1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... f8e7  5. c1g5  5... h7h6  6. g5h4  6... e8g8  7. d1c2  7... c7c5  8. d4c5  8... d5c4  9. e2e3  9... b8a6  10. f1c4  10... a6c5  11. e1g1  11... a7a6  12. f1d1  12... d8e8 This has been  seen already and it is once again Dubov who demonstrates excellent  preparation as he uncorks a novelty. 13. c4e2 A tricky move. The  bishop is side-stepping the tempo Black might use with b7-b5 and gets  ready to occupy the long diagonal. 13... b7b6 Nakamura's play remains pretty straightforward which might  well be the reason for his opening choices. 14. b2b4 