An entry in the Encyclopedia of Chess Openings (ECO A81), reached after 7 half-moves: 1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3.
1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3
No further variations branch from this position in our database. To explore neighbouring ideas: