Event: Division Two

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Opponent Rating Result
Christopher D Lewis 1979 0 - 1
Andrew Smith 2152 0 - 1
Julian H Summerfield 1838 ½ - ½
David Gardiner 1874 ½ - ½
Nick W Roberts 1864 ½ - ½
Sathya Vaidyanathan 1857 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1861 = (11564 + 400 * (1 - 2)) / 6)

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