It is easy to see that South could surrender a club to the ace and take 10 tricks.

South ruffed and surrendered a club to make his game.

South won in his hand, led a heart to the king and surrendered a heart to the ace.

South cashed his heart winners and surrendered a diamond to East, who continued that suit.

South won with the ace and surrendered a heart to the jack.

And of course the defenders will play a second trump if South surrenders a club trick.

South ruffed again, and surrendered a spade to the queen.

After a passive diamond lead, for example, South can win in dummy and surrender two club tricks.

If East had ducked, South would have surrendered a diamond.

South would take two club winners, throwing the spade jack, and surrender a diamond.