This is a list of defensive conventions used in the game of contract bridge to compete in the bidding after the opponents have opened with a one notrump (1NT) bid.
ANTI Aspro [ 1] [ 2] Asptro ,[ 1] [ 2] Astro and Aspro Astro ,[ 1] [ 2] Modified Astro , Pinpoint Astro ,Grano-Astro , Roth-Stone Astro Astrolite [ 1] Becker [ 1] [ 2] Bergen over 1NT[ 2] DONT )
Blue Club transfers[ 2] Transfer overcalls )
Brozel [ 1] [ 2] Cansino ,[ 1] [ 2] Modified Cansino Canape transfers Cappelletti ,[ 1] [ 2] Modified Cappelletti , Revised Cappelletti CDH Buchanan CHASM Comfy Canapé [ 2] CRASH [ 2] Crowhurst convention DONT ,[ 1] [ 2] Revised DONT Exclusion bids [ 1] [ 2] Feathertson Feel Away Notrump (FAN) Feel Oriented Notrump Destroyer (FOND) Gates adjunct [ 2] Grano-Astro [ 1] [ 2] Astro )Hamilton [ 1] [ 2] Hello [ 2] Kelsey [ 2] Landy [ 1] [ 2] Lionel [ 2] Maestro Double Meckwell Meyerson Modified Astro [ 2] Astro )Mohan MONK Mylläri Multi-Landy Nilsland Pinpoint Astro [ 2] Astro )Pottage ,[ 2] Revised Pottage Power [ 2] RCO [ 2] Ripstra [ 1] [ 2] Roche convention Roth [ 2] Roth-Stone Astro [ 2] Astro )Sahara convention [ 2] Scorrchio [ 2] Sharples convention ,[ 2] Modified Sharples Soap convention [ 2] Splash convention [ 2] Suction ,[ 1] [ 2] Twerb Suction , Suction Redwood Supernatural
Tizi convention [ 2] Toss convention [ 2] Transfer overcalls [ 2] TRASH Uni-club [ 2] Vroom convention [ 2] Modified Wallis Westwood convention [ 2] WIND convention WINDA WIND convention [ 2] WINDA [ 2] WONT [ 2] Woolsey [ 3]
^ a b c d e f g h i j k l m n o Francis, Henry G.; Truscott, Alan F. ; Francis, Dorthy A., eds. (2001). The Official Encyclopedia of Bridge American Contract Bridge League . p. 109. ISBN 0-943855-44-6 OCLC 49606900 . ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq "Defence to 1NT - a survey for the new millenium" (PDF) . Australian Bridge (December 2000): 20–21. Retrieved 14 October 2011 .^ Francis, Henry G.; Truscott, Alan F. ; Francis, Dorthy A., eds. (2001). The Official Encyclopedia of Bridge American Contract Bridge League . p. 576. ISBN 0-943855-44-6 OCLC 49606900 .