Rosenkranz redouble
Encyclopedia
The Rosenkranz double
Rosenkranz double
The Rosenkranz double and Rosenkranz redouble are elements of a bridge bidding convention invented by Dr. George Rosenkranz, collectively known as the Rosenkranz double...

and Rosenkranz redouble are elements of a bridge
Contract bridge
Contract bridge, usually known simply as bridge, is a trick-taking card game using a standard deck of 52 playing cards played by four players in two competing partnerships with partners sitting opposite each other around a small table...

 bidding convention
Bridge convention
A bridge convention is a system of calls made during the auction phase of a contract bridge game which conveys a coded meaning about the players' card holdings...

 invented by Dr. George Rosenkranz
George Rosenkranz
George Rosenkranz is a Mexican scientist in steroid research and a professional bridge player. He was born in Hungary, educated in Switzerland and lived in Mexico for 66 years...

, collectively known as the Rosenkranz double
Rosenkranz double
The Rosenkranz double and Rosenkranz redouble are elements of a bridge bidding convention invented by Dr. George Rosenkranz, collectively known as the Rosenkranz double...

. The calls are made by the partner of an overcaller (the advancer) to describe his top honor card holdings in the overcaller’s suit.
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