The difficulty level of the Rondo Alla Turca can vary depending on the performer's skill and experience. It is a relatively fast and lively piece, with a quick tempo and a range of technical challenges. Here are a few factors that contribute to its difficulty:
1. Finger technique: The piece features rapid and intricate finger passages that require a high degree of dexterity and coordination. The constant alternation between the right and left hands can be challenging, especially at a fast tempo.
2. Rhythm and articulation: The Rondo Alla Turca has a syncopated rhythm and a marcato (accented) style of articulation. This requires the performer to have precise control over their timing and accentuation to achieve the desired musical effect.
3. Dynamic range: The piece features sudden and contrasting changes in dynamics, from soft (piano) to loud (forte). This requires the performer to have good control over their touch and dynamics to bring out the expressive nature of the music.
4. Pedaling: The effective use of the sustain pedal is essential in this piece to connect notes and create a smooth legato line. However, overuse or incorrect pedaling can muddy the texture and make the music sound unclear.
5. Memorization: As a performance piece, the Rondo Alla Turca is often played without sheet music, requiring the performer to have a strong memory for the notes and phrasing.
Overall, while the Rondo Alla Turca is not considered one of the most technically challenging pieces in Mozart's repertoire, it still requires a solid technique, good musicianship, and attention to detail to perform it effectively. It is typically classified as an intermediate-level piece for pianists.