1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. b1c3  4... e7e6  5. c1g5  5... b8d7  6. e2e3  6... d8a5  7. c4d5  7... f6d5  8. a1c1  8... h7h6  9. g5h4  9... d5c3  10. b2c3  10... f8a3  11. c1c2  11... b7b6  12. f1e2  12... c8a6  13. e1g1  13... a6e2  14. c2e2  14... e8g8  15. c3c4 Ding is slowly building his advantage in the center. 15... f8e8  16. d1c2  16... a8c8  17. f1d1  17... a3f8 Duda, on his turn, prepares to  strike back in the central area.