Baked Alaskan: Do you use a custom CSS - that can put the checkboxes elsewhere. (I guess you do since the background is a different color.)
Also try a different browser (with same CSS) and see if the checkboxes are there also. (That will help tell you if it is a problem with only Chrome, or something else like the CSS)
(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)