Event: Division 3

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Opponent Rating Result
Keith W Roper 138 0 - 1
Mike Hunter 121 0 - 1
Mike Hunter 121 0 - 1
Keith W Roper 137 0 - 1
Allan J Brown 107 ½ - ½
Chris A Fraser 121 1 - 0
Terry WT Lavelle 123 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

10 = (868 + 400 * (2 - 4)) / 7)

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