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In page Sviatoslav Richter:

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Richter also conducted the premiere of Prokofiev's Symphony-Concerto for cello and orchestra. This was his sole appearance as a conductor. The soloist was Rostropovich, to whom the work was dedicated. Prokofiev also wrote his 1949 Cello Sonata in C for Rostropovich, and he and Richter premiered it in 1950. Richter himself was a passable cellist, and Rostropovich was a good pianist; at one concert in Moscow at which he accompanied Rostropovich on the piano, they exchanged instruments for part of the program.[citation needed]