Event: IM Brown

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Opponent Rating Result
Vivien Webster 137 ½ - ½
Christopher Lund 120 ½ - ½
John Grasham 129 ½ - ½
Sri Sriharan 111 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

224 = (497 + 400 * (1 - 0)) / 4)

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