Inverted minors: 1m-(Pass)-2m if the opening shows 3+m.

• • 10+ HCP;

  • 4+ suit if opening shows 4+m or 5+ suit if the opening shows 3+m (4+ if 16+ HCP);

  • no majors;

  • no upper HCP limit.

Opener rebid after 1♣ - 2♣:

• • 2♦ - stop showing ♦ or 4♦,  nothing about ♥ and ♠, 13+ HCP;

  • 2♥ - stop showing ♥ or 4♥, denies a stop in ♦, nothing about ♠, 13+ HCP;

  • 2♠ - stop showing ♠ or 4♠, denies a stop in ♦ and denies a stop in ♥, 13+ HCP;

  • 2NT - 11-13 HCP;

  • 3♣ - 5+♣, 11-13(+) HCP;

  • 3♦ - splinter, 13+ HCP;

  • 3♥ - splinter, 13+ HCP;

  • 3♠ - splinter, 13+ HCP;

  • 3 NT: 

    • • 13-14 HCP, stop showing in both majors (WJ, PC);

      • 18-19 HCP, stop showing in both majors (21GF, Acol, Sayc).

Opener rebid after 1♦ - 2♦:

• • 2♥ - stop showing ♥ or 4♥, nothing about ♠, 13+ HCP;

  • 2♠ - stop showing ♠ or 4♠, denies a stop in ♥, 13+ HCP;

  • 2NT - 11-13 HCP;

  • 3♣ - splinter, 13+ HCP;

  • 3♦ - 5+♦, 11-13(+) HCP;

  • 3♥ - splinter, 13+ HCP;

  • 3♠ - splinter, 13+ HCP;

  • 3 NT: 

    • • 13-14 HCP, stop showing in both majors (WJ, PC);

      • 18-19 HCP, stop showing in both majors (21GF, Acol, Sayc).

After the intervention, the convention is off.