ECO C78 · Ruy Lopez
Ruy Lopez: Morphy Defense, Møller Variation
The position after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5.
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5
Ruy Lopez: Morphy Defense, Møller Variation is filed under ECO C78, 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.O-O Bc5 — 10 half-moves in, with White to move. Named theory ends here; beyond this the position is yours to work out.