The origin of this conventional opening is unknown. The concept is frequently a Weak Two bid opening with multiple meanings and clarified by the opener with the second bid.
Parameters of the Concept
The high card point values may be less than an opening count, or exceedingly strong, and the Weak Two bid is dependent on distribution. An opening bid of 2 Spades shows either:
1. a preempt in either Minor suit, or 2. a semi-solid or solid Major suit, or 3. a holding with 20 high card points plus with a 5-4-4-0 shape and a Minor suit void.
The responder bids 2 No Trump, which is a relay bid, in order that the opener clarifies his holding.
3 : Shows a preempt in Clubs. 3 : Shows a preempt in Diamonds. 3 : Shows a semi-solid or solid Heart suit with no less than Queen high. 3 : Shows a semi-solid or solid Spade suit with no less than Queen high. 3 NT: Promises a solid Major suit. The responder relays to discover which Major suit. 4 : Promises values of 20 points plus and a void in Clubs. 4 : Promises values of 20 points plus and a void in Diamonds.
The continuances following each first rebid by the opener, clarifying the holding, allow the partner to place the contract. In this manner, the opening partner, bidding on the two level, obstructs the competing opponents, but will frequently not preempt partner.
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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