Event: Division 2

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Opponent Rating Result
Andrew Cottom 1709 0 - 1
Paul Silverman 1665 ½ - ½
Soham Dhande 1404 1 - 0
Tom Stamper 1820 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1550 = (6598 + 400 * (1 - 2)) / 4)

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