When partner opens the bidding 2NT then we have far less space to investigate for a major suit fit. It is important that we make good use of our limited space below 3NT in order to determine if we have a Major suit fit.
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.
When we open the bidding with NT one of partners favorite bidding tools is the Jacoby Transfer. When partner transfers to a major suit and we have an excellent fit we have to decide about super-accepting. Here we look at our options for what to do and how to use our judgment about doing so.
Bidding slam is extremely difficult after partner opens the bidding 2NT — much of our valuable bidding space had been taken away. This is especially true when it comes to finding minor suit slams. But we do have some gadgets that are designed to help us do this.