An entry in the Encyclopedia of Chess Openings (ECO C53), reached after 17 half-moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. O-O d6 7. a4 a6 8. h3 Nf6 9. Re1.
No further variations branch from this position in our database. To explore neighbouring ideas: