As is typical with online junior bridge (I think things are much more sane f2f), we had an interesting auction. I was the joker East. (If that was given in the problem, I'm sure it would have changed the choice for many of you.) I was trying to test out Rosenberg's theory of opening 1NT and then carrying through on the psyche. That is to say, not passing a forcing bid.
I can understand why North bid the way he did. It's not easy to show his big hand. I thought South's pass was almost as crazy as my 1NT opening. They ended up gaining 1.5 imps though as 500 was better than their game.

Help

(1NT!) - P - (2♣) - P!
(2♥) - P - (3♥) - X
(P) - P! - (P)