Event: ECF Club

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Opponent Rating Result
Vishahan Senthuran 641 0 - 1
Roshan Lavan 827 1 - 0
Roshan Lavan 827 0 - 1
Tanzim Amin 1177 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

668 = (3472 + 400 * (1 - 3)) / 4)

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