What violin grade is Czardas and what Nocturne in C sharp minor?

Czardas is a traditional Hungarian dance that has been arranged for many instruments, including the violin. The difficulty of a particular arrangement of Czardas can vary depending on the skill level of the performer, but it is typically considered to be an intermediate to advanced-level piece.

The Nocturne in C sharp minor is a composition for solo piano by Frédéric Chopin. It is considered to be one of the most difficult pieces in the piano repertoire, and is typically only played by professional pianists.