An entry in the Encyclopedia of Chess Openings (ECO D27), reached after 13 half-moves: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4.
No further variations branch from this position in our database. To explore neighbouring ideas: