Event: Division 2

Opponent Rating Result
Robin J Nandi 1900 0 - 1
Yaroslav Kolodiy 1934 0 - 1
Steve Burnell 1794 ½ - ½
Marco Checchi 1750 1 - 0
Phil Eastlake 1838 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1683 = (9216 + 400 * (1 - 3)) / 5)

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