Event: Folkestone Club Championship

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Opponent Rating Result
John B Atherton 1870 0 - 1
Otto Lucas 1090 1 - 0
Robert Twigg 1383 1 - 0
Alex Simmonds 1950 0 - 1
David Erwee 1533 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1645 = (7826 + 400 * (3 - 2)) / 5)

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