North opened his best suit, but unfortunately for him it turned out to be the best lead for declarer. His lead of the 4 of clubs brought out South's queen and West's ace. West cashed the ace of diamonds, went to dummy with the diamond jack and led back the 8 of clubs. South covered with the 10 and West's jack forced North's king. North shifted to a low heart, won by South's ace. But on South's low heart return, West played the six and the suit blocked. The contract could not be defeated after the club opening.
As predictors, you and I are already discredited, but there's worse to follow when the hand is played at the other table. There the bidding goes: