An entry in the Encyclopedia of Chess Openings (ECO D05), reached after 9 half-moves: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3.
1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3
No further variations branch from this position in our database. To explore neighbouring ideas: