The book is dedicated to one of the most popular debuts in our time - the Nimtsovich's Defence. The creator of this original opening is the grandmaster A. I. Nimtsovich. More than ninety years ago, he made a substantiation of this debut, enriching the theory and practice of chess with bold innovative ideas. Currently, the book is more of a collection value, but due to the relatively small size it can be used to familiarize yourself with the ideas of this debut.