Sites in this category aim at describing one or many bidding systems, or conventions.
Sites 16
- The Blue Team Club System Description of a complex bidding system invented in Italy. A major part of the information is in downloadable files only. Bilingual site (Italian/English).
- The L System An original bridge bidding system presented by Hong Liu, based on very light openings.
- M.A.F. - The Ultimate Bridge Bidding System A scientific bidding system from the Netherlands (5-card majors and different two-suiter openings). Bilingual site gives information in English and Dutch.
- Bidding Quest Practice bidding on prepared deals with scores. Compare and check how other pairs have bid same boards. Try bidding competition with anonymous partner.
- The Diamond Major Forcing club, 5-card major, medium notrump system.
- The Chilli Bidding System Gives priority to simplicity and universality of rules.
- Bridge Guys Lists and defines a large number of systems and conventions.
- Bridge Files Offers a collection of different systems, a list of conventions and information about the game and its players.
- Inquiry 2/1 GF Online book presenting the author's variation of this popular north American system.
- Bridge Conventions Presents an list of explanations and definitions.
- SA-YC Simplified 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.
- Discussing the Law of Total Tricks Three-time world champion Mike Lawrence of the USA and bridge theoretician Anders Wirgren of Sweden offer proof that the number of trumps is a poor guide to the number of tricks. Includes information on the book, "I Fought the Law of Total Tricks."
- The WEB Bidding System Worldwide Easy Bridge is a simple bidding system presented by Etienne Turpin.
- Bridge Is It 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).
- REGRESsion Modification of the bidding system Regres, based on frequent openings with weak hands and opening passes with strong hands.
- The Acol Bridge Pages Presents an Acol bidding discussion as well as play and defense agreements. Includes a Windows freeware program, WolfBridge.