ECO C63 · Ruy Lopez
Ruy Lopez: Schliemann Defense, Dyckhoff Variation
The position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3.
1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3
Ruy Lopez: Schliemann Defense, Dyckhoff Variation is filed under ECO C63, a variation of Ruy Lopez: Schliemann Defense. It is the position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 — 7 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.