Event: Division 2

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Opponent Rating Result
Dougie Buchanan 0 0 - 1
Erasmus Kahane 0 ½ - ½
Jack Lintern 1441 0 - 1
Doug May 1136 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

544 = (2577 + 400 * (1 - 2)) / 4)

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