Event: A Division

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Opponent Rating Result
Dale R James 2075 0 - 1
Peter J Mulleady 1989 0 - 1
Jeff Mason 1773 1 - 0
Foivos Patrik Tzortzakos 1940 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1944 = (7777 + 400 * (2 - 2)) / 4)

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