Glasnevin Bridge Club

Muiderberg 2H/S Opening
These show exactly 5 of the bid major plus a 4+ card minor, 5-10 HCPs concentrated in the suits in question. Responses are mostly natural with three exceptions; 2NT says “name your minor” either for sign off or to bid on, 3C says “I’m 15-17 with no support for your major”, 3D says “I’m 15-17 with support”

Responses to 2H
  • Pass Weak with support or tolerance.
  • 2S Natural & Forcing.
  • 2NT Relay instructing opener to identify his minor.
  • 3C Relay showing invitational strength (15-17) and denying support.
  • 3D Relay showing invitational strength (15-17) and support (3 cards+).
  • 3H Purely pre-emptive.
  • 3S Natural & game forcing.
  • 3NT To play.
  • 4m Splinter.
  • 4M To play.
Over a 2S opening, responses are identical except;
  • Pass is simply weak.
  • 3H is natural & invitational.
  • 3S is pre-emptive.
After 2H-2NT-3C
  • Pass Weak with clubs.
  • 3D Natural & forcing.
  • 3H Slam hunting.
  • 3S Interested in 3NT and showing a spade stopper.
  • 3NT To play.
  • 4C Slam hunting.
  • 5C To play.
After 2H-2NT-3D the responses are identical except;
  • Pass is simply weak.
  • 4C is natural & forcing.
  • 4D is slam hunting.
  • 5D To play.
After 2S-2NT-3C
  • Pass Weak
  • 3D Natural & forcing.
  • 3H Natural & game forcing.
  • 3S Slam hunting.
  • 4C Slam hunting.
  • 5C To play.
After 2S-2NT-3D
  • Pass Weak.
  • 3H Natural & game forcing.
  • 3S Slam hunting.
  • 4D Slam hunting.
  • 5D To play
In essence, the 2NT bidder is either weak and looking for the best place to play or strong. An invitational responder uses 3C or 3D.

After 2H/S-3C
  • Pass Minimum with clubs.
  • 3D Minimum with diamonds.
  • 3H Maximum with clubs.
  • 3S Maximum with diamonds.

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