This did indeed guarantee a heart trick, but it opened the door for the defense.

There was no way to avoid the loss of a heart trick eventually.

Now there is no way to avoid the loss of a heart trick.

East then led a club and South eventually lost a heart trick for down one.

Then East sat back and waited to collect a heart trick for down one.

But South must play carefully to avoid the loss of two heart tricks.

South now felt confident, for he expected to score five heart tricks.

He wondered why East had not won the first heart trick and returned a diamond.

He would lose two club tricks to West and a heart trick.

A second diamond lost to the jack, and the defense then took four heart tricks.