An entry in the Encyclopedia of Chess Openings (ECO D31), reached after 9 half-moves: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3.
1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3
No further variations branch from this position in our database. To explore neighbouring ideas: