1 No Trump Opening

A) 2 Clubs is Stayman, not promising a 4-card Major. Responder uses it also with a weak hand with both Majors or with a 3-suiter in Diamonds-Hearts-Spades. Consequently, opener has to bid 2 Hearts with both Majors.

Continuations after 1 NT - 2 Clubs - 2 Diamonds:

2 Hearts: a weak hand with both Majors. Opener can pass or correct to 2 Spades.

2 Spades: invitational hand with 5 Spades and 4 Hearts.

2 No Trump: invitational hand without Majors.

3 Hearts/Spades: game-forcing hand with 5 cards in this Major and 4 cards in the other.

 

Continuations after 1 NT - 2 Clubs - 2 Hearts:

2 Spades: invitational hand with 4 Spades and fewer than 4 Hearts.

2 No Trump: invitational hand without Majors.

3 Minor Suit: either a slam-going hand with the Minor or a forcing bid (possibly only a doubleton) with Heart support.

3 Hearts: invitational.

3 Spades / 4 Minor suit: Splinter.

3 No Trump: game-forcing with 4 Spades, fewer than 4 Hearts.

 

Continuations after 1 NT - 2 Clubs - 2 Spades:

2 No Trump: invitational hand with fewer than 4 Spades (possibly with 4 Hearts).

3 Minor Suit: either a slam-going hand with the Minor or a forcing bid (possibly only a doubleton) with Spade support.

3 Heart: undefined (forcing agreement of Spades?).

3 Spades: invitational.

3 No Trump: to play (with 4 Hearts).

4 any Suit: Splinter.

 

B) Transfers are played in 4 suits. After 1NT - 2D, 2 Spades and 3 any Minor show maximum, 4-card support and a doubleton in the suit bid; 3 Hearts shows minimum with 4-card support and 2 No Trump shows maximum with 4-card support. Similarly after 1NT - 2H. Responder should retransfer, if possible.

After 1NT - 2S / 2NT which are transfers to Clubs and Diamonds, respectively, the bid in between (2NT / 3C) shows maximum with Hxx in the relevant Minor.

Continuations after 1 NT - 2 Diamonds - 2 Hearts:

2 Spades: invitational hand with 5 Hearts and 4 Spades.

2 No Trump: invitational, balanced.

3 any Minor: either a slam-going two-suiter or a forcing bid with Heart support.

3 Hearts: invitational.

3 Spades: game-forcing, 5-5 in Majors.

3 No Trump: choice of games.

4 any Minor: Auto-Splinter

4 Spades: Roman KeyCard Blackwood

 

Continuations after 1 NT - 2 Hearts - 2 Spades:

2 No Trump: invitational, balanced.

3 any Minor: either a slam-going two-suiter or a forcing bid with Heart support.

3 Hearts: invitational, 5-5 in Majors.

3 Spades: invitational.

3 No Trump: choice of games.

4 any Suit: Auto-Splinter.

 

C) 3 Clubs is puppet Stayman; opener bids 5-card Major or 3 Diamonds with a 4-card Major (now responder bids the 4-card Major he does not have).

D) 3 Diamonds/Hearts/Spades is the Anti-Lemming convention: forcing to 3 No Trump or 4 of a Minor and express doubts about 3 No Trump (at most a low doubleton in the suit bid).

 

If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.

 

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