Take the East seat.  You follow to the J with the 3. Declarer wins the Q and leads the 5, six from West. Alas, you can't withhold your ace. What will you play next, and why?

Neither side vulnerable South deals

J 9 6 4 8 4 3 K Q J 10 9 8

K 8 J 10 9 5 2 7 5 6 4 3 2

A Q 10 2 8 7 6 3 K J 10 9 A

7 5 4 3 A K Q A Q 6 2 7 5

West	North	East	South
	EM		SK
			1NT
Pass	3NT	End

 Opening Lead: J

 East can see 14 points in his hand and 7 in dummy, for a total of 21. Declarer must have at least 15 for his strong notrump opening. West has already shown the J. With 37 points accounted for, West can hold at most a king. If it's the K, declarer will hold the Q and will eventually finesse against your king for nine tricks. East should therefore switch to the 2. If West is gracious enough to produce the K, a spade return will defeat the contract.

 West's 6 was a considerate play; he was trying to send a suit-preference signal for spades (highest club to show something in the highest side suit.

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