Event: Division 3

Opponent Rating Result
Alan Clarke 1860 ½ - ½
Michael Townsend 1843 0 - 1
Dave J Williams 1665 0 - 1
Alastair JD Marston 1722 ½ - ½
David C Neagle 1759 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1610 = (8849 + 400 * (0 - 2)) / 5)

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