Event: Division 3

Opponent Rating Result
Chris A Fraser 1567 1 - 0
Martyn Winn 1715 0 - 1
Barry T Redburn 1622 1 - 0
Keith W Roper 1655 0 - 1
Andrew Johnson 1500 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1532 = (8059 + 400 * (2 - 3)) / 5)

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