East took three club winners but had to lead from the diamond king to allow the game to make.

It would have been a mistake to cash the remaining club winner.

If he plays low, South will cash her club winners and play a third heart.

As it was, West took two club winners and shifted to hearts.

As expected, East could not lead a heart so he led a club winner.

South tried the jack, won the third round with the king, and ran five club winners.

Now South was cut off from the club winners in his hand.

A heart lead to the king was allowed to win, and two club winners were cashed.

The best defense is for West to take two club winners and play a third round.

East would have been squeezed down to one club winner, then given the lead in that suit with a similar effect.