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Event: WMA Summer League Division 1

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Opponent Rating Result
Stephen D Mellor 0 0 - 1
Robert C Stern 160 0 - 1
Stephen D Mellor 0 0 - 1
Robert C Stern 160 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-220 = (320 + 400 * (0 - 3)) / 4)

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