Variations and Fugue on a Theme by J.S. Bach Op. 81 (Piano Solo). Composed by Max Reger (1873-1916). Edited by Egon Voss. For Piano. Piano (Harpsichord), 2-hands. Henle Music Folios. Pages: XII and 48. SMP Level 9 (Advanced). Softcover. 60 pages. G. Henle #HN493. Published by G. Henle (HL.51480493).
About SMP Level 9 (Advanced)
All types of major, minor, diminished, and augmented chords spanning more than an octave. Extensive scale passages.