This video shows two cases of a basic checkmate pattern that everyone should know. Even if you have seen the Bishop and Rook mate before, check out the second situation for a fun version that can occur even when your opponent’s king is not in the corner.
I’m guessing that this mate has some official name, but I like to think of it as a triangle mate, because the Rook and Bishop form sort of a triangle shape.
For some reason I have trouble remembering to check for this basic checkmate pattern, both in my games and in Chess.com’s Tactics Trainer. It’s always good to keep an eye out for this pattern though, because the threat can come up in games where your opponent has a weakened kingside structure and no bishop to protect the long diagonal.