App compiled by Dominique Pilon consisting of 50 bridge deals to help you learn or revise your defensive play against NT. After 1NT opening, Opps defensive bidding, ex Landy 2 clubs (majors) 2 diamonds : unicolor major, double : long minor and a major with 4. Defensive play, Lead signals and suit manipulation depending on your position. You can also consult our revision notes : leading aganst games or slams, signalling on an ace or queen lead, The Smith Echo double asking for lead.....