Event: Division 1

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Opponent Rating Result
Graham K Brown 148 0 - 1
Robert Ashworth 159 0 - 1
Patrick Baker 133 ½ - ½
Alex Hope 126 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-159 = (566 + 400 * (0 - 3)) / 4)

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