Event: Division 1

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Opponent Rating Result
Stuart WC Clarke 209 0 - 1
Karl Lockett 153 0 - 1
Karol Grzybowski 146 1 - 0
David I Hulme 144 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-37 = (652 + 400 * (1 - 3)) / 4)

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