The work of the ninth world champion Tigran Petrosyan is a bright and peculiar page of chess art. Petrosyan's unique style of play was distinguished by strategic depth, a subtle understanding of the position and an inimitable art of prevention. At the same time, the ninth world champion had an excellent sense of dynamics and sharp combination vision, as evidenced by the numerous diamond games included in this collection. The works of T. Petrosyan, commented by himself, will become an excellent guide for readers to study positional play. For educational purposes, the parties are divided into thematic sections, each of which is preceded by a short introduction.