Event: Division 2

Opponent Rating Result
Peter Biggs 1686 1 - 0
Stephen W Berkley 1761 0 - 1
Keith B Cook 1661 ½ - ½
Luoke Wang 1551 1 - 0
Paul R Barclay 1804 ½ - ½
Jeffrey Page 1644 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1685 = (10107 + 400 * (2 - 2)) / 6)

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