Event: ECF Club

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Opponent Rating Result
Kian Bagherzadeh-Akbari 574 0 - 1
Roshan Lavan 838 1 - 0
Roshan Lavan 838 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

883 = (2250 + 400 * (2 - 1)) / 3)

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