fromageGB, on Feb 24 2010, 04:24 PM, said:
Making the jump shift game forcing seems to have negatives when opener may have anything up to say an 18 count and therefore has to rebid 2♣. Responder with his 8 count has to go on, so rebids, maybe 2NT, and then finds opener has only 12 and you're playing 2NT when opponents have half the pack.
Surely 12-18 is far too big a range for a 2524 shape 2♣ rebid? 3♣ one-round force would be nice ...
Responder doesn't rebid 2NT with 8 points. 2NT shows 10-11.
With 8-9 responder can often do little other than taking false preference to opener's first suit. Bidding fora are full of problems where some vote for taking false preference on a singleton.
You can play off-shape 1NT rebids, or you can play Gazilli, or you can play a strong club system, or you can play sound Muiderberg so that a two-suited hand that opens at the 1-level has some 12+ points. All this can overcome some of the problems with the wide make of the non-jump rebids in a new suit.
Playing the jump rebid as not GF (in the context of otherwise standard methods, i.e. rebids generally natural and 1-of-a-suit wide-ranging) is a very bad idea, IMO. And very non-standard.
The world would be such a happy place, if only everyone played Acol :) --- TramTicket