Event: Preseason Rapidplay

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Opponent Rating Result
Shane Cooksey 1457 0 - 1
Andrew Goadby 0 1 - 0
Stephen Gaskell 1534 0 - 1
John Grant 1613 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

951 = (4604 + 400 * (1 - 3)) / 4)

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