Event: Division 2

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Opponent Rating Result
Amy Lovatt 144 ½ - ½
Grenville Cross 120 1 - 0
Samuel A Parry 129 0 - 1
Roger J Edwards 130 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

231 = (523 + 400 * (2 - 1)) / 4)

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