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Event: Average under 1800

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Opponent Rating Result
John A Feavyour 1400 1 - 0
Paul Spencer 1675 0 - 1
Cecil Sloan 1754 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1476 = (4829 + 400 * (1 - 2)) / 3)

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