Event: Division 3

Opponent Rating Result
Neville H Twitchell 1963 0 - 1
Erasmus Kahane 1697 0 - 1
H Gokhan Kizilay 1741 ½ - ½
Djuna L Tree 1651 0 - 1
Junliang Chew 1822 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1615 = (8874 + 400 * (1 - 3)) / 5)

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