1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. b1c3  4... e7e6  5. c1g5  5... b8d7  6. c4d5 This is an old method of sidestepping the Cambridge Springs Variation. 6... e6d5 The game has transposed into the Exchange Variation with one little twist: the white knight is already on f3. 7. e2e3  7... f8e7  8. f1d3 Ding has his own taste. 8... f6e4  9. g5f4  9... d7f6  10. e1g1  10... e8g8  11. f3e5  11... c8f5  12. d1c2  12... g7g6  13. f2f3  13... e4d6  14. g2g4 An important improvement. 14... f5d3  15. e5d3  15... f6e8  16. e3e4 White is making progress. 16... d5e4  17. f3e4  17... e8g7  18. a1d1  18... g7e6  19. f4h6  19... f8e8 Black is very short of space. 20. d4d5 Aided by a large advantage on the clock, Ding didn't hesitate to strike the iron while it was hot. 20... c6d5  21. c3d5  21... d6e4  22. d3e5  22... e4d6  23. c2f2  23... e6g5 Strange things begin to happen here. 24. g1h1 Was this move really needed $2 24... g5e4  25. f2f3  25... f7f6 