On the next two diamond winners East threw a heart and a club.
South worked out the right solution by taking one diamond winner but not two.
West should not be afraid to shift to a heart after taking his second diamond winner.
Only then will South know whether to discard a heart or a club on the diamond winner.
He took the ace and ran three more diamond winners, putting pressure on West.
West attempted to cash three diamond winners, not the best defense.
You lead two diamond winners and then a third round.
West therefore threw his diamond winner, established with great effort.
It would have been more interesting if West had discarded his diamond winner.
This time the lead was the club two, and East began to cash his diamond winners.