Event: Division 2

Opponent Rating Result
Judith Heffer 1739 ½ - ½
Sam Harrison 1693 1 - 0
Simon Webber 1707 0 - 1
Alex Jacobs 1464 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1751 = (6603 + 400 * (2 - 1)) / 4)

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