Introduction to standard American bidding.
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.
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).
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.
Survey of a large number of commonly used bridge bidding conventions and bidding systems.
Description of a complex bidding system invented in Italy. A major part of the information is in downloadable files only. Bilingual site (Italian/English).
An original bridge bidding system presented by Hong Liu, based on very light openings.
A scientific bidding system from the Netherlands (5-card majors and different two-suiter openings). Bilingual site gives information in English and Dutch.
Detailed description of the Precision Bidding System (strong 1 club opening, with 16+ points), as modified by one partnership.
Contract bridge bidding, as developed by Culbertson. Culbertson's survey of good playing techniques is also included.
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