Event: IM Brown

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Opponent Rating Result
Peter Shaw 194 0 - 1
Norman G Andrews 128 1 - 0
Joe Varley 156 0 - 1
Steve Parker 163 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-40 = (641 + 400 * (1 - 3)) / 4)

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