This is a perfect opening manual that contains a detailed classification. Modern Chess Opening 2 - Semi-Open Games (1. e4) course is aimed at teaching a student much of the opening and middlegame methods and intricacies through a theoretical section which includes 426 games/lectures. Each of them illustrates typical plans and methods in the following variations of Sicilian Defense: System 2. c3, Scheveningen, Rauser Attack, Chelyabinsk variation, the systems with e7-e5, Dragon variation, Najdorf variation, Paulsen system, Closed system (2. Nc3), Moscow variation (2. Nf3 d6 3. Bb5), Rossolimo variation (2. Nf3 Nc6 3. Bb5), etc. Also the program includes 232 exercises for a user to solve, giving refutations of the wrong moves as well as numerous hints to help you find the correct answer.