Stefan_O, on 2016-September-08, 10:32, said:
I had not seen this handy chart before. Of particular interest to me: For "Responses to NT Openings...", under "Not Alertable", we find:
"Next higher level of clubs asking for a four-card or longer major"
Whew. Thus 2NT-3C (Puppet) is not alertable as I have always believed it should not be. Whether or not the acbl has always agreed I am not sure, I believe it has not, but from experience I am absolutely certain that directors have been inconsistent on this.
After 2NT-3C it is almost impossible to imagine a defender choosing one course of action if 3C is Puppet Stayman but a different course of action if it is standard Staymn. But it is not at all impossible to imagine the 3C bidder has forgotten that they are playing Puppet until the alert helpfully reminds him that they are, clarifying the upcoming response. Of course after 2NT-3C-3D (or 3H or 3S or 3NT) an alert is appropriate if it is Puppet. But if, say, 3D is alerted as showing at least one major and the 3D was intended as denying a major this will be clear, and can be sorted out.
This has come up repeatedly and I am really pleased to have this easy to read reference. Thank you.