Declarer arrived in 3NT after a 1NT-3NT auction. Partner leads the 3 and dummy plays low. What is your plan?
DUMMY
85 KQ3 AJ106 QJ43
YOU
AQ10 J8765 54 A86
Queen. If you play the ace and then the queen, declarer can (and will) successfully hold up. When you play the queen, he has to win (not knowing you have the ace). When clubs are played, you will win and take 4 spade tricks for down 1.
Full deal: