ECO C64 · Ruy Lopez
Ruy Lopez: Classical Variation, Central Variation
The position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3.
1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3
Ruy Lopez: Classical Variation, Central Variation is filed under ECO C64, a variation of Ruy Lopez: Classical Variation. It is the position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 — 7 half-moves in, with Black to move. From here theory names 4 continuations: Bb6, Qe7, d5, f5.