Sicilian Defense is the most popular and most extensively analyzed chess opening in which Black responds to White's 1.e4 with 1...c5.

Basic Idea

Black exchanges the c-pawn for White's d4 pawn, creating an asymmetrical center. This gives Black an open c-file and chances for counterplay.

Popular Variations

• Najdorf Variation: 5...a6 - Bobby Fischer's favorite
• Dragon Variation: Black fianchettoes with g6 and Bg7
• Sveshnikov Variation: 5...e5, putting pressure on the center