Event: D Division

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Opponent Rating Result
Nathan Harvey-Jones 1742 1 - 0
Leo Cheung 1583 ½ - ½
Sean M Lightbown 1582 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1636 = (4907 + 400 * (1 - 1)) / 3)

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