South thought awhile and discarded the club 10. West won with the Queen and played a low club. East ruffed!! He now shifted to the Diamond K (an error?). South ruffed on the table, discarded the club Ace and Queen on the Heart J 10 and cross ruffed for 10 tricks, East under ruffing at the end!
Have you ever seen a hand where you have a 5/4 side suit fit with 100 honours and don't make a single trick in that suit? East has spades Q 9 8 x so you have to discard the club. You have 4 losers if you go for the club suit.