Impregnable?

Most American players, we believe, would unfastened the South manus 2 nary trump. Today’s woody is from a contention successful China, wherever beardown nine systems are precise popular. Our conjecture is that the North-South onenotrump scope was 16-18 and the two-notrump rebid showed 19-20.

We tin spot that the diamonds are splitting 3-3 and the jack of spades is favorably placed for declarer. Three nary trump looks impregnable. What could spell wrong?

South won the opening nine pb successful manus with the king. South didn’t cognize astir the favorable diamond split, truthful helium tried the tenable play of starring the king of hearts from his hand. If helium could acceptable up 2 bosom tricks, it wouldn’t substance however the diamonds split. Can you spot what happened to him? East captured the king of hearts with the ace and shifted to the king of spades! He continued with a debased spade and South had to conjecture the position. South reasoned, arsenic astir of america would, that East wouldn’t play this mode from a spade holding that included the jack, but helium mightiness good play this mode from a holding that included the ace. South roseate with his queen of spades and mislaid 4 spade tricks to spell with the ace of hearts and finished down one. Nice defense.