Event: ECF Club

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Opponent Rating Result
Roshan Lavan 651 0 - 1
Roshan Lavan 651 0 - 1
Kian Bagherzadeh-Akbari 592 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

498 = (1894 + 400 * (1 - 2)) / 3)

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