Event: IM Brown

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Opponent Rating Result
Howard Brears 122 ½ - ½
Geoffrey D Brown 148 0 - 1
Malcolm E Corbett 149 0 - 1
Matt Jones 126 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

36 = (545 + 400 * (1 - 2)) / 4)

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