Why are BKRs limited to separate ratings for each type of game? Why not have a BKR for all backgammon variants combined? One for chess, one for Pente, etc. Also why not an overall BKR for each player covering all (rated) games played regardless of game type. Yes, I know this would lead to a bit of apples to oranges comparison, because good chess players are more likely to win consistantly than good backgammon players due to the luck of the dice, but I still think it would be a great addition to this site.