I am listening to this: https://www.youtube.com/watch?v=dWDqUSdG7NA and it has the title "Sonata No 9 | Frederic Chopin". I am trying to cross check the existence of the original piece and attribution to Chopin but I can't find it.
- Where can I find the source that would confirm that this piece is written by Chopin? Is it really a Chopin work?
- Where can I find the piano scores of it?
- Is there a live performance video by any solist playing this piece?
Thank you very much.