At BBO, my wife and I ran into an interesting hand.
The essence was that Opener has a three-loser hand (xx-void-AKQ10-AQJ10xxx) and Responder has a nice collection with a double fit (Ax-KJxx-xxxx-Kxx). The same basic problem could also arise with any other long suit and any other 4-piece.
The auction started with the 7-4 hand describing a long, powerful club suit via 2♣-P-2♦(GF)-P-3♣. As you can see, 6♣ is icy as hell, but 7♦ makes on a 3-2 split. Bidding 7♦ on this, when you need a 3-2, seems like a bit much, but give Responder five small diamonds. ♠Ax ♥KJx ♦xxxxx ♣Kxx.
The solution for this kind of a problem evades me at the moment. There may be no solution, for that matter, but I still wonder if there might be some general operating procedures for more frequently checking/showing alternative strains for slam purposes. Some conventions, like a 3M rebid after a 2♣ opening to show a 6-4 hand with diamonds and the indicated major, serve this additional function well.
The pattern bidding inverted spiral relay lunatics who can unwind a 6520 hand with four bids might like problems of this nature. As I am an empathetic cuebidding wrap-around yummy toes implied LTTC Type II lunatic, I am also curious.
Of course, this does remind me of the story I heard about Rodwell coming up with 30-some pages of system notes revisions to ask for a Jack for grand slam purposes and the reaction of almost putting the man out of his misery. Bah! 40-some pages might be too much, but only 30-something?
Anyway... Any ideas of thoughts? Maybe the auction is easier after a simple 1♣ opening. Hmmm.