Event: Division Two

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Opponent Rating Result
Charles V Van Der Westhuizen 139 ½ - ½
John Davis 117 0 - 1
Lawrence F Hayden 134 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-3 = (390 + 400 * (0 - 1)) / 3)

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