Event: Division 1

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Opponent Rating Result
Stephen Ward 155 0 - 1
Robert Morris 143 ½ - ½
Peter Dickinson 116 0 - 1
Andrew A Clarkson 192 0 - 1
Andrew Swales 0 1 - 0
Mike J Conroy 154 0 - 1
Paul Smith 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-6 = (760 + 400 * (2 - 4)) / 7)

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