An entry in the Encyclopedia of Chess Openings (ECO B02), reached after 13 half-moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Nc3 Nxc3 6. dxc3 d6 7. Bg5.
No further variations branch from this position in our database. To explore neighbouring ideas: