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Event: Average under 1800

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Opponent Rating Result
Chris Russell 1776 1 - 0
David McNish 1775 1 - 0
David Payne 1787 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2179 = (5338 + 400 * (3 - 0)) / 3)

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