Event: E Division

Opponent Rating Result
David Agyemang 1587 0 - 1
Ondrej Chalupa 1787 0 - 1
Mark Davis 1599 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1258 = (4973 + 400 * (0 - 3)) / 3)

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