rhm, on 2014-April-02, 01:50, said:
I wonder how many people play new-suit advances forcing when responder interjects 1NT as here. (...)
I don't know. What I do know is that there is a meta-rule for this:
If RHO bids, new suits by advancer are NF.
If RHO passes, they are forcing.
The reasoning is if RHO bids, advancer can hardly have a strong hand. It's much more likely he would merely want to compete. And even if he does have a good hand, then the overcall almost certain to be sub-par and again there's no game on...
...bar a psyche by RHO.
The good thing is, this isn't the sort of situation that's psyche-prone.