Event: Rapidplay Cup

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Opponent Rating Result
Simon N Rogers 1694 1 - 0
Simon N Rogers 1694 ½ - ½
Martin Mitchell 2228 0 - 1
Martin Mitchell 2228 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1861 = (7844 + 400 * (1 - 2)) / 4)

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