East won with his king and cashed the spade queen.

East cashed the heart ace, learning that South was now out of hearts.

On winning with the eight, East could have cashed two diamond winners.

East could cash his heart ace, but then had to make a play that would help the declarer.

East won with the ten and cashed the diamond king.

East took the king, cashed the heart queen, and led a diamond.

East won the king, and cashed his two heart winners.

East won with the jack and cashed his heart ace.

As it was, East won with the king, cashed his heart winner and led a diamond.

A diamond lead was won with the jack and East cashed two heart winners.