An entry in the Encyclopedia of Chess Openings (ECO C50), reached after 9 half-moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d4.
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d4
No further variations branch from this position in our database. To explore neighbouring ideas: