Event: Division 3

Opponent Rating Result
David Carter 1510 1 - 0
Lynne Fursman 1620 0 - 1
Dave R Wingrove 1397 0 - 1
Ian Webster 1479 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1502 = (6006 + 400 * (2 - 2)) / 4)

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