An entry in the Encyclopedia of Chess Openings (ECO A04), reached after 6 half-moves: 1. Nf3 f6 2. e4 Nh6 3. d4 Nf7.
1. Nf3 f6 2. e4 Nh6 3. d4 Nf7
No further variations branch from this position in our database. To explore neighbouring ideas: