Last quiz winner:Frank O'Sullivan.Well done Frank!
You are EAST. Partner leads the ♦Q. What is your plan?
Thanks to: Mr Bridge and Julian Pottage, Bridge Magazine.
The lead of the queen shows Q-J-10 or Q-J-9. Since you can see the nine in dummy, it must be the former. You should overtake with the king and, if it holds, continue the suit. Keeping the king would lead to a blockage if declarer takes the ace on the first or third round.