4.2) I play a game with an unrated player. How does it affect my BKR?
Each player has a BKR although it is not displayed. Players start with BKR = 1300 and the BKR is not shown until he/she finishes at least 4 rated games. Furthermore, BrainKing displays estimated values of your particular BKR change below the selected game board, depending on the game result (win, draw or loss).
(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)