Cthulhu D, on 2012-March-29, 18:38, said:
If you regular fear, that partner has dead min, when he opens, than you should stop playing dead
min openers.
A similar situation is, when you start arguing "but it was an opening that occurred in 3rd hand, thats
why I did not give him credit for a real opener ...".
If you have are a Novice / Beginner, and if you have a teacher, which teaches you this in your 1st
year ... kill him.
And if you post a hand, with a bidding seq., when opener is bypassing a major, than you should reconsider
the forum as well. I have nothing against this style, I play it myself, but it does not belong in this
section of the forum.
Sry.
But to answer your question:
1NT can be 11-14HCP bal, you have 19HCP, for a small slam you need 33HCP, you may have the required HCP
amount, but you cant be sure, hence you invite.
Raising a NT bid to 4NT is the invite, this is similar to raising a 1NT opener to 2NT,
and raising a 2 NT opener to 4NT.
If the amount of HCPs is there, you will also have enough Aces, so that they cant cash the first 2 tricks.
If partner is in the upper range of 11-14, i.e. if he has 13-14 he will raise 4NT to 6NT, otherwise he will
pass.
If 1NT showes 12-14, than partner should pass with some 13 HCP hands, and raise with some others.
Raising 4NT to only 5NT is played as reinvite, no idea how to better phrase it.
With kind regards
Marlowe