Event: Division 3

Opponent Rating Result
Brian M Hayward 1665 1 - 0
Paul Wileman 1638 0 - 1
Jonathan Ellinsfield 1532 0 - 1
David Erentz 1670 0 - 1
Martyn Winn 1715 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1484 = (8220 + 400 * (1 - 3)) / 5)

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