Event: Division 1

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Opponent Rating Result
Andrew Peters 0 0 - 1
George Markovic 137 1 - 0
Steve Whitehead 154 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-36 = (291 + 400 * (1 - 2)) / 3)

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Opponent Rating Result
Sam Walmsley 108 0 - 1
Ray Sutcliffe 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-146 = (108 + 400 * (0 - 1)) / 2)