Chess Opening Theory/1. e4/1...e5/2. Nf3/2...d6/3. d4/3...Nd7
This more clogs up Black's queenside and slightly weakens f7. However, this is not bad, only slightly inaccurate. The best move is 4.Bc4, when explosions on f7 can occur any moment. The only good move then is 4...exd4, with a solid but passive game for black.