Event: Essex OL Open Championship

Opponent Rating Result
David Gatheral 1600 0 - 1
George Horan 1890 1 - 0
Ian D Hunnable 1919 1 - 0
Andrew P Lewis 2310 0 - 1
Martin McCall 1976 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1859 = (9695 + 400 * (2 - 3)) / 5)

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