Event: Atkinson Cup

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Opponent Rating Result
Tom Tallentire 1550 1 - 0
Christopher J Harris 1438 1 - 0
Bryan Hesler 1751 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1980 = (4739 + 400 * (3 - 0)) / 3)

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