A good novelty by Yu. Black finishes the development and solves his opening problems.
1. c2c4  1... e7e5  2. b1c3  2... f8b4  3. c3d5  3... a7a5  4. g1f3  4... d7d6  5. a2a3  5... b4c5  6. e2e3  6... g8f6  7. d2d4  7... f6d5  8. c4d5  8... e5d4  9. e3d4  9... c5b6  10. c1g5  10... f7f6  11. g5e3  11... e8g8  12. f1d3  12... f6f5  13. d1c2 