2.2) I don't remember my password and the email address registered with my account is not valid anymore.
In this case, you can try to send us an email to info@brainking.com and describe as many information about your account as possible. If we decide that the mentioned account really belongs to you (which is never guaranteed and, honestly, there is a low chance at all, due to security reasons), you will be sent a new password. Otherwise, the only option is to open a new BrainKing account.
(kaŝi) Se vi volas ludi kontraŭ ludanto de simila nivelo, vi povas difini intervalon de BKR ĉe invito al nova ludo. Tiukaze neniu kun BKR ekster tiu intervalo povos vidi/akcepti ĝin, (Katechka) (Montri ĉiujn konsilojn)