Notifications on the Apple Watch are currently pretty unreadable: You have to scroll past a large black square to get to the actual text when your opponent has made a move. The image should either show something useful like the actual board or be omitted entirely.
As it turns out, my opponent actually had a large black square as a profile picture. Still, I’d say showing a gigantic version of the profile picture at the top of the notification is not very useful. I’d rather see the user name, move and (ideally) the board.