The first movement of Sonata No.6 (1939-40) by Sergei Prokofieff is full of military suggestion, terror and conflict. The fierce tension of the opening pages is momentarily relieved by the melancholy of the second theme. The ingenious development exploits the second theme as it soars in octaves over virtuosic material consisting of repeated figures and first theme fragments. The fury of the development reaches orchestral proportions before the powerful recapitulation. The second theme reappears abridged and the movement draws to a disturbing close.