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Event: Average under 1800

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Opponent Rating Result
Mark Lim 1900 ½ - ½
Darrell N Pigott 1863 1 - 0
David McNish 1776 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1980 = (5539 + 400 * (1 - 0)) / 3)

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