This caprice seems to me to be the natural evolution and outgrowth of the 24 Caprices by Locatelli, especially of the 24th and  last etude from this series titled ” The Harmonic Labyrinth”. Locatelli uses a triplet arpeggiated figure to represent the recurring  theme and Paganini uses a quadruplet arpeggiated figure with greater intricacy and complexity in his 1st caprice, nicknamed ” L’ Arpeggio “.

The second caprice in B minor features awkward string crossings at high speeds.

The third caprice is a study of fingered octaves with a perpetual motion middle section. It has what I consider to be the single most difficult finger stretch in the entire series: a unison double trill on E above middle C. I wonder if it was problematic for  Paganini…