When Left Hand Opponent (LHO) opens the bidding, partner makes an overcall, and Right Hand Opponent (RHO) makes a negative double, then Advancer is in the middle of a complex competitive auction. Traditionally, a redouble in a competitive auction shows a strong hand (10+ points), but with everyone bidding it is not likely that Advancer is too focused on showing values. Instead, we want to design our agreements to let us best describe the most common kinds of hands. In this auction, Advancer having lots of values is not common. Let’s see how using redouble as a conventional bid, called a Rosenkrantz Redouble, can be more effective than this traditional value-showing redouble.