The Grunfeld is an energetic and popular defence to queen's pawn openings and is a favourite of the world number one Garry Kasparov. From the start of the game Black allows White to build an apparently strong centre but then attacks it with all his forces. Play can become extremely sharp and theoretical and this opening very much appeals to dynamic players. In this book, International Master Jacob Aagaard revisits the fundamental principles of the Grunfeld and its numerous variations. Throughout the book there are an abundance of notes, tips and warnings to guide the improving player, while important strategies, ideas and tactics for both sides are clearly illustrated.