Legal natural forsing (Acol + codes, 2C week) Let l=summ of two longest colors. Add l-8 points (subtract a point with 4-3-3-3). Opening bid at the one level with 7- HCP is forbidden by WBF. In such case open with allowed bid. Openings: 1 color: 10+ 5- all, 6-6-0-0 12+ some 6+, 15+ 5-3-3-3 1 NT: 12-14 any 5-3-3-3 2 color: 8-11, 6+ Openings scheme with codes ([bid] week, 0-7): codes: 4-4-x-x 4-4-4-0 6-x-x-x 6-4-x-x 6-6-0-0 5-3-3-3 1C[D] 4-x-4-x 4-0-4-4 6-x-x-x 4-x-x-6 6-0-0-6 5-3-3-3 4-x-x-4 4-x-6-x 6-0-6-0 6-x-x-4 1D[H] 4-4-x-x 4-4-0-4 x-6-x-x 6-4-x-x 6-6-0-0 3-5-3-3 x-4-x-4 x-4-x-6 0-6-0-6 4-6-x-x 1H[S] x-4-4-x 4-4-4-0 x-x-6-x 6-x-4-x 0-6-6-0 3-3-5-3 x-6-4-x x-4-6-x 1S[C] x-x-4-4 0-4-4-4 x-x-x-6 x-6-x-4 0-0-6-6 3-3-3-5 x-x-6-4 x-x-4-6 1N[C] any Responder correct his points: Add k points for a 7+k fit. Add m points for expected m ruffs. Subtract a point for expected missfit. --- Variant without relay (Week=0-7, M=8-11, Strong=12+): Responses after 1C: 1D: Week; p(0-4)=9%, p(5-7)=20% 1H: 8+, 4+ H 1S: 8+, 4+ S 1N[D]: M, z-z-2-2=(4-4-2-2, 5-3-3-3, 3-5-3-3) 2C[D]: 12+, 3- H, 3- S 2D[H]: M, x-6-x-x 2H/2S[+]: M, 6+ color 2N[D]: M, 5-5-3-1, 5-5-1-3 3C[H]: M, 6-y-x-x 3D[H]: M, 4-6-x-x