There are many pieces described in bridge books. There are also chords on which the game of the book is wrong, for one reason or another. Sometimes the problem is deciding which category a particular transaction falls into. At other times, he recognizes the play in an unusual form.
South’s overcall of a no-trump showed a good 15-18 runs. North’s raise to play was aggressive. He probably added a point for his weak five-card flush.
West led the seven of spades: two, jack, six. When East continued with the king of spades, South won with his ace. Now declarer was leading the queen of clubs from his hand. If West had won with the king, he would have been unable to lead another spade, so he dodged the rook to his partner’s ace. East continued with the queen and another spade, establishing his nine, but he had no comeback. Declarer conceded one club to the King of West and claimed nine tricks: two spades, three hearts, one diamond and three clubs. The fineness of the diamond was not necessary.
The defenders shrugged, complimenting South for their first-round duck. South thanked them, but he knew better. He had noticed that if East played spade nine (or four) to the first trick, the contract could be void. South wins with the 10 of spades and leads a club, but West steals with the king and returns his second spade. East’s suit is established while he still holds the club ace as his starter.
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In a no-trump contract, when declarer has two caps in the suit you are trying to establish, get him to use one as quickly as possible.