Event: E Division

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Opponent Rating Result
(John) Jack Donegan 1310 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

910 = (1310 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Svetlana Popova 1000 1 - 0
Alexander Lang 1263 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1132 = (2263 + 400 * (1 - 1)) / 2)