Questions & Answers about Sei avançar o peão, mas agora não consigo.
Why does the speaker use sei in the first half but não consigo in the second half?
This perfectly highlights the difference between these two verbs! Sei (from saber) means you have the learned knowledge or skill—you know the rules of chess and how a pawn moves. Consigo (from conseguir) refers to the ability to actually execute the action in the moment. By saying não consigo, the speaker means that despite knowing how the piece works, they are currently blocked or unable to make the move on the board.
What if the speaker had said mas agora não posso instead? Would that change the meaning?
Yes. If they said não posso (from poder), it would sound more like they don't have permission, or perhaps a specific rule forbids the move in this exact scenario (like putting their own king in check). Não consigo focuses on the situational inability to complete the action, such as another piece physically blocking the pawn's path.
I've seen peão used for pedestrians. Does it mean the same thing here?
Peão does mean "pedestrian" (someone walking on the street), but it is also the word for a "pawn" in chess. Because the sentence talks about advancing it (avançar) and the context of knowing a skill but being currently blocked, it refers to a chess pawn here.
Why does the sentence end at consigo? Shouldn't it be não consigo avançá-lo?