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 