In what way is this book special? How can it make someone a better player? These are perfectly legitimate questions and whenever I buy a new chess book, I essentially ask the same ones. The short answer is that this book will give you a comprehensive understanding of the chosen openings. Unlike many other books with a similar profile, it goes beyond pure theory and in addition to giving a great deal of practical advice, it touches on issues such as sample games, typical tactical strikes and, in the last chapter, endgames. On top of all this, a homework section enables you to immerse yourself in a given topic and achieve an in-depth understanding of it in your own time. We follow this structure because as a coach, I know how important it is to receive as much guidance as possible on a new opening. Only this can lead to true mastery. Let me recommend this book to any player who wants to learn more about closed openings, adopt a new approach to chess and build up a thorough and sophisticated repertoire. I have tested these openings with my students with good results, so I believe this book is suitable for anyone with an Elo rating from 1600-2500. This book aims to provide a complete overview of a 1.d4 repertoire against five main openings (King’s Indian Defense, Grünfeld Defense, Slav Defense, Benoni Defense, and Catalan systems after 1.d4 d5), offering analysis of classical games and typical tactical motifs to provide an in-depth understanding of the associated middlegames. A concluding chapter explores typical endgames that are likely to arise from 1.d4. Each chapter includes a thorough discussion of a particular opening, answering questions such as what types of players choose it, which world champions played it, or how games typically proceed afterwards.