Event: League

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Opponent Rating Result
Baha Tastan 0 0 - 1
Gary Bennett 0 1 - 0
Harry Hodkinson 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

133 = (0 + 400 * (2 - 1)) / 3)

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

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