1
♣ - 1
♠ - ?
and you hold something like Qxxx AJxx xx xxx.
Partner can bid pass, dbl or 1NT.
If your agreement is that "dbl" shows
♥ and
♦, than you have to bid 1NT or pass.
If your agreement that "dbl" shows 4+
♥, than you can make a different use of 1NT (e.g. stronger hands) and pass.
1
♣ - 1
♠ - X - p
?
Now if you play that openers 2
♦ is a reverse (the logical choice
♣=>
♦), than weaker hands have to bid 1[NT] even if they don't have a
♠ stopper.
If you want that 1NT promises a
♠ stopper, than you have to pass, rebid
♣, bid 2
♥ with 3 card-support (if 3334) and 2
♦ cannot show reverse strength.
In both cases your partnership has to pick it's poison.
Edited: Optimized using helene_t's input.
This post has been edited by hotShot: 2010-February-04, 09:18