gordontd, on 2011-April-16, 02:27, said:
I agree with Gnasher: it depends on what agreements we have got about potentially analogous sequences.
What do we play after (1
♣)[2+]-1NT-(P)-?
What do we play after (1suit)[natural]-P-(P)-1NT-(P)-?
What do we play after (1
♣)[2+]-P-(P)-1NT-(P)-?
If, in the light of our actual agreements, I think that "natural, weak" and "clubs" are both significant possibilities, then I'll bid 2NT. If partner has clubs, he'll bid 3
♣ or 3NT. If partner has spades, he might interpret 2NT a natural with a spade fit, but I don't mind that: opposite
♠AJ10xx and litle else, 3NT could easily make, whilst if he has a bad hand with spades, he can sign off in 3
♠.
3
♣ is another possible call to hedge my bets, although I prefer the more flexible 2NT.
gordontd, on 2011-April-18, 03:51, said:
South is a very experienced but elderly player who is not especially comfortable with complicated system. At the beginning of the match he remarked on the EW system, and said that he would ask a lot and that nothing should be read into it. They discussed how to defend against responses of 1♦ & 1♥, but not 1♠, and it was a point of uncertainty to both of them whether 1NT in the sandwich position should be natural or two-suited.
The 1♣ opening had come up several times already and he had asked about it, so he didn't ask again in this auction. The 1♠ bid (alerted) had not come up before and South asked whether it showed spades, before bidding 2♠ himself. Both he and North said that he was asking to try to work out whether the 1NT bid was strong balanced or two-suited, but it did have the unfortunate effect of removing any doubt that North might have had as to the nature of the 2♠ bid.
The uncertainty about the meaning of 1NT makes life more complicated. If I judge from my partner's question (UI to me, of course) that he might think my 1NT bid is a 2-suiter then perhaps a bid of 2NT now (which "confirms" the natural nature of the 1NT bid) is not permitted by Law 73C.
Therefore if I consider 3
♣ to be a plausible action, that is the call I should make.
1♣=Weak NT, or clubs
1♠= no 4cM, not single-suited GF
(spot cards may differ from original - posted from memory)
You are in uncharted territory.
Your call now?