lamford, on 2016-August-28, 11:25, said:
You do bid as if there were screens (with the additional requirement to avoid taking advantage of the UI), but it is your agreement that is relevant, NOT what you intended the bid to show. If you had screens, and you bid 2NT on a balanced 20 count, then you would use what you thought your agreement was to decide on what to bid. Of course, with screens you can do anything. And you would take into account that partner did not bid over 1X. Having decided on the LAs, you then go back to the UI to decide what is demonstrably suggested. When polling in this case, if there was no agreement you would say so, and if there was an agreed range you would say so. If I was asked what I intended 2NT as, I would just reply, "We have no agreement on the range". In this example, you would state, as with many pairs, "We have not discussed either 3NT or 4D; and I would be making it up if I elaborated."
The relevant clause is: A logical alternative action is one that, among the class of players in question and using the methods of the partnership, would be given serious consideration by a significant proportion of such players, of whom it is judged some might select it. (my emphasis). So you poll players of the same ability with the same methods. Here "undiscussed". You don't make up extra stuff about what you intended the bid to show.
And if 6D was an LA in the poll, then 5D is demonstrably suggested by the UI over that, as partner is merely giving preference from the UI, so I would impose that. It scores worse than 4D+1 or 4D=. On reflection, I should give a PP just for 5D, but in practice it is complicated enough that I would not.
Missing the entire intent of what I'm saying. Until you know what the bidder thought he showed, you can't evaluate the LAs, nor can you poll. (and very often in cases like this the bidder is playing the system he plays with a different partner so has a very good idea what he thinks he's shown)
It's more obvious to explain in the 1x-p-p-2N case, if you thought partnership methods were 20-22, there is no LA to pass, if you thought you were playing 18-20, there is no LA to bidding on and either you're bidding 6N directly or if you think you've got some agreement to say show a blackwood response on the way, do that.
If I bid 3N thinking I was showing 9 solid tricks (or close), then 4
♦ is forcing and I'm sub minimum so 5
♦ is the only possible bid.
If I bid 3N thinking I was showing a spade stop and a diamond suit but needing help then partner is showing weakness so pass is in the frame
It's come up before and "using the methods of the partnership" has been interpreted in this sort of case as "using the methods you thought you were playing". The one I recall is where somebody opened a multi 2
♦ and heard it correctly announced by partner as an Acol 2, he was expected to carry on bidding his 6 card spade suit as if partner's bids were in response to a multi so 2
♦-2N was the strong enquiry instead of a negative etc and he was to carry on using the methods he played opposite his more regular partner where they played a multi.
**edit, there's no point polling whether 3
♦ or 3
♠ shows the good weak 2 in spades, opener will know, if it's clear cut min/max with no judgment involved there is only one bid he can make, but you can't poll to find out what it is.