An entry in the Encyclopedia of Chess Openings (ECO A08), reached after 7 half-moves: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4.
1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4
No further variations branch from this position in our database. To explore neighbouring ideas: