As a system designer, I've always felt that MP is not quite bridge - and hence should have system design characteristics associated with aggression and pre-emption, while focusing on no trump and the spade suit. MP bridge is a WAR – at least at the A and OPEN levels. A bidding system should recognize this and consider overcalls and competitive balancing in its design. The key consideration that many, many system designers fail to recognize is the concept of “SPACE”. Consuming space is critical when you believe that your side has fewer combined points than the opponents. And it is that decision that is extremely important out of the blocks – who’s board is it? For example, if "a priori" I have 8-12 points and 4+ spades, then my partner and I have a 55% likelihood of “profitably” playing 2S [2S off 1 or better]. So, from this viewpoint, I can support the contention that if I have 4+s and 8-12 pts, opening 1S is not only pre-emptive [consumes space] but VERY likely to be a SAFE position. Furthermore, it puts us into a very strong MP position of reaching the magical 2S contract. I often get asked why open 4card majors at all costs – and I respond that IF finding a 4-4 major fit AS QUICKLY AS POSSIBLE is our objective, what better way to do so then opening a 4card major, irrespective of a longer minor. However, what most people don’t recognize is that opening 1S consumes ALL of the bidding space at the 1level [unless LHO can overcall 1N]. So it is extremely PREEMPTIVE to open 1M [particularly 1S] for that reason – and one very curious one as well. Find me a pair of opponents who can find their OWN 4-4 major fit [or 5-3 fit] when WE have already opened their major… Trying to stay within the aegis of the GCC here in NA (must have 8pts to open 1suit, 10pts for no trump and still use conventions), I propose the following concept: 1♣ = 13+ guarantees 4+ in either major (1♦ response is waiting) 1♦ = 13+ denies 4+ in either major (1M response shows 5+) 1♥ = 8-12, 4+h [by process of elimination, must include at least 4s] 1♠ = 8-12, 4 or 6s [could have longer minor] 1N = 10-12, denies exactly 4s could have 5M332 2♣ = 8-12, 5+c/4h 2♦ = 8-12, 5+d/4h 2♥ = 8-12, 5+h (not 5h332 which is included in 1N) 2♠ = 8-12, exactly 5s (not 5s332 which is included in 1N) 2N = 8-12 55 or better minors You will note that I do not open 10-12 pt unbalanced hands with no 4+m [except 55 or better in the minors], since they have no pre-emptive value. By limiting the 1H through 2N openings to 8-12pts, responder is placed to pass as necessary and support to as high a level as practical. Obviously, a responder with 13 or more points should initiate a 1round forcing auction. This concept is based on a significant amount of simulation showing: 1) The importance of reaching 1N first 2) The importance of bidding spades when you have them 3) The importance of pre-empting the spade suit when you don't have them I'm sure that I might have run afoul of the GCC, but I can support each opening as being natural. Mid Chart approval is certainly not a problem. Comments are welcome. Cheers, Kurt