Bridge column, December 7: I'll give you one for five in return

What should South do here? He is in three no-trump, and West leads the club queen.
North is right to raise immediately to three no-trump. If he had a low singleton club and his ace in either major, there would be a much stronger case for showing his diamond suit, because three no-trump might fail with five or six diamonds laydown.
South starts with seven top tricks: one spade, three hearts, one diamond and two clubs. The extra tricks will have to come from diamonds. But now that the club ace has evaporated, there isn't a dummy entry left.
Courage, mon ami. At trick two, declarer should lead a low diamond from the board. If East has king-doubleton, he might nervously take the trick with his majesty. Or he might pause so long that he gives the game away.
Here, though, East wins with his nine and returns a club.
South takes his king, plays another diamond, and bravely calls for dummy's queen.
When the finesse wins, declarer collects 11 tricks. But if East could produce the diamond king, the contract would probably go down three -- a difference of five tricks!
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