In 1836, Liszt introduced Chopin to Mme Dudevant, better known by her pen name George Sand, with whom he spent the winter of 1838-39 in Majorca; there, despite worsening pulmonary illness, he wrote his 24 preludes, which are counted among his finest compositions. The stormy affair with the novelist lasted until 1847, by which time Chopin's illness had developed into tuberculosis. He made a last concert tour through Great Britain in 1848.
Chopin established the piano as a solo instrument free from choral or orchestral influence. Even in the piano concertos in E Minor (1833) and F Minor (1836), the orchestra is completely dominated by the piano. Other major works include the sonatas in B Flat Minor (1840) and B Minor (1845), and two sets of études (1833, 1837). Because of their highly romantic quality, some of his works have become known by descriptive titles that he did not give them; they were published simply as nocturnes, scherzos, ballades, waltzes, impromptus, fantasies, and the like. Polish nationalism is evident in his many polonaises and mazurkas. His last concert was a benefit performance for Polish refugees, and at his funeral in Paris, Polish soil was strewn on his grave.
See his selected correspondence ed. by B. E. Sydow (1962); biographies by F. Niecks (2 vol., 1888, repr. 1973), H. Weinstock (1949), A. Walker, ed. (1966), J. Siepmann (1995), and T. Szulc (1998); studies by A. Gide (1949), A. Hedley (1957), D. Branson (1972), J. Samson (1985, 1996), and B. Eisler (2003).
See her complete works, ed. by P. Seyersted (2 vol., 1969) and ed. by S. M. Gilbert (2002); her private papers, ed. by E. Toth et al. (1998); T. Bonner, Jr., The Kate Chopin Companion (1988); biographies by E. Toth (1988 and 1999).
Étude Op. 10, No. 12 in C minor known as The Revolutionary Étude, is a solo piano work by Frédéric Chopin written circa 1831. It is the 12th of his first set of etudes - "Douze Grandes Etudes" dedicated to "son ami Franz Liszt" (his friend Franz Liszt). The two sets of Études, Opus 10 and 25, are known collectively as the Chopin Études, although Chopin also contributed three other lesser known études (the Trois Nouvelles Études).
Unlike études of prior periods (works designed to emphasize and develop particular aspects of musical technique, cf the much feared but essential School of Velocity, or the Five Finger Exercises by Hanon) the romantic études of composers such as Chopin and Liszt are fully developed musical concert pieces, but still continue to represent a goal of developing stronger techniques.
Although the greatest challenge lies with the relentless left hand semiquavers, the right hand is also challenged by the cross-rhythms which are used with increasing sophistication to handle the same theme in various successive parallel passages.
The left hand technique involved in this piece involves evenly played semiquavers throughout. The structure is of the strophic coda form (A A'). The opening broken chords (diminished chord with an added passing note) and downward passages transition into the main appassionato melody. The octave melody's dotted rhythms and the continuous accompaniment creates tension. At the end of the A' section, the coda provides somewhat of a rest from that tension and then the work recalls the opening in a final descending sweep leading to the final closing chords, in C major.