An entry in the Encyclopedia of Chess Openings (ECO E46), reached after 9 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2
No further variations branch from this position in our database. To explore neighbouring ideas: