Declarer put up dummy's ace and continued with the ace of spades revealing the 5-0 break. He played off the ace and king of diamonds and ruffed the six of diamonds with the spade three. The spade queen was unblocked, the closed hand was entered with the ace of clubs and the remaining trump were extracted. The queen of diamonds was cashed, forcing West to discard a club as dummy parted with the jack of hearts. South led a club at trick twelve and, when West followed with the queen, an overtrick was home, N-S +1010.
West had been squeezed by the play of the queen of diamonds and was forced to pitch a club in order to retain the heart queen.
North had indicated slam interest by rebidding three spades. South signed off at game since he did not hold extras but partner overruled him by asking for controls. North advanced to a small slam when the reply promised two controls without the trump queen.
6NT is also icy because of the favorable lie of the heart honors but North rejected 6NT as a possible destination.