This call has so many meanings in the game of bridge, and it would take a lifetime for anyone to figure out what they all mean. This call has been the subject of so many treatments and interpretations. These have been named. Following are a few, but by no means all.
These are all used in some conventions and treatments, and this call must be understood by your partner. Therefore, a Partnership Agreement is essential.
It cannot be said that each double is unique, but every time this call is made, certain defined interpretations and understanding accompany it.
Click on the individual double and learn what they all mean. In time, there will be yet more doubles, and yet more interpretations, and yet more understanding of their meanings. But we leave that to the future, and shall deal now only with the present.
If you wish to include these features, 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.