Samuel Barber - Fuga (from Sonata for Piano Op.26) 

S.barber Sonata for Piano Op.26 4th mov 'Fuga'
One of the most important works of the 20th century, it was composed using the 12-tone technique. The 4th movement Fuga was composed at Horowitz's request. Difficult techniques and attractive music give many pianists the will to challenge themselves.