He keeps collecting.
1. d2d4  1... g7g6  2. e2e4  2... f8g7  3. g1f3  3... d7d6  4. c2c3 A very solid system. 4... g8f6  5. f1d3  5... e8g8  6. e1g1  6... c7c5  7. h2h3  7... d8c7  8. f1e1  8... e7e5  9. c1e3 Another solid move. 9... b7b6  10. b1d2  10... b8c6  11. a1c1  11... f8e8  12. d4d5 This is a very good moment to block the center, right after the  black rook has abandoned the f-file. Thus, the usual kingside counterplay  f7-f5 will start a couple of tempi later, and this will have an enormous  impact on the game. 12... c6e7  13. b2b4 Aronian's playground is on the  queenside. 13... f6d7 Naturally preparing the f7-f5 advance. 14. d2f1  A modest but excellent move. Aronian, however, only saw the hidden point  later. 14... c5c4  15. d3c2 And Artemiev goes for his planned 15... f7f5 A logical, obvious move, but Black is not quite prepared for  it! 16. e4f5 Opens the game for his excellent pieces. 16... g6f5  And this is definitely a mistake! 17. e3g5 It's hard to believe, but Black's position crumbles after this move. 17... e5e4 A bad sign. If the pawns need to move, then things are  grim. 18. f1g3 Very energetic, in the spirit of Aronian! His next moves  deserve exclamation marks as well. 18... e4f3  19. g3f5 The right  way to capitalize from the lead in the development. 19... d7e5  20. f5g7 Removing one of the active black pieces. 20... g8g7  21. e1e5 And then removing the last active piece. 21... d6e5 Aronian  is temporary down a whole rook, but with 22. d5d6 the tax collector knocks on Black's door... 22... c7d7  23. d1f3  23... e7g6 