mikeh, on 2014-February-06, 12:23, said:
We clearly haven't established suit agreement. So the question is whether it is safe to infer suit agreement. To answer that, we look at whether we have any agreements about 5♣. If we have no agreements, then we go to default principles.
I do have a generic rule that covers auctions in which one partner has bid a natural 3N, suggesting we play there, and the other partner is unlimited.
4N becomes a quantitative ask. 4♣ is either natural and forcing (obviously only when we may wish to play in clubs) or a cuebid (when it is clear that we aren't playing in clubs), and this means we have no clear way to ask for Aces/keycards. This means that in all my partnerships, we use a jump to 5♣ as 'supergerber'...it is ace asking. I think this is a pretty common expert treatment: I believe I first read about it in the Bridge World MSC some 30 years ago or so, so it isn't some esoteric agreement I or my partners cooked up.
Since 3N was a suggestion to play, and responder was unlimited, it seems to me that using 5♣ as Ace asking is a plausible option, and that means that my default analysis would lead me to conclude that it wasn't exclusion.
I am not, in saying that, arguing that simple ace asking is the best use, or that it is better than exclusion. I am saying that I have an agreement in place that assigns a meaning to 5♣ and that I don't have any default rule that the fact that an opp pre-empted changes the meaning. Nor do I see anything in the fact that RHO pre-empted that renders it illogical to suppose that I could ever have a hand on which I wanted to ask for Aces. Indeed, I suspect that such a hand is more common that the type of freak I hold on this thread.
Good for your partnership if your default agreements are good enough to ensure you are on the same page after a 5
♣ bid.
But I disagree with your suspicion that this is the optimal agreement. I don't recall the last time I used Gerber, and in general you don't seem to be a big fan of it either. I don't see how it can become more important in a cramped auction where RHO preempted. I think the hands where we want to try for slam with a club void are more common than the ones where all we need to know is the number of aces in partner's hand. In addition, the latter type of hands can probably get by most of the time starting with 4
♣.
My guess is that it would be superior to restrict your 5
♣ default agreement to non-competitive auctions.
N.B.: I also think 5
♣ as showing a spade slam try with a club void is superior to exclusion on this auction.
The easiest way to count losers is to line up the people who talk about loser count, and count them. -Kieran Dyke