Event: Internal Rapidplay August

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Opponent Rating Result
Richard Stevenson 1193 1 - 0
Andrew Salter 1229 1 - 0
Sam Stevenson 1161 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1328 = (3583 + 400 * (2 - 1)) / 3)

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