The composition "1.X.1905", commonly known as "Sonata", was produced in the fall of 1905, at the height of the unrest between the Czech and German-speaking communities of Brno, homeland of Janá_ek. In response to the violent death of a Czech worker, Janá_ek wrote a three-part piano composition, originally titled "From the Street, October 1, 1905". Unhappy with this work, he would have, before the first performance, first burned the third movement in the fireplace, then threw the two remaining movements into the Moldau. A copy of these first two movements, according to which the first edition was later published, has also disappeared. This is why the urtext edition of Éditions G. Henle and Universal Edition is based exclusively on its first publication published in 1924, carefully analyzed and commented on for this edition by the expert from Janá_ek Ji_í Zahrádka.