Event: Division 2

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Opponent Rating Result
Ryan Chattopadhyay 1239 1 - 0
Cissy Bailey 0 1 - 0
Ray Rushworth 1600 1 - 0
Steve Tatlock 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1010 = (2839 + 400 * (3 - 0)) / 4)

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