An entry in the Encyclopedia of Chess Openings (ECO E40), reached after 8 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6
No further variations branch from this position in our database. To explore neighbouring ideas: