This went three down, due to some bad splits 4♠ is the only game that makes.
After 3♥ they had no further agreements. How to proceed and make the decision between 3NT and 4♠ (or maybe even 4♥)?
In practice North took 3♠ as cuebid and forward going for a ♣ slam. And from there the bidding went astray. But even if you think 3♠ is natural should North bid 3NT in case he has something like x AKQxx Jx AQxxx?
It seems difficult to bid the South hand in a Gazzilli structure. Anyone a solution?
Edit: ♦ slam was edited in ♣ slam.
arvie asks "Kibitzing two friends in a teams game you see the following hand: This went three down, due to some bad splits 4♠ is the only game that makes. After 3♥ they had no further agreements. How to proceed and make the decision between 3NT and 4♠ (or maybe even 4♥)?"
IMO the auction is an advert for Gazzilli up to 4♠. Then North's 5N = 60%. South's final pass = 40%.