Event: Rapid Play League

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Opponent Rating Result
Sam Jacklin 1649 0 - 1
Sam Jacklin 1649 1 - 0
Mike Hegan 0 0 - 1
Mike Hegan 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

825 = (3298 + 400 * (2 - 2)) / 4)

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Opponent Rating Result
Bergmann Adalsteinsson 0 0 - 1
Bergmann Adalsteinsson 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 2)) / 2)