ECO C77 · Ruy Lopez
Ruy Lopez: Morphy Defense, Anderssen Variation
The position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3.
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3
Ruy Lopez: Morphy Defense, Anderssen Variation is filed under ECO C77, a variation of Ruy Lopez: Morphy Defense. It is the position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 — 9 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.