An entry in the Encyclopedia of Chess Openings (ECO E24), reached after 7 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3.
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3
3 replies continue into sub-variations from this position. Click any to drill deeper.