Event: Division 3

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Opponent Rating Result
Nick J London 142 ½ - ½
David Griffiths 125 1 - 0
Terry WT Lavelle 123 1 - 0
Mike Hunter 121 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

428 = (511 + 400 * (3 - 0)) / 4)

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