CONTRACT: 4 South
OPENING LEAD: Q (top of a sequence)
Four possible losers: one spade, one heart, one diamond and one club.
Line of play: discard the diamond loser on dummy's established clubs.
Trick 1 W: Q, K, 8, 5
If declarer takes the trump finesse at trick 2, West will win his king and return the diamond jack. The defense will now have a winner in each suit.
Trick 2 N: 8, 3, K, A
Trick 3 W: J, 4, 6, A
Trick 4 S: 3, 5, A, 2
South can now discard his losing diamond on the established club queen in dummy.
Trick 5 N: Q, 5, 4, 9
The trump finesse can now be taken safely.
Declarer makes his contract.
The defense takes three tricks: one spade, one heart and one club.