Grosvenor Gambit

A Grosvenor ("GROHV-ner") Gambit is an intentional misplay of a hand aimed to psychologically upset one's opponents. It can be employed by declarer and defenders alike, but this description focuses on the defense.

This example comes from the original Bridge World article describing fictional occurrences of the gambit.

West QJ7632 75 106 AK9

North 108 J3 A873 J8764 South AK5 AK10962 KQ4 2

East 94 Q84 J952 Q1053

South declares 6 and West leads his two top clubs. After ruffing the second, South cashes his two top spades and ruffs a third spade with dummy's J.

East could overruff with the Q to immediately set the contract, but discards instead. Now South incorrectly assumes that West has the queen, and cashes the top trumps. East scores the Q after all, and presumably upsets South with his antics.