Event: League Division 3

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Opponent Rating Result
Nathaniel Mackenzie 1322 0 - 1
Richard Thornton 0 0 - 1
David Halpin 1201 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

708 = (2523 + 400 * (1 - 2)) / 3)

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