Event: A Division

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Opponent Rating Result
John Robinson 1862 0 - 1
Paul Leonard 1647 1 - 0
Simeon Sakic 1932 0 - 1
Michael Tebelev 1892 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1633 = (7333 + 400 * (1 - 3)) / 4)

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