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The first Laws of Duplicate Contract Bridge were published in 1928. [1] They were revised in 1933, 1935, 1943, 1949, 1963, 1975, 1987, 1997, 2007 and 2017. [2] The Laws are effective worldwide for all duplicate bridge tournaments sponsored by WBF, zonal, national and subordinate organizations (which includes most bridge clubs).
The Culbertson 4-5 notrump is a slam-seeking convention in the game of contract bridge. It was devised in the early 1930s by Ely Culbertson. Most four-notrump conventions (Blackwood and its variants being the best known) demand that bidder's partner define their hand using agreed codified responses. In contrast, the Culbertson 4-5 describes the ...
The more modern trend is to lower the threshold of ten cards to nine cards and consider 5-4 distributions also two suiters. The six possible combinations are given the names " major suits " (spades and hearts), " minor suits " (diamonds and clubs), " black suits " (spades and clubs), " red suits " (hearts and diamonds), " pointed suits ...
The Baron Three Clubs is an alternative to the responder using Stayman over a 2NT opening bid. The responder will have five points or more and an unbalanced hand. The responder bids 3 ♣, which asks opener to bid his four-card suits in ascending order. If clubs are the only four-card suit, the opener bids 3NT.
The Strong Club System is a set of bidding conventions and agreements used in the game of contract bridge and is based upon an opening bid of 1 ♣ as being an artificial forcing bid promising a strong hand. [1] The strong 1 ♣ opening is assigned a minimum strength promising 16 or more high card points. All other bids would therefore be ...
An opening bid of 2 ♦ shows one of two distributions: 4-4-4-1 or 5-4-4-0 (the five card suit is usually not a major suit) and 11-15 HCP The Mini-Roman 2 ♦ opening is a forcing bid. Responder has the following options. 2 ♥: Pass or correct and non-forcing; 2 ♠: Pass or correct to 3 ♣ and non-forcing; 2NT: Forcing, asking opener to bid ...
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In the 5-3 case, the two remaining established cards (assuming the opponents cards are 3-2 or 2-3) can also bring tricks in no trumps, if there is an entry to the hand which owns these cards. Immediate discovering of 5-4 fits is possible on one way with five-card majors, and on two ways with four-card majors.