Event: Division 2

Opponent Rating Result
Robin W Haldane 2065 0 - 1
David W Guthrie 2205 0 - 1
Stefanus Phan 2187 ½ - ½
Sean M Ingle 1872 0 - 1
Michael St J Brown 1969 0 - 1
Ian D Hunnable 1907 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1834 = (12205 + 400 * (1 - 4)) / 6)

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