Event: Division 3

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Opponent Rating Result
Andrew Williams 1365 ½ - ½
Steve Simm 1542 0 - 1
Xenia Hanganu 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

836 = (2907 + 400 * (0 - 1)) / 3)

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