Dangerously difficult. Musically profound. Absolutely worth the blisters.
Use of "four-voice close" chord voicings and rhythmic displacements. kapustin variations op 41 imslp
The piece is a set of jazz-classical fusion variations for solo piano based on the opening bassoon solo from Igor Stravinsky's Le Sacre du printemps (The Rite of Spring). Dangerously difficult