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With the addition and evolution of various treatments and conventions, it is now more generally referred to as Standard American. It is a bidding system based on five-card majors and a strong notrump; players may add conventions and refine the meanings of bids through partnership agreements summarized in their convention card. One standardised ...
The value of five-card majors can be understood then on two levels: When partnerships have a 5-3 distribution in a major suit, the eight-card fit is easier for the player with the three cards to find. The strong preference to play duplicate bridge in the major suits at the game level makes the five-card major convention very attractive.
3 ♣, 3 ♦, 3 ♥, 3 ♠: 4–7, 7-card suit; 3NT: 14–15, balanced; 1 ♦: 11–15, no 5 card major or 6 card club suit. Originally 4+ suit and unbalanced hand. A notrump range is included in some versions, 2+ suit in this case. In some versions, where classic precision 2 ♦ opening is not played diamonds can be even shorter. 1 ♥, 1 ♠ ...
Level bonus for game and slams: If a deal results in a game contract, slam or grand slam bid and made, level bonus points are recorded above the line and have the same values as in duplicate bridge. Part-score accumulation and level bonus: The part-score treatment differs from that in duplicate bridge and is somewhat akin to that of rubber bridge.
The negative double is a form of takeout double in bridge.It is made by the responder after their right-hand opponent overcalls on the first round of bidding, and is used to show shortness in overcall's suit, support for the unbid suits with emphasis on majors, as well as some values.
Gerber is a contract bridge convention devised by William Konigsberger and Win Nye from Switzerland [1] who published it in 1936; John Gerber of Texas introduced it to North America in 1938 where it was named after him. [2] [3] It is similar to Blackwood but uses 4 ♣ instead of 4NT as a relay (asking) bid to inquire about the number of aces ...
In American Contract Bridge League (ACBL) tournaments, support doubles must be indicated on the convention card and must be Alerted. Additionally, when opener makes a call other than a support double (including Pass) when the support double is an option, an Alert should be made if the partnership agreement is that opener's failure to double or ...
In the partnership card game contract bridge, the Blackwood convention is a bidding convention developed by Easley Blackwood in 1933 [1] and still widely used in the modern game. Its purpose is to enable the partnership to explore its possession of aces, kings and in some variants, the queen of trumps to judge whether a slam would be a feasible ...