Event: Division 3

Opponent Rating Result
Simon Fitzgerald 1218 1 - 0
Andrew Walker 1399 0 - 1
Simon Johnson 1838 1 - 0
Andrew C Wainwright 1997 0 - 1
John E Parr 1440 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1658 = (7892 + 400 * (3 - 2)) / 5)

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