JanM, on May 5 2006, 11:21 PM, said:
I do not think it would be easy to classify the ACBL convention charts in a simple and concise manner. (I have not studied the WBF charts, so can't really comment on those.)
The ACBL charts are littered with special methods and/or inconsistencies. Examples from the GCC: you can use 1♣ or 1♦ as a general purpose opening, but not 1♥ or 1♠; you can use an opening 2♦ bid to show a three suiter (with at least 10 HCP), but you cannot use 2♥ or 2♣ for the same purpose; you can use a 1♦ response to a 1♣ opening as an artificial force, but you cannot use a 1♥ response to 1♦ for the same purpose. On the mid-chart you've got the obvious: you can play a multi 2♦, but not a multi 2♣ (not even if it were to show diamonds or hearts rather than majors).
I could not hope to lay out a set of simple rules which cover such oddities.
If, however, I was working from scratch and could allow or disallow methods by broad class, I think I (or a committee) could come up with reasonably simple charts. They would not mirror the current ACBL charts -- they may allow some methods that are not currently allowed and may disallow some methods which are currently allowed -- and may include more levels than the current three (GCC, Mid-chart and Super-Chart).
Somewhat related: I think it is easier to defend against a transfer opening (even a MOSCITO transfer opening) than it is to defend against Multi. Also, the difference between defending against a transfer opening and a natural opening is far less than the difference between defending against a natural weak two-bid and Multi, or the difference between defending a against an artificial preempt in a known suit and Multi. To some of us, the idea tha Multi is allowed while easier to defend against methods are not allowed, is questionable.
Also: thanks, Jan, for taking the time to share your thoughts with this group.
And, one final thought, just a reminder really: the people taking part in this thread in no way represent the mainstream tournament bridge player, in fact we are merely a fringe element.