Event: IM Brown

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Opponent Rating Result
Simon N Anscombe 158 ½ - ½
Richard Wilson 117 1 - 0
Peter J Clark 111 1 - 0
Vivien Webster 137 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

431 = (523 + 400 * (3 - 0)) / 4)

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