The fighting choice against 1.e4. Each variation is its own world.
2.Nf3 d6 3.d4 — the main battlefield · 9 lessons
5...g6 — fianchetto the bishop
5...a6 — the most popular
5...e5 — fight for d5
6.Bg5 — Richter-Rauzer Attack
4...a6 — flexible Sicilian
4...Nc6 — knight before pawn
4...g6 — fianchetto without d6
2.c3 — solid alternative
5...e6 — small center, big plans