Rosenkranz Doubles and Redoubles 


After responder bids over partner's overcall, advancer can make a double or redouble to show at least Ax or Kx in overcaller's suit and about 6 or more points. Note that some players want 

The implications are that a pass, free bid, or any raises deny those holdings (Ax or Kx). 

Examples:
(1C) - 1H - (X:Neg) - ?

xx = at least doubleton heart headed by Ace or King 
p = no possible bid 
free bids = denies the Ace or King of hearts 
heart raises = whatever point counts you've agreed on, but denies the Ace or King of hearts 

(1H) - 1S - (2D) - ?
x = at least doubleton spade headed by Ace or King 
p = no possible bid
free bids = denies the Ace or King of spades
spade raises = denies the Ace or King of spades 


Reverse Rosenkranz Doubles

This is where the meanings of the double and raises are reversed. Thus a double denies the Ace or King, and a raise shows it.