This is a hand where West was one of my favorite gold stars, EAST is a new player to me. The golden buy lead the ♥K which won.
On defense, ask yourself a couple of question. Like how many ♥ does partner have? If he had six headed by KQ(J)... he likely would have opened a weak two. So he has either 4 (yes people overcall on four card suits) or 5 (which is more likely number). Here EAST, grabbed the second (and last) ♥ trick for his side. The question now becomes how best to continue. In fact, EAST didn't know what to do after winning this trick. The problem was, he has no clear defensive plan. Better would be to allow his partner to win the trick if he was unsure.
What would you do? Think about this before reading on (if it had been me, I would have let my gold star player win, they usually know how to continue... :-)
Ok, so EAST grabs the second trick. How many ♦ does declarer have? Surely not less than 6 and probably 7 (at most 8). Should you return a ♥, ♣, ♠ or ♦?
Your partner can't have much more. If he has no black Ace, they will likely win 7♦, 2♣ 2♠ (with the aid of a ♠ hook. Even if South has only 6♦ your spade spot suggest your partner's ♠T or 9 will be fall setting up a third ♠ in the form of dummy;s eight. So partner will need a black ace to beat this. But if he has a black ACE, he will be out of others honors. Do you return a safe ♦ or try to guess his ace?
The danger hand is if partner has the ♠A. If so, declarer will have ♣AQ, and your ♣JACK is falling on the third round. The danger on a ♦ or ♣ back is NS will win 7♦ and 4♣. But if partner has the ♣ACe, a ♠ back, even away from the King with QJ in dummy can not give up the hand if partner has the ♣ACE. So the right play is low ♠. You will quickly cash two ♠ for down two and a win of 6 imps. Any return other than a ♠ cost you 6.5 imps and the chance to empress a very fine gold star player.... :-)
Sad story, EAST returned a trump. Note if he ducks the ♥Q, the gold star will cash his black ace (this time the ♠ to assure 1 trick set, and EAST can flag high for a second ♠ for the same down two. The hands were...
Ben
P - P - P - 1♦
1♥-X - 2♥-4♦
P - 5♦- all pass
T1. ♥K-2-7-T
T2. ♥Q-3-A-5