Beethoven left 20 notebooks of variations for keyboard two hands, composed between 1782 and 1823, with the 33 Variations on a theme by Diabelli, Op.120. His oeuvre for four hands is reduced and curiously neglected, even the final version (Op.134) of the Great Fugue. He always refused to subscribe to the common practice of the time and let his symphonies be transcribed. Liszt laid hold of them as of 1837, profiting from the possibilities of the modern piano, followed by a number of other pianist-composers. The editions due to Hugo Ulrich (1827-72), then Xaver Scharwenka (1858-1924) were considered authoritative at the time.
PRD/DSD 250 219