Event: Summer Max 560 Division

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Opponent Rating Result
Dennis M Horsley 110 1 - 0
Robert Marks 116 0 - 1
Dennis M Horsley 110 ½ - ½
Robert Marks 116 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

13 = (452 + 400 * (1 - 2)) / 4)

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