Mastering the Sicilian Defense
Quite simply put the Sicilian Defense is the most popular and most complex of opening systems in chess. It has been the favorite of top players throughout modern times. There are a number of systems and variations to choose from such as the Scheveningen, Dragon, Najdorf, Boleslavsky, Kan, etc. There are also a number of sharp, complex, theoretical systems and that is why it is aptly named The Sicilian Jungle.