An entry in the Encyclopedia of Chess Openings (ECO E10), reached after 6 half-moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Ne4.
1. d4 Nf6 2. c4 e6 3. Nf3 Ne4
No further variations branch from this position in our database. To explore neighbouring ideas: