An entry in the Encyclopedia of Chess Openings (ECO A43), reached after 6 half-moves: 1. d4 Nf6 2. Nf3 c5 3. d5 c4.
1. d4 Nf6 2. Nf3 c5 3. d5 c4
No further variations branch from this position in our database. To explore neighbouring ideas: