No. 1, 'Tremolo' (G minor), comprises an introduction and coda derived from Paganini's 24 Caprices, No. 5, and a main section based on 24 Caprices, No. 6. Throughout approximately the first third of the main section, the original version, Études d'exécution transcendante d'après Paganini, exhibits several technical challenges compared to the revised version, Grandes études de Paganini. For instance, the tremolo passage in the original version must be executed 'by the left hand alone'.