Event: Division 2

Opponent Rating Result
Tim Reisner 1700 0 - 1
Edward Small 1884 1 - 0
Robert Ashworth 1877 ½ - ½
Benjamin Lappin 1939 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1850 = (7400 + 400 * (1 - 1)) / 4)

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