This course is aimed at club and intermediate players and presents the theory and playing hooks in the most sharp and deciding variations of the Sicilian Defense developing after moves 1. e4 c5 2. Nf3 d6 3. d4: the Dragon variation, the Najdorf variation, the Scheveningen variation and the Richter Attack. The course presents a deep overview of the actual variations, featuring 200 examples and 630 exercises. The course will be useful to all chess players employing the Sicilian Defense on either white or black sides. This course is in the series Chess King Learn (https://learn.chessking.com/), which is an unprecedented chess teaching method. In the series are included courses in tactics, strategy, openings, middlegame, and endgame, split by levels from beginners to experienced players, and even professional players. With the help of this course, you can improve your chess knowledge, learn new tactical tricks and combinations, and consolidate the acquired knowledge into practice. ...