Teams of 8.
4♠x= NS +790
The issue was that S thought that the 1N showed clubs, so 2♣ would not be natural. N didn't. There is no real agreement here. N has no UI, can do what he likes. If 2♣ was natural, would be a pretty big hand, 14+ unless it had alot of clubs, so the 2♠ bid is normal, S passing it isn't consistent with this, N now has a pretty good idea what's going on.
The only bid that I think can be questioned is the final 4♠. I wasn't sure what I should do here. If I pass 3N, partner knows what's going on from when I pass 2♠ and will lead a spade for 3N-2. Since both our EW pairs made 5♣, one of them doubled, we were scoring a huge board whether we get +100 or +790 (and the match was still 20-0) so there was no serious appeal.
Any thoughts ?