The following table gives expected score levels for grading differences at 5 point intervals between 0 (expected score 0.5) and 400. It only gives the expected scores from the point of view of the higher player since the lower player's expected score can be readily calculated by deducting the higher player's expected score from 1. For example: If you play an opponent 320 points lower your expected score is 0.868. If you play an opponent 320 points higher your expected score is 1-0.868=0.132