Event: A Division

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Opponent Rating Result
Lorand Sakic 1948 ½ - ½
Robin IR Wilding 1795 1 - 0
Amy Lovatt 1831 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1858 = (5574 + 400 * (1 - 1)) / 3)

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