Sicilian Defense
Also known as: Sicilian, الصقلي, Najdorf, Dragon, Open Sicilian
Family: Semi-Open Game (1.e4 c5)
Open Sicilian — Najdorf
The most famous Sicilian setup: the flexible ...a6 prepares ...e5 or ...b5 and queenside play.
White perspective
Lesson steps
Main line
Branch
Decision
Trap / motif
If you play White
Develop fast (Nf3, Nc3, a bishop to e2/c4/e3), castle and attack; in the Dragon castle queenside and storm h4–h5–g4.
Plans
- Knight to d4, then Nc3 and a bishop to e2/c4/e3
- Break with f4–f5 or e4–e5
- Plant a knight on the d5 outpost
- Castle and attack the king
- Watch ...Ng4 and ...Qb6 hits on f2/b2
Core idea
Black declines the symmetrical 1...e5 and fights for d4 from the side. After ...cxd4 Nxd4 Black gets a central pawn majority and a half-open c-file for queenside play, while White develops faster and attacks. Once the c5–d4 tension resolves, it becomes a race of opposite-side plans: White at the king, Black down the c-file.
AI coach explanation (later)
Later, the ThinkMate coach will use verified opening facts and team-authored notes to provide an interactive explanation.