2N = 19+-21
You decide to lead the ♥J, rusinow (agree?). Declarer thinks for awhile and it goes low low low, partner playing the lowest outstanding spot (UDCA).
1) How do you defend?
2) If you're having trouble with #1, here's a similar defensive problem. I tell you that you have the Jx of hearts and 11 other cards outside hearts that you can't see. You have to play a suit. Which suit would you play?