In many auctions it will be clear that a 4NT bid is Blackwood, or perhaps Roman Keycard Blackwood if that is what you play. However, there are some auctions in which 4NT has a quite different meaning. We will take a look at some situations in this quiz.
You will be South throughout the quiz. If you think 4NT is Blackwood on a problem, use Roman Key card responses: 5♣ = 1 or 4 key cards, 5♦ - 0 or 3 keycards, 5♥ = 2 keycards, 5♠ = 2 keycards plus the queen of trumps. (Note that the king of trumps is a keycard).