This is a perfect opening manual that contains a detailed classification. Modern Chess Opening, vol. 4, Semi-Closed Games (1. d4 Nf6 2. c4 g6) course is aimed at teaching a student much of the opening and middlegame methods and intricacies through a theoretical section which includes 266 games/lectures. Each of them illustrates typical plans and methods in the main variations of King's Indian defense and Gruenfeld defense. Also the program includes 368 exercises for a user to solve, giving refutations of the wrong moves as well as numerous hints to help you find the correct answer.