I got a phone call today. "How do you play 11 spades missing the queen-deuce?"
"Um, I'd play for the drop? Ha ha"
Wrong answer, actually.
Playing in a club game, a friend was in 4♠ with this layout:
Dummy: ♠A J 9 8 5
You: ♠K 10 7 6 4 3
You lead a spade towards dummy and left-hand opponent shows out. You win the ace and lead another and right-hand opponent shows out.
What do you play and why?
First, you have to figure out who revoked. I think it's likely that RHO did as she didn't ask "No spades?" when her partner showed out when you first led the suit, something she might do if she had a singleton. If RHO has the ♠Q, you need to put in the 10.
If, instead, you played the ♠K, then RHO would win a trick subsequently, the Director would give you one trick, and you would be back to even. If you play the 10, then the king, you could make RHO follow with the ♠Q, but still get an extra trick later.
You need a flow chart to be able to figure out the penalty for a revoke. The ACBL has an article that explains all the latest rules and you can read about it here.
Thanks to Xwing for the story.