Star-studded occasions in chamber music come when the diverse paths of great artists cross on the concert stage for an evening of music together – and this concert promises to be just such an occasion. Tabea Zimmermann is quite simply one of the world’s finest viola players, and a chamber musician with some definitive recordings under her belt. It is a tribute to her extraordinarily broad range that, while contemporary composers from György Ligeti to Wolfgang Rihm have lined up to write works for her, she is equally at home with the classical repertoire. Jörg Widmann is likewise not only one of the best in the business on his chosen instrument, but also an active and prolific composer and a recipient of an Ernst von Siemens Prize for young composers. Dénes Várjon, as a dedicated guardian of Hungary’s long-established chamber music tradition, plays an important role in ensuring that the genre retains a prominent presence on today's domestic music scene. He maintains close and regular working relationships with prestigious festivals and outstanding individual musicians in Western Europe. In truth, the evening is mainly dedicated to the works of Schumann and Kurtág – to mark the occasion of the Hungarian composer’s 88th birthday – with the addition of a trio said to have been written by Mozart while playing skittles (hence the nickname Kegelstatt, bowling alley), and a 1993 composition by Widmann that has now become a staple of the clarinet repertoire. The interesting feature that connects the bulk of the works in the programme is the unusual combination of instruments. Before Mozart, no one had written a chamber piece for a trio of clarinet, piano and viola, though it is also true that the clarinet was still a relatively new invention at that time. Schumann later chose the same instrumentation in one of the works to be heard here, as did György Kurtág in his homage to Schumann.