1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... f8b4  5. b1d2  5... e8g8  6. f1g2  6... b7b6  7. e1g1  7... c8b7  8. f3e5  8... a7a5  9. d1c2  9... a5a4  10. f1d1 This natural move is a novelty. The rook is  entering the battle while at the same time it overprotects the center. 10... b4d6 A useful retreat. 11. c4d5  11... e6d5  12. d2c4 Still good! 12... h7h6 Now, in comparison  with the line from above, it is Dubov's move. 13. c1f4 Playing for the  maximum. 13... f8e8  14. a1c1  14... b8a6  15. a2a3 The same policy of mounting more  pressure. The b4-square is under White's control, and the black knight is  stranded. Most likely this is how Carlsen would have played had he had the white pieces.