Event: Division 2

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Opponent Rating Result
Ibrahim Sherif 1817 1 - 0
Oded Pilowsky Bankirer 1855 0 - 1
Konrad Scheffler 1918 0 - 1
Judith Heffer 1729 0 - 1
Alan PH Norman 1736 0 - 1
Anthony Chan 1782 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1540 = (10837 + 400 * (1 - 5)) / 6)

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