SWEDISH JACOBY 2 NO TRUMP
This is a variation of the Jacoby 2 No Trump used in Limit Raises. This variation is played in Sweden and has gained some popularity. The year of the origin of Swedish Jacoby 2 No Trump is unknown, but according to Mr. Stefan Zylberstein in an email dated: Friday, 14 February, 2003, the Stenberg convention is named for the Swedish master and theoretician Mr. Alvar Stenberg, who introduced the Stenberg convention into the praxis of Swedens bridgelife. It is also the contention of Mr. Stefan Zylberstein that the Stenberg convention and the Swedish Jacoby 2 No Trump convention are the same conventional methods of game-forcing responses and showing trump support. The Stenberg convention is a variation or a different version of the Swedish Jacoby 2 No Trump, which is generally the mostly employed convention.
The following chart provides the responses of the responder and the rebids of the opener:
North
South
Meaning 1 any Major
2 NT
Jacoby 2 No Trump 3
Indicates a minimum opening 3
Promises extra values with no singleton 3
Promises extra values with a Club singleton 3
Promises extra values with a Diamond singleton 3 NT
Promises extra values with a singleton in the unbid Major 4
Promises extra values and a void; Splinter bid 4
Promises extra values and a void; Splinter bid 4 other Major
Promises a void in the unbid Major
The bidding process becomes clear after such descriptive responses and the opener and the responder can bid accordingly, as in the following bidding example:
North
South
Meaning 1 any Major
2 NT
Jacoby 2 No Trump 3
Indicates a minimum opening
3 bid Major
The responder signs off
3
This is a Asking Bid for any singleton
3
A cuebid if the opening is Spades
3
A cuebid if the opening is Hearts
If the bidding sequence is as follows, then the rebids by the opener are indicated in the following chart:
North
South
Meaning 1 any Major
2 NT
Jacoby 2 No Trump 3
3
3
Promises a singleton Club 3
Promises a singleton Diamond 3 NT
Promises a singlton in the unbid Major suit 4
Indicates no singleton and is a cuebid of Clubs 4
Indicates no singleton and is a cuebid of Diamonds 4 other Major
Indicates no singleton in any suit; cuebid not possible
If the partnership agreement is such that these responses are used, then the first response of 2 No Trump can be applied even on invitational values. As a consequence, the bidding sequence 1 Major - 3 Major becomes preemptive in nature.
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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