Reverse Drury used in defense and after opening on the third and fourth hands with a strength of 10 HCP.

Answers:

• • 2 in its own suits - 11- HCP;

  • 2♦ - 12-14 HCP;

  • 2 in the second major - at least four 15+ HCP;

  • 2NT - balanced hand 15+ HCP;

  • 3 ♣ - four clubs 15+ HCP;

  • 3♦ - four diamonds 15+ HCP;

  • 3 in its suit - sixteen 15+ HCP.

After suit or NT intervention, the convention is off.