A 600-rated player just started a game with me. I'm basically rated 1200. How in the world did we get paired together when there's a nearly 600-point difference between us?
FYI: it's not unrated.
It will depend on the challenge settings. If you sent out a random challenge your range was wide enough for your opponent to accept it.
https://support.chess.com/en/articles/8598433-how-do-i-choose-what-rating-my-opponents-are
You can always abort with no penalty
A 600-rated player just started a game with me. I'm basically rated 1200. How in the world did we get paired together when there's a nearly 600-point difference between us?
FYI: it's not unrated.