I knew about the Rules link (as i asked for it many years ago lol)
Ah, then you would remember! Good request.
For me, I knew it a long time ago too but a few weeks ago I was looking into the rules of different variants and couldn't find an easy way ... until I noticed that wee link that I had stopped seeing. ;o)
(hide) If you want to play a game with an opponent of a similar level, you can define a required BKR range for a new game invitation. Then nobody with a BKR outside this range will be able to see/accept it. (Katechka) (show all tips)