Vulnerable against not, you are South, holding:
RHO opens 1 and it is up to you:
Partner raises to 2. And you?
Try for game.
Partner accepts your try and bids 4. The K is led. What is your plan?
Win the A and play another diamond.
Win the A and play a spade.
Win the A and draw 3 rounds of trump (they split 3-2).
Win the A and play a club to the queen.
Win the A and play a club to the ace and then lead the Q for a ruffing finesse.