(6th) "Richter's friendship with Prokofiev dated back to their student years, and Prokofiev entrusted him with the premieres of the Sixth and Seventh Sonatas and wrote the Ninth Sonata for him". (7th) "a superb achievement" "a big wartime work... that can easily sound sentimental if played with less elegance than this, and a brilliant final toccata in 7/8 rhythm [Gramophone] (8th) "(the recording) is the Prokofiev 8th Sonata which encompasses breadth and depth in a way none can match"[Penguin Guide3*]"