Event: Summer League Section 2a

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Opponent Rating Result
Jack Marcus Vernon 977 0 - 1
Darren Tomlinson 973 0 - 1
Mark Robinson 1375 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

975 = (3325 + 400 * (1 - 2)) / 3)

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