Event: Division One

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Opponent Rating Result
Alan K Crombleholme 173 0 - 1
Carlos Bryant 119 1 - 0
David W Gostelow 165 ½ - ½
Mike Hadley 160 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

254 = (617 + 400 * (2 - 1)) / 4)

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