CONTRACT: 3 South
OPENING LEAD: K (from A-K or K-Q)
Four possible losers: one spade, one heart, one diamond and one club.
Line of play: find the spade king with West (unlikely given the auction).
Trick 1 W: K, A, 7, 5
Trick 2 N: 5, A, 3, 2
Trick 3 E: 2, 8, 9, 4
Trick 4 W: 10, 6, 2, 6
Trick 5 S: K, 4, Q, 3
Trick 6 S: J, 7, 5, 8
Trick 7 S: J, 5, 7, K
The defense will take his fourth trick with the club ace.
Remark: a three-notrump contract cannot succeed against a heart lead and good defense. Even if declarer ducks hearts twice, East will find the club shift when on hand with his diamond ace, allowing West to run his heart winners.
Declarer makes his contract.
The defense takes four tricks: the spade king, one heart, the trump ace and the club club.