CAB Response Method

CAB is an acronym for Two Clubs, Ace-asking, Blackwood, and although the system is no longer used, the system did have some popularity in England during the decade of the 1950s. The major contributions to the development of the CAB bidding system is accredited to Mr. Leslie William Dodds, born in the year 1903 and died in the year 1975. Although there were several other contributors to the CAB bidding system one other major contributor was Col. George Gordon Joseph Walshe, who was born in the year 1873 and died in the year 1959, and who lived in London, England.

CAB Responses to a strong, artificial 2 Clubs opening is a feature of the CAB Bidding System. The strong, artificial 2 Clubs opening conveys the same message to partner in both the Acol and Standard American bidding systems. Col. George Gordon Joseph Walshe, in collaboration with Mr. Leslie William Dodds, conceived a method, whereby the partner can specify the location of Aces, the number of Kings, and also determine the number of Queens.

The following schematic will assist in understanding this concept. No examples are provided since the concept is rather straight-forward and self-explanatory.

Opener Responder Meaning
2 2 This is a negative response showing 8 or fewer points, and no more than 2 Kings in any suit.
2 An idle bid.
2 Promises the Ace of Spades even if it is a singleton, but does not indicate any strength or values.
3 Promises the Ace of Clubs even if it is a singleton, but does not indicate any strength or values.
3 Promises the Ace of Diamonds even if it is a singleton, but does not indicate any strength or values.
2 NT Shows no Ace and 8 plus points, including at least 2 Kings.
3 NT Shows 2 Aces, any suit.
4 NT King-Asking. Partnership employs favorite form of Blackwood.
5 NT Queen-Asking. Partnership employs favorite form of Blackwood.

A certain advantage is that since the number of Aces has been already disclosed on the first response of the partner, then the opener can employ 4 No Trump as King-Ask and 5 No Trump as Queen-Ask. The responses are according to partnership agreement.

 

 

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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