Event: Division 3

Opponent Rating Result
Stephen W Berkley 1779 0 - 1
Andrew Offord 1626 1 - 0
Ian P F Smith 1501 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1502 = (4906 + 400 * (1 - 2)) / 3)

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