Event: Essex OL Open Championship

Opponent Rating Result
James Evans 1635 ½ - ½
Jay Sharman 1553 1 - 0
Russell P White 2104 1 - 0
David A Sands 2269 0 - 1
Harry Z Zheng 1914 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2055 = (9475 + 400 * (3 - 1)) / 5)

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