Event: West of England Counties Online Championship

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Opponent	Rating	Result
Terje Lundin	1200	1 - 0
Arnold Acibar	1700	1 - 0
Amanda Jones	1200	1 - 0
Y Jan Rodrigo	1784	1 - 0
Chris Lowe	2018	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1820 = (7902 + 400 * (4 - 1)) / 5)