Event: Division 2

Opponent Rating Result
Mick D Riding 1938 0 - 1
Robert PC Mitcheson 1700 1 - 0
John S Clarke 1809 0 - 1
Murray Pollock 1804 0 - 1
P Roy Bagnall 1870 0 - 1
J Robert Archer 1867 0 - 1
John S Clarke 1797 0 - 1
Ian B Chester 1732 ½ - ½
Sophie Seeber 1526 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1605 = (16043 + 400 * (2 - 6)) / 9)

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