Event: Division One

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Opponent Rating Result
Mike J Hollier 1833 0 - 1
Robert Grimes 1765 1 - 0
Tony Preece 1822 0 - 1
Victor J Brown 1563 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1746 = (6983 + 400 * (2 - 2)) / 4)

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