Event: Division 2

Opponent Rating Result
Nelson Strehse 0 1 - 0
Ian G Sandford 1879 1 - 0
Andrew M Gregory 1869 0 - 1
Alastair JD Marston 1710 1 - 0
A Clive Walley 1943 ½ - ½
Ian G Sandford 1879 1 - 0
David Painter-Kooiman 1934 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1716 = (11214 + 400 * (4 - 2)) / 7)

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