Event: Division 2

Opponent Rating Result
Jerry Humphreys 2033 ½ - ½
Richard Garrett 2030 1 - 0
Tommy Wilkins 1779 0 - 1
Stephen M Williams 1817 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2015 = (7659 + 400 * (2 - 1)) / 4)

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