An entry in the Encyclopedia of Chess Openings (ECO E21), reached after 10 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4
No further variations branch from this position in our database. To explore neighbouring ideas: