Event: IM Brown

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Opponent Rating Result
C Rodney S Mitchinson 98 ½ - ½
Barry Williams 115 1 - 0
Samuel J Playford 123 ½ - ½
Kenneth L Marsden 79 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

304 = (415 + 400 * (2 - 0)) / 4)

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