The last five sonatas (No 6–10) are marked by their evident connection with Skriabin's last completed score of “Prometheus” (1910) so as the unrealized plot of the “Mystery”. Here the composer resorts to his own discoveries in the sphere of thematical elaboration and harmony. The Sixth Sonata op. 62 was created together with the Seenth one during the period of 1911–1912. It was for the first time, when the contemporaries witnessed that “flabbergasting innovative harmonoc fluctuations” to be exhibited in full swing.