05 / 1D OPEN [07.15.2007] COMMENT: OMEGA and a few other bidding systems prefer that a 1D opening always [USUALLY] promises a minimum of 4 D's. OMEGA's inclusion of "Inverted minor" and pre-emptive minor raises offers the same accuracy with minor suit bidding as that which is available for MAJOR suit bidding. REQUIREMENTS 3+ D = 12-19 HC NOT appropriate for other Opening 15-17 HC [NEVER 5332-or-5422] 1st RESPONSE 1MAJOR = Standard 1NT = 6-10 HC; NO 4-Card MAJOR 2C = 10+ HC [Same Suit Rebid NOT Game Forcing] 2D = GAME FORCING; Inverted minor [Limit Raise PH] 2MAJOR = Weak Jump Shift; 6-Cards; 0-5 HC 2NT = Invitational; 11-12 HC; NO 4-Card MAJOR; Preemptive D Raise over TO-X 3C = Limit Raise for D 3D = Preemptive; 4-7 HC; 5+ Cards; Invitational Limit Raise over TO-X 3MAJOR = SPLINTER; D Support 3NT = FINAL; 13-15 HC; NO 4-Card MAJOR 4C = SPLINTER; D Support 4D = "minorWood"; 14-30; D = Key Suit 4NT = Blackwood; 14-30; NO Key Suit OPENER'S REBIDS AFTER 1MAJOR RESPONSE 1S (Over 1H) = 12-17 HC 1NT = 12-14 HC 2C = NEW minor; 1-Round Force 2Same MAJOR = Constructive; 7-10 HC 2H after 1S 1st Response = WEAK; NOT Forcing REVERSE = Game Forcing 3Same MAJOR = Invitational; 11-12 HC; 6-Cards 3C = WEAK; 6+ Cards 2C = 12-16 HC; “MAY” have Longer C; without REVERSE HC 2D = 12-16 HC; 6+ D 2Same MAJOR Raise = 12-16 HC 2New MAJOR = 17-19 HC; REVERSE 2NT = 18-19 HC 3D = 17-19 HC 3Same MAJOR Raise = 17-18 HC; 4 Trumps; NO SPLINTER 3Other MAJOR = SPLINTER; 4 Trumps; Support for Responder; 17-19 HC 3NT = FINAL; TRICKS 4C = SPLINTER; 4 Trumps; Support for Responder; 17-19 HC 4Same MAJOR Raise = 19 HC; 4 Trumps; NO SPLINTER 4NT Over 1MAJOR = Blackwood; 14-30; MAJOR = Key Sui OPENER'S REBIDS AFTER 1NT RESPONSE 2C = 12-16 HC; MAY have Longer C; without REVERSE HC 2D = 12-16 HC; 6 D 2MAJOR = 17-19 HC; REVERSE; 4+ Cards 2NT = 18-19 HC 3C = 17-19 HC; 4+ C 3D = 17-19 HC; 6+ D 3NT = FINAL OPENER'S REBIDS AFTER 2D (INVERTED) 2MAJOR = Stopper; NO Stopper other MAJOR 2NT = Both M Stopped; 12-15 HC -or- minimum HC 3C = Natural; MAY have Longer C; without REVERSE HC; NO MAJOR Stopper 3D = 5+ D; NO SPLINTER; NO MAJOR Stopper 3MAJOR = SPLINTER 3NT = Both M Stopped; 16-17 HC -or- MAXIMUM HC 4C = SPLINTER 4D = "RKC"; 14-30; D = Key Suit 4NT [Both M Stopped; 18-19 HC - RARE] SEQUENCES AFTER WEAK JUMP SHIFT = DESCRIBED IN OTHER CONVENTIONAL BIDS OPENER'S REBIDS AFTER 2NT RESPONSE 3D = Invitational; 6+ D 3C = Natural; MAY have Longer C; without REVERSE HC 3MAJOR = 17-19 HC; 4+ Cards; REVERSE 3NT = FINAL RESPONSES AFTER SUIT INTERFERENCE X Through 3S = Negative X; Appropriate HC 1S over 1H (UPH) = Natural; Forcing 1NT = Standard 2D = Standard; 6-10 HC 2New Suit (NON-Jump) = Forcing 1-Round 2-Level Q-Bid = Limit Raise of D -or- Better 2MAJOR Jump Shift = 0-5 HC; 6-Cards 2NT = 11-12 HC; Invitational; GOOD Stopper 3D (JUMP) = Preemptive; 4-7 HC 3D (NON-JUMP) = Competitive; 8-11 HC 3MAJOR (NON-JUMP) = Game Forcing 3MAJOR (JUMP) = SPLINTER 3-Level Q-Bid = Invites 3NT -or- Forcing D 3NT = 13-16 HC: GOOD Stopper 4C (JUMP) = SPLINTER REBIDS AFTER NEGATIVE X Responsive X After RHO Competition ["Requested" Suit w / o Top Honors] 1MAJOR = Standard 1NT = 12-14 HC 2C = 12-16 HC; MAY have Longer C without REVERSE HC 2D = 12-16 HC 2H (Over 1S) = 12-16 HC 2S After 1H OverCall = 16-17 HC 2Q-Bid = 18-19 HC; At Least ONE 4-Card MAJOR 2NT NOT USED 3C (Jump) = 17-19 HC 3D (Jump) = 17-19 HC; 6+ D 3H (Over 1S) = 16-17 HC 3NT = FINAL; Tricks PASSED HAND RESPONSES 1MAJOR = Standard 1NT = Standard 2C = 5+ C; NOT Invitational 2D = LIMIT RAISE; Inverted minor 2NT = minimum 3NT = Maximum Other Rebids = Standard Inverted minor Sequences 2MAJOR = Weak Jump Shift; 6-Cards; 0-5 HC 2NT = Invitational; NO 4-Card MAJOR; Preemptive D Raise over TO-X 3D = Preemptive; 4-7 HC; 5+ Cards; Invitational Limit Raise over TO-X SEQUENCES AFTER NATURAL 1NT OVERCALL==> See 21