Responses to 1 or 1 1 response to 1 is round forcing and asking to the opener to better describe his hand. It shows 4+ spades. If opener rebids the heart suit, he has exactly 5 hearts. 1NT is "to play", it discourages game and denies 4 spades if in response to 1. 2 is artificial and forcing; shows prospects for game; denies 4 spades if in response to 1. Direct raise of the suit is preemptive and sign-off. All other bids are "natural" and to play. Responses to 1NT 2 is a game-forcing relay asking for distribution 2 rebid is 4333 distribution (so 18-22 HCP + Controls). Oriented towards 3NT 2 rebid is 4432 with 3 cards in hearts (implying 2 cards in spades and a 4-4 minors). 2 rebid is 4432 with 3 cards in spades (implying 2 cards in hearts and a 4-4 minors). 2NT is distribution with 5 clubs and no singleton 3 is distribution with 5 diamonds and no singleton 3 is 5431 with 3 hearts (implying 1 spade) 3 is 5431 with 3 spade (implying 1 heart) 2 is a transfer to 2; Afterward: a rebid of 2NT is invitational to 3NT or 4H with 5+ hearts a rebid of 2 is invitational to 3NT and shows no relevance to either major 2 is a transfer to 2; a 2NT rebid is invitational with 5+ spades 2 is a transfer to 2NT or 3; 2NT by opener shows interest in game in clubs 2NT is a transfer to 3 or 3; 3 by opener shows interest in game in diamonds All level three responses are game forcing and show a 4441 distribution with a singleton in the bid suit Respond to 2 with 2 (a relay) Rebid of 2 specifies uni-suit (6 hearts) Rebid of 2 specifies 5-card spade side-suit Rebid of 3 specifies a 5-card club side-suit Rebid of 3 specifies a 5-card diamond side-suit Respond to 2 with 2 (a relay) Rebid of 2 specifies a uni-suit (6 spades) Rebid of 2NT specifies 5-card heart side-suit Rebid of 3 specifies a 5-card club side-suit Rebid of 3 specifies a 5-card diamond side-suit Other responses above 1NT 2NT asks for side top honor New suit is round forcing oriented toward fit and then side top honor Other bids are "to play" unless partnership has agreed otherwise Responses to 1 1 is negative (less