Thanks very much. I appreciate it.

Kramnik scored 6 1/2 points out of 9 points (1 point for win, 1/2 point fro draw, 0 point for loss).  The +4 is that he had 4 wins and no losses (the rest draws).  He won 4 games and drew 5 games for a total of 4 + 2.5 or 6.5 points  out of 9 games.