Event: Summer Cup

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Opponent Rating Result
David Hooper 1152 0 - 1
Oliver Grabowski 880 1 - 0
Luke Smith 1387 0 - 1
Mathew Wilson 1480 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1025 = (4899 + 400 * (1 - 3)) / 4)

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