No questions were asked during the auction. Before I led, I asked what dummy had shown with her sequence. It was Lebensohl, of course, and "showed a game raise with a heart stopper". And sure enough, that's what she had. "Does it show anything about spades?" "No."
Of course, we were playing transfer overcalls of NT in direct seat. It's amazing what you can do if you don't ask.
(Also, of course, declarer had sufficient spade stop. Yes, I'm still annoyed at this one, almost 20 years later.)
Yep, this never happens.
But having said that, in the original case:
1) Get a better explanation from East of "asking for more about partner's hand". That's clearly incomplete, and may in fact cause things to be different in law if not in fact (and, assuming N/S knew E/W's system as well as they claim to, may explain some of the "obvious" decisions below). But we can assume it's an artificial relay, and shows...what? It's a club raise provided they actually have the suit? Strength?
2) Find out whether South knew 1
♦ was conventional. Especially because "the cards speak", and they say otherwise; this will require some convincing. Doesn't mean I can't be convinced, of course.
3) Find out why North didn't Alert the double (likely "he knew it was conventional as well"; but find out. A "takeout" double of a natural 1
♦ call would also be not Alertable; and North may not know the regulations well).
4) Find out why North didn't raise with a clear blocking raise, if he knew 1
♦ was conventional and double showed diamonds. Also: poll to see if it truly is a clear blocking raise.
5) Decide if I'm going to adjust on anything.
If it is made clear to me that everyone knew what that 1
♦ meant and knew that everyone knew, then no law was violated, and the result was a successful bidding assault. It's just that there is *so much* that arouses suspicion that I'm going to investigate things. In the EBU, we'll have to look at traffic-lighting the psychic or the misbid (whatever we decide it is), as well.
It is clear that no matter what happened, E/W were properly informed of N/S agreement (even if by sheer luck), so there's no ruling based on MI (unless N/S actually have an implied understanding based on whether they ask or not). There may be a ruling based on use of UI, or CPU (traffic-light rulings for Fielded Psychics/Misbids are CPU rulings in disguise); but I can't see a straight MI ruling.
I would investigate whether E/W are one of those pairs that play "if we confuse 'em with our system, and get a good score, that's a win; if we confuse 'em, and they get a good score, we look to the TD", too. There might easily be a split-and-weighted score coming.
(It sounds here like I think everybody's trying one on. I don't. But enough pairs that do play these games, deliberately or otherwise, exist that I have to check.)
When I go to sea, don't fear for me, Fear For The Storm -- Birdie and the Swansong (tSCoSI)