Event: Open

Opponent Rating Result
John Mildenhall 159 1 - 0
Daniel M Lambourne 188 0 - 1
Keith R Ingram 175 1 - 0
Simon C Smith 160 1 - 0
Ann-Marie James 175 1 - 0
John Mildenhall 159 0 - 1
Daniel M Lambourne 188 0 - 1
Keith R Ingram 175 1 - 0
Simon C Smith 160 0 - 1
Ann-Marie James 175 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

251 = (1714 + 400 * (6 - 4)) / 10)

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