Alschwang called Zack “a smart, subtle and careful artist”
Zack's performing personality has fully manifested itself already in his young years. He played very accurately, simply and technically, but at the same time in his game there was so much poetry, thoughtful contemplation, picturesqueness and breadth that it was impossible not to plunge completely into his performance. In the game of the pianist there was no over expression, simulated emotions, ostentatious virtuosity. He possessed a very subtle sense of proportion, the soft restraint of performance made his game indescribably expressive.
In his younger years, Jacob played rather intuitively, but over time, his performing style received a solid intellectual foundation. From his youth, Zack chose the right path in his understanding of musical performance, and over the years, his playing became even deeper, more thoughtful, even more meaningful.
Jacob Zack is a vivid example of how important the level of internal culture is for a performer. The richer the artist’s inner world, the wider and deeper his knowledge in various fields of art and science, the finer and more felt his performance will be. Zach’s play is an endless series of images and associations, as if the musician were unfolding before the listener more and more new pictures of the world, telling stories, asking questions. And all this can be heard in the long-known musical works - so subtly he plays them.
After the victory of Zach at the Chopin Competition, the work of this composer firmly entered the pianist's repertoire. He outplayed most of the works of the Polish composer. The musician often turned to Beethoven, and Variations on the theme of Diabelli and some of the later sonatas were especially vivid in his performance. Zach's concert repertoire included a huge number of works by Brahms, as well as Rachmaninov’s music. By the way, Zak celebrated the 20th anniversary of his creative activity with the program of Rachmaninoff’s compositions.
The pianist also enjoyed playing the works of Schubert and Metner.
Yakov Izrailevich Zack was very fond of performing Soviet music. At his concerts, one could very often hear Prokofiev (Transience, Sarcasm, Second and Third concerts, many sonatas ...).
Very often Zach turned out to be the first performer of large-scale compositions by such composers as Kabalevsky, Chamo, Chulaki, Bely, Koval, Levitin ... And once Zach gave a concert, the program of which consisted entirely of Soviet music.
Pedagogical activity of Jacob Zack