rhm, on 2018-April-10, 04:10, said:
I think the problem was your 4♣ bid, not your pass.
Over 3♥ you should jump to 5♣ precisely because your values are not soft. This gives a precise description about your hand in light of your previous pass and North could have bid 6♣ if he held a singleton spade
(your partner denied a spade stopper)
Rainer Herrmann
I agree.
One of the fundamental points at play here is that North
knows
that he has opening values opposite opening values. South doesn't, and can't, know this; at least not yet.
That is why I believe that it's North's move, so to speak, not South's, and why Pass is South's best bid.
I'm assuming that N/S are playing strong NT, so Pass by South says; "I'm minimum, and my rebid was either Clubs or 12-14 NT or, possibly though unlikely, 1
♠" It's surely the most descriptive bid? North MUST compete at any form of scoring opposite South's Pass.
At MPs, I would then bid 2
♠ with North's hand. South would retreat to 3
♣ and the picture is complete for North to bid 5
♣, no?
D.