1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2  4... e8g8  5. a2a3  5... b4c3  6. c2c3  6... d7d5 From time to time, elite chess players try to achieve something in this variation with the white pieces, but my impression is that it is exhausted and it's nearly impossible to pose opening problems for Black. 7. g1f3  7... d5c4  8. c3c4  8... b7b6  9. c1g5  9... c8a6 This is good, but the alternatives also guarantee equality for Black. 10. c4a4 