Declarer (North) is playing a contract in hearts. On the fifth trick, he leads a high club, and East follows suit. Dummy is void in clubs. Declarer calls for the queen of spades to be played. Dummy, apparently not hearing, and assuming that a heart ruff would be called for, plays a heart. Declarer apparently does not notice. West plays a club and everyone turns over their card. North then starts to lead from his hand, and is informed that he is "on the board" with the heart ruff. North states that since he called for a spade, dummy must put the heart from the previous trick back on the board and replace it with the Queen of spades. East disagrees, stating that since the trick was concluded when the cards were turned over, the trick must stand as is. Who is right?
