice must exist to either (re)double or raise partner’s suit to the 2-level.
Both the direct raise and the double show 6-10 points. A stronger hand with support must cuebid instead to show 10+ points.
The Rosenkranz double is named for inventor George Rosenkranz, a preeminent Mexican expert. The purpose of the convention is to help partner on defense should the opponents win the auction.
Examples…Click here to continue reading