This is a list of

bidding system A bidding system in contract bridge is the set of Glossary of contract bridge terms#agreement, agreements and understandings assigned to Glossary of contract bridge terms#call, calls and sequences of calls used by a Glossary of contract bridge te ...

s used in

contract bridge Contract bridge, or simply bridge, is a trick-taking card game using a standard 52-card deck. In its basic format, it is played by four players in two competing partnerships, with partners sitting opposite each other around a table. Millions ...

. Systems listed have either had an historical impact on the development of bidding in the game or have been or are currently being used at the national or international levels of competition. Bidding systems are characterized as belonging to one of two broadly defined categories: * natural bidding systems and * artificial bidding systems. Nevertheless, each contains elements of the other given the number and variety of treatments and conventions that have been developed by bridge bidding theorists.

Natural four card majors systems

* 5-4-4-3 System *

Acol Acol is the bridge bidding system that, according to ''The Official Encyclopedia of Bridge'', is "standard in British tournament play and widely used in other parts of the world". It is a natural system using four-card majors and, most commonly, ...

* Baron, an English system developed in the 1940s by Leo Baron, Adam Meredith and others. * CAB, acronym for Two Clubs, Ace-asking and Blackwood *

Canapé A canapé () is a type of hors d'oeuvre, a small, prepared, and often decorative food, consisting of a small piece of bread (sometimes toasted) wrapped or topped with some savoury food, held in the fingers and often eaten in one bite. Name T ...

* Colonial Acol * Culbertson * EFOS, the Economical Forcing System developed by Eric Jannersten and others in Sweden in the sixties and seventies * EHAA, acronym for Every Hand An Adventure * Four Aces Team * Goren * Nordic * Official System * Reith One-over-one

Natural five card majors systems

* 2/1 game forcing * 5-5-4-2 System * 5-5-5-1 System * Aces Scientific * Alpha *

Bridge World Standard Bridge World Standard (BWS) is a bidding system in the card game contract bridge, first developed and serially published in 1967-69 as BWS 1968 by The Bridge World magazine. Like the Standard American Yellow Card (SAYC), it was intended "for use b ...

* Eastern Scientific * Five Card Majors *

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* Romex * Roth–Stone *

Kaplan–Sheinwold The Kaplan–Sheinwold (or "K-S") bidding system was developed and popularized by Edgar Kaplan and Alfred Sheinwold during their partnership, which flourished during the 1950s and 1960s. K-S is one of many natural systems. The system was defini ...

Standard American Standard American is a bidding system for the game of bridge widely used in North America and elsewhere. Owing to the popularization of the game by Charles Goren in the 1940s and 1950s, its early versions were sometimes referred to simply as 'G ...

* Western Scientific

Strong club systems

* Blue Club * Black Club * Canary Club * Carrot Club * French Club * Hybrid Club * Icelandic Precision * Modified Italian Canape System (MICS), constructed and published by Ken Rexford * Moscito * Neapolitan Club *

Nottingham Club Nottingham ( , locally ) is a city and unitary authority area in Nottinghamshire, East Midlands, England. It is located north-west of London, south-east of Sheffield and north-east of Birmingham. Nottingham has links to the legend of Robin ...

* Power Precision Club *

Precision Club Precision Club is a bidding system in the game of contract bridge. It is a strong club system developed in 1969 for C. C. Wei by Alan Truscott, and used by Taiwan teams in 1969. Their success in placing second at the 1969 Bermuda Bowl (and Wei's ...

* Schenken Big Club *

Simplified Precision Simplification, Simplify, or Simplified may refer to: Mathematics Simplification is the process of replacing a mathematical expression by an equivalent one, that is simpler (usually shorter), for example * Simplification of algebraic expressions, ...

* Super Precision Club * Ultimate Club *

Vanderbilt Club Vanderbilt Club was one of the earliest bidding systems in the game of contract bridge. It was devised by Harold S. Vanderbilt, who had in 1925 devised the game itself. It was published by him in 1929. It was the first strong club system. An up ...

Artificial one club systems

* Betangina * Bissell * Lea System * Little Roman Club * Polish Club * Power Club *

Roman Club Roman Club ( it, Fiori Romano) is an artificial bridge bidding system devised in the 1950s by Giorgio Belladonna and Walter Avarelli of Italy's Blue Team. They used it to win twelve WBF World Teams Championships, three Olympiads and numerous Eu ...

* Swedish Club * Trefle Squeeze *

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Strong diamond systems

* Big Diamond * Magic Diamond * Leghorn Diamond (Livorno) * Mirror Diamond * CS System

Weak opening systems

* Carrotti * Delta * No Name * Regres * Säffle Spade, a forcing Pass system

Artificial systems

* HUM Systems *

Little Major The Little Major is a bridge bidding system devised primarily by Terence Reese. Origins The concept for "the Little Major" was born late in 1962 while Reese was en route to a tournament in the Canary Islands with Boris Schapiro. First with Schapi ...

* Marmic * Relay Systems

Losing trick count systems

* Imperspicuity

Other systems

* Amsterdam Club * Bangkok Club * Churchill Style * Crane * Dutch Spade * Kamikaze Notrump *

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* Orange Club * Pro System * Simplified Club *

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* Stone Age Acol With Pakistani Preempts * Symmetric Relay *

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* Walsh *

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* Cliff Yang * MMMMajor Bridge Bidding SystemMMMMajor Bridge Bidding System
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References

{{WPCBIndex *