Event: Open County Championship

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Opponent Rating Result
Robert R Sanders 2010 1 - 0
Vivash Samarakoon 0 0 - 1
Norman A Hutchinson 1994 0 - 1
Timothy Lunn 2060 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1316 = (6064 + 400 * (1 - 3)) / 4)

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