mikeh, on 2023-April-08, 14:52, said:
That would, I think, be a very unusual use of FSF. FSF is usually played by responder, not opener. Plus I don’t understand how opener, having made a nf 1S ( it may rarely be passed but it isn’t forcing in normal methods) can now, after partner bid 1an(denying any primary fit and ,Ii ting his hand) can suddenly force with a possibly artificial bid
How does one bid, say, AJxx void KJxxx Axxx?
For us, Bidding the 4th suit is always art., this is a meta rule, which works reasonably well, not always,
but reasonably well, I also know, that players in N/A encounter quite often 5440 shapes, more often than I do.
The 1 NT response is still 6-10, so having a common signal can be quite usefull, if you have a unbal.
hand with 17/18, with suits that may not be strong enough to force to game.
And I would pass 1NT with the hand you have given.