ECO B54 · Sicilian Defense
Sicilian Defense: Modern Variations, Main Line
The position after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6.
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6
Sicilian Defense: Modern Variations, Main Line is filed under ECO B54, a variation of Sicilian Defense: Modern Variations. It is the position after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 — 8 half-moves in, with White to move. From here theory names 2 continuations: Bc4, f3.