South expects that East will score 2,210 in seven hearts.
The lead of the fourth club allowed East to score the heart jack to defeat the game.
East scored two more trump tricks, but the contract was safe.
This was covered by the king and East scored a second ruff.
East scored the diamond king before South could reach his hand to take a discard.
East took his ace, and scored his heart king later for down one.
Now he was down one, for East scored the heart jack and returned a spade to defeat the game.
But East could not score the six, and the hand was made.
Once the diamond king is out of the way, East has the jack as an entry and can score his club trick.
East scored the spade jack at the finish for down two.