Posted 2011-February-04, 19:45
I think North may be worth 4♠, since I assume X was Majors... However it's unclear that's a cuebid. I think 4N should be natural, and 5♣ natural as well, so I have a lot of sympathy for 5♦... South has a very difficult call, I doubt I'd find a 6♦ bid at the table, but perhaps it could work it out on paper. I'd be in 5♦, this is a huge weakness for a strong club system though. In standard, after 1♣ there would be a lot less trouble finding the slam since South can envision a double fit with partner having a huge minor suit hand.
Yay for the "Ignored Users" feature!