Event: A Division

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Opponent Rating Result
Ethan Norris 2062 0 - 1
Paul F Cawley 2047 1 - 0
Joshua Pink 2068 0 - 1
Robert McLean 2108 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1971 = (8285 + 400 * (1 - 2)) / 4)

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