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Event: Average under 1800

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Opponent Rating Result
David E McLean 1400 0 - 1
Edward Knox 1625 1 - 0
Patrick C Ribbands 1735 0 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1513 = (3025 + 400 * (1 - 1)) / 2)

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