Event: Internal Rapidplay August

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Opponent Rating Result
Ian Swales 0 0 - 1
Alex Jamieson 1271 0 - 1
George Butterworth 1069 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

380 = (2340 + 400 * (0 - 3)) / 3)

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