East might win with the ace and return the suit.

After winning with his king, what should East have returned?

When East won and returned a heart, he was thrown back into the lead with a third round.

East took the ace and returned a club, won with the king.

East returned the diamond five, which was covered by the six and seven.

Consider the difference if East returned a diamond, for example.

When East returned the nine at the second trick he played low.

East won with the heart ace and returned the suit.

East returned the heart queen, and South won in his hand with the king.

East could win and return a heart, with a penalty of 1100 in prospect.