South won dummy's ace and drew trump discarding a heart from the table. An advance of the nine of diamonds posed a problem for West. Should he grab the ace or play low? After some thought he hopped with the ace and switched to the queen of hearts and the game was soon down one, N-S -50.
If West fails to take the ace of diamonds, ten tricks roll home. He could have returned a club on this layout because declarer has no entry to dummy to access the diamond winners. The club lead had presented the defense with their best chance of setting the contract. If West begins with the queen of hearts, South should play dummy's king since he does not want a club switch. East wins the ace. Would he return a diamond or a heart? West may conclude that he holds a singleton if he returns a diamond. A return of the deuce of hearts might also convince West that South holds ten third of hearts. West could easily go wrong, allowing the game to come home. North's 1NT rebid was offshape and he owned a solid 15 HCP. This action gave East an opportunity to offer a leaddirecting overcall. South might have considered a leap to 3NT since he owned eight spade winners.