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Event: Average under 1800

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Opponent Rating Result
NO'D James Alexander 1818 1 - 0
John E Dolamore 1794 1 - 0
Malcolm J Lightfoot 1400 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1937 = (5012 + 400 * (2 - 0)) / 3)

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