Event: Steele Cup

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Opponent Rating Result
Mark Towlson 101 0 - 1
John L Clarke 92 1 - 0
Graeme Boxall 86 ½ - ½
Graeme Boxall 86 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-9 = (365 + 400 * (1 - 2)) / 4)

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