1. c2c4  1... e7e5  2. g2g3  2... g8f6  3. f1g2  3... f8c5  4. b1c3  4... c7c6 "He surprised with this move,  which I was not very familiar with." (So) What is interesting is that the  American GM knew that Ding has used this opening against Carlsen in  Stavanger, in one of the blitz games. He also remembered that Black did  great there too. 5. e2e3  5... e8g8  6. g1e2  6... d7d5  7. c4d5  7... f6d5  8. d2d4  8... e5d4  9. c3d5  9... c6d5  10. e3d4  10... c5b6  11. e2c3  11... b8c6  12. c1e3  12... c8e6  13. e1g1  13... d8d7 A novelty, and in my opinion, an inaccuracy. 14. c3a4  14... f8d8  15. a4b6 