Event: IM Brown

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Opponent Rating Result
Geoffrey D Brown 148 ½ - ½
Chris R Tinker 129 ½ - ½
Clive W Davies 159 ½ - ½
Matt Jones 126 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

41 = (562 + 400 * (0 - 1)) / 4)

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