Event: Rapidplay

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Opponent Rating Result
Richard Player 118 0 - 1
Charles E Keen 141 ½ - ½
Charles E Keen 141 1 - 0
Richard Player 118 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

230 = (518 + 400 * (2 - 1)) / 4)

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