Event: Division 1

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Opponent Rating Result
Nigel D Fleming 2069 0 - 1
Diana M Serbanescu 2030 1 - 0
Thomas B Bonn 2255 0 - 1
David L Haydon 2338 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1973 = (8692 + 400 * (1 - 3)) / 4)

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