Black chooses to develop with Bd6-Nge7. Other options are possible: Nf6-Be7, Bd6 with Nf6, and even Nge7-Ng6-Be7. In all cases the game is even.
1. g1f3  1... d7d5  2. g2g3  2... c7c5  3. f1g2  3... b8c6  4. c2c4  4... d5d4  5. e1g1  5... e7e5  6. d2d3 