Event: Division 4

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Opponent Rating Result
Andy While 1500 ½ - ½
Mohamed Elmaghrbi 1599 0 - 1
Nikolai Harrison 1448 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1516 = (4547 + 400 * (1 - 1)) / 3)

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