For his solo recital, Denis Kozhukhin—who will perform chamber works by Galina Ustvolskaya later in the season together with the Boulez Ensemble—pairs Schubert’s Impromptus with Jörg Widmann’s Idyll und Abgrund (“Idyll and Abyss”), a contemporary take on the ambiguity in the Romantic composer’s music. After the intermission, Ravel’s Sonatina is followed by Douze Notations, the first fully acknowledged composition by 20-year-old Pierre Boulez, and Prokofiev’s Sonata in B-flat major, written just a few years earlier during World War II.