Event: Division 2

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Opponent Rating Result
Richard Garrett 2037 0 - 1
Brent Perrin 1961 ½ - ½
David C Egginton 1665 ½ - ½
Stephen M Williams 1808 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1668 = (7471 + 400 * (0 - 2)) / 4)

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