Event: IM Brown

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Opponent Rating Result
Richard E Desmedt 141 1 - 0
Jael De Sousa Muachikape 127 0 - 1
Ian M Thackray 114 ½ - ½
Stuart M Johnson 117 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

25 = (499 + 400 * (1 - 2)) / 4)

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