“If trumps are valuable coin for declarer, they are gold for the defenders.”

K 6 5
K J 6
9 4 2
A K 10 6
Q J 10 7 3
4
J 10 8 7
J 7 5
A 9 8 4 2
7 5 3 2

Q 9 8 3

A Q 10 9 8
A K Q 6 5 3
4 2

Playing in 6declarer ruffed the spade lead, led a trump to the jack and returned a low diamond. East did not ruff, so the queen won. A second heart was led to the king and another diamond was won in hand.

Now came a club to the ace, a third diamond to the king, then a low diamond ruffed by the 6. East refused to over-ruff and South cold return to hand only by ruffing, which left him with one trump less than East.

South began the play on the right lines but his second round of trumps was a mistake. If he had entered dummy with a club each time he would have retained control.

As the play went, the defence was obvious and most players would have done the right thing.