Let me try. (1)The responser want to reverse to 2S if the opener dont bid 1S; and (2)there is neither void nor single in hand; (3)Just concern the quality of trumps and side ctrls for a slam; At these kind of cases ,why dont u bid RKC 4NT?
When we played Gerber, the group of us had a convention that anytime any jumping or direct 4C over opening NT is Gerber. For this hand,Considering of Splinter will lead the bidding to a rough way. Does anyone agree with me?
It's obvious that there is some misfit on this deck, and impossible to further a slam. The best bid, I think, is 4S to sign off: (1),4H is impossible better than 4S; (2),3NT will be hard to complete; (3),4D is too strong for this hand. TY!