johnu, on 2014-September-17, 23:55, said:
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Weak two bids that may be on fewer than 5 cards suits are alertable as they are unusual, not because they're illegal (or what, the alert would be "this bid is illegal, call the director"?). Yes, you can open 3♣ on a 3 card suit, just like you can open 1♣ or 1♦ naturally (noting that these don't require the 10 point "all purpose" opening clause to be legal; you can open a natural 1m on 8 HCPs if you want). If you want to understand why natural bids are allowed and why it's important that GCC defines what natural means for openings and overalls, ask yourself whether you're allowed to open 4 card majors 1M, and if so, where is it allowed on the GCC.
As for strong, weak, etc, "strong" is referenced several times together with the requirement of 15+ HCPs, even though it's not explictly defined that way. Recalling that 10 hcp is average, you would think that a 9-11 range for example would be a hand of average strength, not "weak", since it's almost as likely to be stronger than weaker than 10 HCPs. Normal weak twos typically have a 5-11 range as played in standard, so something with 8-11 is a lot closer to "average" strength than weak. Not as issue we can resolve since they don't define "weak", but it sounds like Anthony's ruling referenced this issue referring to his opening as semi-constructive rather than weak.