Event: Essex Summer Rapid Knockout

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Opponent Rating Result
Rahul Ghose 1623 1 - 0
Rahul Ghose 1623 0 - 1
Ashley Freeman 1939 0 - 1
Ashley Freeman 1939 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1581 = (7124 + 400 * (1 - 3)) / 4)

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