Bridge by Frank Stewart
"I assume you think Cy isn't playing with a full deck," I observed. Cy the Cynic, a shameless chauvinist, and Wendy are fierce adversaries.
"The Cynic?" Wendy snorted. "He's a full deck, all deuces."
When I watched Wendy and Cy defend today's deal as East-West, Cy led his singleton diamond against four hearts. South won with the king, led a trump to dummy's jack, and returned a trump to his king. Cy took the ace and shifted to a club: four, king, seven. Wendy grimaced and returned the queen of diamonds, and when declarer followed low, Cy - ruffed.
South won Cy's club return with the queen and claimed. He could reach dummy with the ace of diamonds to pitch his last diamond on the ace of clubs.
If Wendy leads, say, a spade after she takes the king of clubs, South has 10 easy tricks: five trumps, two diamonds, two clubs, and a spade. For the defense to prevail, Wendy must lead the queen of diamonds, but Cy must refuse to ruff, letting dummy's ace win. Cy loses his ruff, but the defense gets two tricks in exchange: Dummy's entry to the ace of clubs vanishes, and South loses two diamonds, a trump and a club.