An entry in the Encyclopedia of Chess Openings (ECO D45), reached after 9 half-moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3.
1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3
No further variations branch from this position in our database. To explore neighbouring ideas: