Assuming 2♣ = 6+♣ 2R are transfers (5+M), super accepts including 2N with doubleton, 3♣ rejects (singleton M), otherwise GF available after xfer. 2♠ is GI+ with 3+♣ [helping to decide between 3N and 5♣, or slam invitational], asking for suit quality and shortness then 2N = max (GF), good clubs, then 3♣ asks, 3suit = singleton, 3N = no singleton 3♣ = minimum, then 3♦ (if responder GF+) asks for shortness, 3M = singleton, 3N = singleton♦ 3suit = max (GF), ratty clubs, shortness in suit 3N = max (GF), ratty clubs, no shortness 2N is GI+ without clubs - balanced (doubleton♣) or singleton♣, and no 5+M then 3♣ shows min 3suit shows max, singleton 3N shows max, no singleton 3♣ is preemptive 3♦ is to play This can also be played with 2♣ showing 5♣ and 4M, with the appropriate modifications to 2♠ and 2N for club length.