I opened 1NT and Adrianne quickly transferred me into 4S. South led AC and luckily for me didn't play a diamond next, but continued a club. So I discarded a diamond and played a third club discarding another diamond. North ruffed this and cashed AD. North now played 7S.
Well South started with 7 clubs and didn't lead a singleton. If she is 7 - 2 - 2 - 2 I don't think North is playing from K7 of spades, K to 3 is possible, but I reckoned that this defender would be less likely to do that. I decided to go for gold and rose with the Ace. Contract made.