My soft diamonds should have dissuaded me and partner's 3 Jacks should have dissuaded him.
Partner opened 1S. What would you do? I decided to mastermind a little, knowing that in robot tournaments I would hold the best hand. So, knowing that partner had opened a 11-count, I passed! Unfortunately, this was the full deal:
I averted total disaster by making 5 when I took a diamond finesse and East decided to cash the Ace of clubs and led a second club.
I should have masterminded a little more. Knowing that 1NT is 100% forcing, I should have bid it and passed partner's response. If the robot opened a 11-point hand, it would have been shapely and even a 2C response would shown real clubs.
Looking at the other tables, though, it appears that North rebids 2S (not 3S as I initially thought) and the Souths find ways to raise to 4S on that motley collection! What did those people know that I didn't?