- Opener opened 1NT
- Responder said 2♣ (Stayman)
- Opener respond 2♦ (no 4th major)
Then he bids the longest major at level 2.
Then he bids the shortest major at level 3. (ALERTABLE)
Then he bids 3♦. (ALERTABLE)
Opponent interfere anything except DOUBLE in any position
♠♥♦♣