With the book "The Practice of My System", written in 1929 and translated into Portuguese in 2007, Aaron Nimzovitsch (Riga, 1886 - Copenhagen, 1935) presents the practical application of the concepts developed in "My System", through the detailed analysis of 109 games, of which he was one of the protagonists. The study of this book consolidates, in a practical way, the foundations of the Hypermodern School of Chess. In 1925, with the book "My System", Nimzovitsch revolutionized the strategic understanding of the game of chess, opening new paths for its theoretical development and creating the Hypermodern School, whose new theoretical concepts and practical approach to the game continue to have an impact to this day.