Event: IM Brown

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Opponent Rating Result
Alan S Metcalfe 138 1 - 0
Paul Howden 140 1 - 0
Dale H Cullum 134 1 - 0
Martyn Hamer 189 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

350 = (601 + 400 * (3 - 1)) / 4)

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