Cappelletti
Defense of Multi-Landy after a natural 1NT opening of the opponent, available in both the direct and passout position.
Bids:
double - 13-14-15+ HCP (depends of vulnerability);
2♣ - a single suited hand, forcing;
later 2♦ - relay,
2♦ - both majors 5+4+, 10+ HCP;
2♥/2♠ - 5+M and 4+ minor, 9+ HCP;
2NT - 5+5+ minors;
blocking.
After the intervention, the convention is off.