Mathematical Tables

Mathematical Probabilities Percentage The numerous combinations of 52 cards and their probabilites and/or percentages of distribution and/or pattern and/or occurence have been studied by many mathematicians, arithmeticians, probability theorists, and mathematical statisticians. The source of the tables below are from The Official Encyclopedia of Bridge, published by the American Contract Bridge League in the year […]

Summary of Defensive Signals

There are many ways to indicate, show, promise and inform a partner by the lead of a certain card or via a discard of a specific card the expectation of the ensuing play. These defense signals have a definite meaning and belong in every partnership agreement. These different leads and/or discards have been posted separately […]

Gerber Convention

The development of the Gerber convention is accredited to Mr. John Gerber, born in the year 1906 in Houston, Texas, United States, and died January 28, 1981, who devised the method in 1938. This convention is sometimes referred to as the Four Clubs Blackwood. The concept and fundamental idea was devised independently by Dr. William […]

Delayed Canape Rexford Eichenbaum

Delayed Canapé This is a developing concept originating with Mr. Kenneth Rexford (aka Ken), of Lima, Ohio, United States, blogger, and Mr. Kenneth Eichenbaum (aka Ken), of Columbus, Ohio, United States. The source is archived information on his Internet blog called Cuebidding At Bridge. Mr. Keneth Rexford is the author of Cuebidding At Bridge, published […]

Weak Jump Shift

Weak Jump Shift Response During the evolution of the game of bridge the introduction and employment of the immediate Strong Jump Shift response by the responder, signifying a minimum of 15-16 high card points plus and a 6-card suit, became standard. This action was forcing and many bridge players and bridge authorities considered it forcing […]

Hello Convention

This conventional defense method was devised and developed by Mr. Gerald W. Helms , also known Jerry Helms, of North Carolina, United States. The defense method is derived from the surnames of Mr. Jerry Helms and his bridge partner and co-contributor Mr. Bill Lohman. This defense method was developed as an improvement of the Cappelletti […]

Jordan Two No Trump

Since the official designation, which is Two No Trump Response Over Opponent’s Takeout Double, is too long, this convention has simply been called Truscott Two No Trump, Jordan Two No Trump and Dormer Two No Trump. This conventional method was devised by Mr. Alan Truscott and described by him in The Bridge World magazine, issue November 1954. However, the second designation for […]

Leaping Michaels

The concept is attributed to Mr. Mark David Feldman, a bidding player and bridge theorist. He was born in the year 1951 and is of New York City, New York, United States. He is also the originator of a defense methiod to a strong Club opening, devised in the year 1971 at the age of […]

Goren Bidding System

The basics of the Goren Bidding System includes opening the longest suit first. Other features is opening the lower of 4-4 in the Minor suits, jumping to 2 No Trump or 3 of the opening suit, if the point count is 13 to 15 support points. The No Trump range is between 16 and 18 […]

Exclusion Keycard Blackwood

Exclusion Keycard Blackwood is a continuation and extenuation of the Roman Key Card Blackwood convention. The concept behind this convention is to show a void while exploring for the possibility of a slam. The bidding process is quite easy to learn and will assist in reaching, through the exchange of information, the correct contract. Many […]

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