Event: IM Brown

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Opponent Rating Result
John Gibbs 129 ½ - ½
Dave Gray 156 1 - 0
John S Neely 148 1 - 0
Richard Wilson 117 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

438 = (550 + 400 * (3 - 0)) / 4)

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