201

Suggested Opening Lead

West would lead the Club K against 2 spade , top of the broken sequence.
Suggested Play
Declarer starts with a heart trick, three diamonds, and a club, for a total of five. Three more tricks are needed, and they will need to come from l he spade suit.
Declarer should plan to take a repeated finesse in spades by leading spades twice from I lie dummy, hoping East has the spade A. After winning the ClubA, declarer leads a low spade. If East plays low, declarer wins the trick with the spade Q. Declarer then goes back to dummy with a diamond and leads another spade. If East plays low, declarer wins the spade K. If East plays the spade A, declarer's spade K will win a trick later.
Playing this way, East will get only two spade tricks and declarer will get three, even though the missing spades are divided 4-2. That's just enough to make 2 spade.
Suggested Defense
The defenders can establish a club trick and two heart tricks. If declarer leads the spade K or spade Q instead of leading toward the honors, East can win the spade A and will get three spade tricks to defeat the contract.
Conclusion
In standard methods, South would pass North's INT response. That's a reasonable contract, since North can get two spade winners with the help of the repeated finesse, to go with the three diamond tricks and the heart A and club A. That's seven tricks. The defenders can develop six winners before declarer can develop a third spade trick. In a spade contract, declarer can take eight tricks.
Using the forcing INT, responder needs to be aware that opener's rebid may be a three-card minor suit. The partnership can't stop in 1 NT, but will often reach an equally good or better contract than when using standard methods.