Principle

After a /1♥♠ - 1NT sequence, 2♣ is 16+ and asks for strength and support in the opening suit.

Example

/ 1♥ - 1NT: 6, 3♥ OR 6-9, 0-2♥

/ 2♣: 16+, Super Stayman

- 2♥: 6, 3-♥

- 2♦: 6, 0-2♥

/ 2♥: (5)6+♥

- PASS: 2-♥

- 2NT: 0/1 ♥

- 3♥: 7-9, 2-♥

/ 3NT: 5-♥

/ 4♥: 6+♥

- 2NT: 7-9, 0/1♥