If South held a heart loser, there was no hurry to play that suit.
West's trump winner had to be played on South's heart loser at the 13th trick.
In either case South was able to discard his last heart loser.
As can be seen, that contract would have had no chance, with a guaranteed heart loser.
The crucial play after the lead of a high club was to discard a heart loser.
A heart was led to the king, and when it won South had to find a way to avoid two heart losers.
West was left with a heart loser, and the result was down two.
South would then have emerged with just five tricks for a penalty of 1,100, since he cannot avoid four heart losers.
He then threw his heart loser on the club queen.
The diamonds took care of the heart losers in the closed hand.
