CONTRACT: 4 South
OPENING LEAD: K (from A-K or K-Q)
Four possible losers: two hearts, one diamond and one club.
Line of play: eliminate a diamond or a heart loser.
Trick 1 W: K, A, 2, 5
Trick 2 N: K, 4, 2, 8
Trick 3 N: Q, 6, 7, 9
Trick 4 N: J, 3, 6, Q
Any return by West will give declarer an extra trick: a club will allow a diamond discard in South, while a diamond or a heart return will be ran to South's queens.
Declarer makes his contract.
The defense takes three tricks: one club and two tricks in hearts and diamonds.