I'm writing a fugue on the attached subject. (It's a cryptogram--I'm relieved it came out somewhat workable.)
Anyhow, by the end, the subject modulates to the dominant, which means that by the end, the answer must modulate back to the tonic. Or in other words, at the beginning I should answer a fifth up/fourth down, but by the end, I should answer a fourth up/fifth down. My understanding is that the precise point where this should happen is not always clear cut, so I'd like to get your opinions, especially if you have experience with writing fugues. What do you think?