Event: IM Brown

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Opponent Rating Result
David J Hambly 0 ½ - ½
Chris R Tinker 0 1 - 0
Jim E Vickery 0 ½ - ½
Anthony Ibbitson 0 ½ - ½
Mark W White 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

80 = (0 + 400 * (1 - 0)) / 5)

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