An Awful Suit
South can, with care, make 2 NT. I'll leave that to the reader.
Perversely, East/West have a sacrifice in clubs.
In
3 ♣ by East/West, the obvious defense is to lead
a trump. East wins the
♣ A, plays the
♠ A, ruffs a spade, crosses back to the
♦ K,
ruffs another spade, plays the
♦ A and
another diamond, ruffed with the
♣ 3, and finally a
fourth round of spades, ruffed in West, and overruffed in North,
reaching this position:
Notice, you've stripped North/South of all but hearts and clubs. They
get to take their trumps but then have to concede a heart trick at
the end, giving the defense five tricks, for -100, if doubled.