CONTRACT: 4 South
OPENING LEAD: K (from A-K or K-Q)
Four possible losers: one spade, two diamonds and one club.
Line of play: discard the club queen on declarer's fourth heart or take finesses in clubs or spades.
Trick 1 W: K, 3, 2, 8
East plays the two, signaling negative attitude. What's the best shift for West, knowing that East is denying the diamond queen or a doubleton ?
West counts his defensive tricks: the spade king and probably two diamonds. The possible setting trick must come from hearts or clubs. vIf East holds the heart ace, he will always have the opportunity to cash it, so a club shift seems more appropriate.
Trick 2 W: J, Q, K, 5
Declarer had an immediate decision: who has the club king ? Who has the trump king ?
Knowing that at least one of the two kings must be on-side to make his contract, South inserted dumm'ys queen which lost to East's king.
No matter the return, declarer will now lose to the trump king.
A diamond continuation or a heart shift by West at trick two would have allowed declarer to discard dummy's losing club on a good heart after pulling trumps.
The contract is set one trick.
The defense takes four tricks: one spade, two diamonds and one club.