List of defenses to 1NT

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] a hybrid of Astro and Aspro
• Astro,^[1][2] Modified Astro, Pinpoint Astro,
  Grano-Astro, Roth-Stone Astro
• Astrolite^[1]
• Becker^[1][2]
• Bergen over 1NT^[2] (see DONT)
• Blue Club transfers^[2] (see 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] or CoCa
• CRASH^[2] (aka CRO)
• Crowhurst convention
• DONT,^[1][2] Revised DONT
• Exclusion bids^[1][2] (aka Super Convention)
• Feathertson
• Feel Away Notrump (FAN)
• Feel Oriented Notrump Destroyer (FOND)
• Gates adjunct^[2]
• Grano-Astro^[1][2] (see Astro)
• Hamilton^[1][2]
• Hello^[2]
• Kelsey^[2]
• Landy^[1][2]
• Lionel^[2]
• Maestro Double
• Meckwell
• Meyerson
• Modified Astro^[2] (see Astro)
• Mohan
• MONK
• Multi-Landy
• Nilsland
• Pinpoint Astro^[2] (see Astro)
• Pottage,^[2] Revised Pottage
• Power^[2]
• RCO^[2]
• Ripstra^[1][2]
• Roche convention
• Roth^[2]
• Roth-Stone Astro^[2] (see 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] See also WIND convention
  and WINDA
• WIND convention^[2]
• WINDA^[2]
• WONT^[2]
• Woolsey^[3]