Event: Uxbridge - Watford (rapidplay)

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Opponent Rating Result
Tiger Suryaatmadja 1099 0 - 1
Tiger Suryaatmadja 1138 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1119 = (2237 + 400 * (1 - 1)) / 2)

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