A heart lead would have decided the issue, but West led a diamond.

West led the heart king, which was allowed to win.

West was now on lead with just his four hearts, and led a low one.

West now led a heart, and the defense had no chance.

Left to himself, West will no doubt lead a heart.

West led the club five and South had to guess.

But when he played a second heart, West won and led a third round.

West held up his king for one round and then led a second club.

West led the heart two, leaving the result in the balance.

Why had West led a diamond rather than a heart?