“Allegro impetuoso” translates to “fast and impetuous.” The most crucial aspect when playing this piece is to never let the tension drop, not even for a moment. The fate of this piece hinges on that. It is necessary to express a sense of desperate psychological portrayal, which gradually escalates and knows no bounds. It is by no means a peaceful piece; the performance should maintain tension from beginning to end without release.

To achieve this, even in sections marked p (piano), a p filled with tension is desired, and a relaxed p is strictly forbidden.

By the way, let's analyze the first section. The first section spans measures 1-19. In measures 1-4, a crescendo builds towards measure 4. In measures 5-8, the volume becomes greater than in measures 1-4. Then, in measures 9-12, the volume further increases through two sequences, reaching forte at measure 13, but then becoming p at measure 14. Such places require particular attention. This p must be a p full of tension; it must not be a p that reassures the listener. And then again forte at measure 17, indicating a structure where tension escalates the further one proceeds.

FF (fortissimo) appears at measure 48. However, just because FF appears again at measure 60, one must absolutely not let the tension drop, for example, in measures 50-51 or 54-55. These sections should rather be considered as areas where the tension further increases.

This prelude contains such intense emotional expression that it could almost be marked molto agitato. Do not play it as a third-person observer or as background music. The tension must be maintained to such an extent that it feels oppressive to the listeners.