Prepare Chopin’s complete Étude in C-sharp minor, Op. 10 No. 4, keeping the melodic direction and changing hand roles clear inside the fast texture. Reduce a difficult span to its main line and bass before restoring the notes. Rehearse a complete take, identify where clarity changed, and use that evidence to choose the next passage. Alternatively prepare the complete Op. 25 No. 1, projecting its singing line through the flowing figuration, or Op. 10 No. 1, following the bass and harmonic direction through the wide arpeggios. The Three against four card is a separate review example from Fantaisie-Impromptu, not a description of every study offered here.