Posted 2006-September-08, 22:07
I happen to be in the Picture Jump school. Here's why, oriented toward the new person to 2/1 GF.
Back in the day, 2/1 GF introduced a concept of "fast arrival," where a jump to game denied "extra's" and, conversely, slower bidding suggested more stuff. It helps with the 16-opposite-16 slam, where each partner has something extra, but not quite enough to pursue slam alone.
Additions to theory, however, have added two new tools, a "Serious" 3NT and a "Last Train to Clarksville" cuebid.
This is extremely simplistic, and actually wrong, but the way to sort of "get" the concept is to look at these calls from a HCP standpoint. In reality, the idea is to facilitate good cuebidding, to find the fit of cards between two hands. But, just to get a rudimentary understanding...
Imagine 1♠-P-2♥-P-3♥ as the start. Opener has, say, 12-20 HCP's. Responder might be able to bid "Serious 3NT" with, say, 18 HCP's, needing a mere 14-point top-end minimum for slam. That's the "serious" 3NT cuebid. (Again, I know that this is wrong, but it gets the idea started.)
With, say, 16, Responder needs 16. So, Responder might cuebid something. Had Responder held a minimum 13-count, he'd sign off at 4♥, expecting Opener to move with 19-20.
So, a cuebid might show maybe 15-17 HCP's. If Opener has 17-18, he can move toward slam, working opposite 15 (the "low end" for a cuebid). With 15, needing the "high end" of 15-17, Opener can bid the cuebid right below game (4♦), asking for help.
Once you get this basic idea, you learn that there is much more to it. But, you also realize that there is a lot of ability to work out the finer points between 3♥ and 4♥. The jump, then, merely crowds the bidding. When we "preempt" ourselves, we want very good definition to that call.
When you couple good cuebidding technique, with a Serious 3NT (of non-serious if of that school) and a Last Train to Clarksville cuebid, fast arrival thought falls to the side, and Picture Cuebids emerge as a better alternative.
For the original poster, learn the basics of 2/1 first, with fast arrival, but keep in mind that there is a "better way." Once you get that old style, move to the modern approach. It works wonders and will amaze you.
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."
-P.J. Painter.