Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The competition was contested by 32 clubs in a knock-out format where all rounds were played over two legs and the away goals rule was used, but in the first three rounds, if the away team won the first leg with an advantage of at least three goals, the second leg would not be played and the club would be automatically qualified to the next round.
Duque de Caxias/CEPE
Foz do Iguaçu
27'