Over-Under 2NT

The 2NT opening shows 7-10 HCP with 5-5 in minors or 5-5 in majors

Responses:

• 3 = minor preference (opener rebids 3 with majors)
• 3 = minor preference (opener rebids 3 with majors)
• 3 = invitational to 4. Opener rebids:
  • pass = majors, minimum
  • 4 = majors, maximum
  • 3NT = minors
  • 4 = void, majors
  • 4 = void, majors
• 3 = invitational to 4. Opener rebids:
  • pass = majors, minimum
  • 4 = majors, maximum
  • 3NT = minors
  • 4/4 = void, majors
• 3NT = to play if minors. Opener's rebids:
  • 4/4 = void, majors
  • 4 = majors, no void
• 4 = forcing. Opener's rebids:
  • 4 = majors
  • 4 = minors, minimum
  • 4 = minors, maximum