Pam Livingston played this hand recently against the robots on BBO. Her (robot) partner bid clubs twice but left her in 3NT. West is about to lay down their opening lead. What would you expect North to have?
When your partner opens 1NT, you know almost exactly what kind of hand he holds. It is one of only 3 possible shapes: 4333, 4432 or 5332 - the balanced hands. And it sits in a very narrow point range: 12-14 if you are playing Acol; or 15-17 if you are playing Standard American.