Strong club-oriented systems from a russian player.

Proposes an approach based on a math model over computer analysis. Provides famous pairs systems, an exposition of the theory and a bidding machine.

A bidding system invented by Donald A. Varvel of Mountain View, CA, USA. It is based on an ambiguous 1 club opening, associated with 5-card majors, weak no trumps, and weak 2s.

Presentation of a variant of the Polish Club system.

Detailed presentation of a variation of the system.

Proposes articles on bidding system theory and offers examples for download. Free system design software available for download.

Introduction to standard American bidding.

Describes a system where priority is given to the strenght of the partnership hands.

Practice bidding on prepared deals with scores. Compare and check how other pairs have bid same boards. Try bidding competition with anonymous partner.

Presention of the Carioca Club and other conventions, links.

Presentation of various systems: Sheumaker-deBraal, Precision, Kaplan-Sheinwold.

Look-up tables for bridge bidding, with the most common conventions used in "Standard American" bidding, by Richard Pavlicek.

Thorough listing of bridge bidding systems and conventions, particularly those used in North America.

Provides an encyclopaedia of conventions, systems and treatments.

Provides overview of different systems, a list of conventions and information about the game. Free registration required.

Lists and defines a large number of systems and conventions.

Concerned with bridge bidding systems, especially CLONE, based on a forcing weak/strong 1 club opening. Also features links to other bridge resources, particularly on bidding systems. Bilingual site (English/Norwegian).

Description of a bridge bidding system based on the preferences of leading players, and aimed at the needs of occasional partnerships. Some characteristics: 5-card major opening, strong no-trump, artificial strong two-club opening, weak 2s in the other suits, and inverted minors.

Bidding system from Norway based on a Big Diamond relay sequence.

Presentation of two bidding systems, one a US adaptation of the British Acol system, the other a modification of Standard American.

Contract bridge bidding, as developed by Culbertson. Culbertson's survey of good playing techniques is also included.

Survey of a large number of commonly used bridge bidding conventions and bidding systems.

Presentation of the 2/1 system and other conventions, the author's ACBL convention card.

Description of a simple bridge-bidding system played by some British players, based on weak NT and four-card major openings.

Modified version of the Precision Forcing 1Club bidding system, with many transfer responses.

A scientific bidding system from the Netherlands (5-card majors and different two-suiter openings). Bilingual site gives information in English and Dutch.

Proposes bidding notes to download for many systems, conventions and treatments.

Proposes a collection of articles, tests and free software. English and Turkish.

Description of the Polish Club bidding system, with different variants.

Detailed description of the Precision Bidding System (strong 1 club opening, with 16+ points), as modified by one partnership.

Presents an overview of a system mixing a strong club with standard methods.

Modification of the bidding system Regres, based on frequent openings with weak hands and opening passes with strong hands.

This bidding system is a simplified version (as played on OKBridge) of the Standard Yellow Card (SA-YC) system of the ACBL (American Contract Bridge League). Its essential features include the strong no-trump, 5-card major and weak 2 openings.

Description of a complex bidding system invented in Italy. A major part of the information is in downloadable files only. Bilingual site (Italian/English).

Gives priority to simplicity and universality of rules.

Forcing club, 5-card major, medium notrump system.

An original bridge bidding system presented by Hong Liu, based on very light openings.