Here we look at a modern expert treatment in 2/1 GF auctions which uses a 2NT rebid like the rebid of a suit — showing a 6+card suit. Let’s see how it work and how it helps redefine our bidding structure.
When we open a NT and partner uses an artificial conventional responses, like Stayman or Transfers, then the opponents might double as lead directing. We want to use this double against them. Here we discuss our options for bidding after this double.