Event: Division 1

Opponent Rating Result
Andrew Smith 2125 0 - 1
John S Keaveney 1938 ½ - ½
Marek J Soszynski 1893 1 - 0
Steve Whatmore 1825 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1845 = (7781 + 400 * (1 - 2)) / 4)

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