CSGibson, on 2012-October-04, 00:27, said:
If they haven't discussed it, then nothing is required/obliged to be disclosed. It appears that South was hoping that his general bridge knowledge was the same as N's general bridge knowledge.
Playing a specific convention is not general bridg knowledge.
I sometimes play with pickup partners, and often by the time people are paired up and seated the boards have already been given out. There is little time, while removing the cards from the boards, to agree more than opening suit lengths and 1NT range; so a lot of assumptions have to be made, based on the bridge culture we both inhabit. Are these agreements? I think that, in a sense, they are. When 1m-1M-1NT is alerted, it is explained as "checkback Stayman" (well, not by name, but by description) Should we say there is no agreement when we both know what it is?
Now, in these pickup partnerships, defense to 1NT is usually agreed after a board in which we or the opponents have opened 1NT. Before that, I would assume that all bids are natural.
This is why I think that there may have been
some sort of agreement, however amorphous; perhaps based on the methods of a partner they both have played with. I do not think that players pluck artificial bids out of thin air; they believe that there is some basis for partner to be on the same wavelength.
As for East's bidding, I would not have bid 2
♠ the first time around, but would have protected on the way out. Unless there was something else going on? Did North suspect, based on looking at a convention card or by South's manner or by some other clue, that the opponents were having a misunderstanding, and that a transfer bid had been left in? What should he do now -- try for an average board when the misunderstanding could mean that he was booked for a top? I am not sure what the right course in a case like this is.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones -- Albert Einstein