Event: Burns Summer Tournament

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Opponent Rating Result
David Barlow 2071 0 - 1
Yahya Durani 1402 1 - 0
Phil R Watson 2161 0 - 1
Ellis Howard 1624 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1615 = (7258 + 400 * (1 - 3)) / 4)

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