Larry,
Can Ireverseif partner is a passed hand? What if there's competition? My partner says NO! I say Yes!
A: Of course you canreverseopposite a passed hand! Just because your partner passed, doesn’t mean you can’t have been dealt a big hand – enough to reverse.
As to “in competition,” – areverseon your auction does show extras. If opener is minimumish, he should notreverse– even if the opponents come into the auction. So, you will be happy to know you were correct on both counts!
Your partner should have a stopper in their suit to bid notrump.
Don’t expect your partner to be happy upon hearing all this – but it is 100% reliable information. -Larry