North A K Q 9 5 3 K 6 J 5 4 3 J West J 8 7 J 8 7 3 A K 9 K 7 6 East -- 10 9 5 2 Q 10 7 6 A Q 10 4 3 South 10 6 4 2 A Q 4 8 2 9 8 5 2 The bidding: East South West North 1 3 2 7 East led the 6

Don't bother complaining about the bidding. I don't like it either, even though I was one of those bidders. East led a diamond to partner's ace and king, and West switched to a club. East finessed, winning the queen, and tried to cash the ace. North ruffed and played out three rounds of spades. Then he played a low diamond, East covering with the ten. After South ruffs, how much can South tell about the hand?

Every count card is accounted for except the king of hearts. Partner, who bid seven, has exactly six spades and a single club, so the heart king must be in the North hand. If North started with three hearts (there is no room for four), the ace of hearts lead will work. But just in case Pard has only a doubleton... South led the four of hearts, the only winning play.