The Nimzo-Indian Defence has been one of the most trusted defenses against 1.d4 ever since its conception a century ago. It has been used in World Championship matches by Fischer, Karpov, Kasparov, Kramnik, Anand and Carlsen. The Nimzo-Indian combines fast development with a solid pawn structure and great flexibility, which is why champions with such varied styles all gravitated towards it. This book supplies an elite repertoire built upon positional principles, offering active piece play and a fight for the initiative.