1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. c1d2 This is considered to be one of the  most harmless continuations against the Nimzo-Indian, but it was used in  the past by Alekhine. 4... e8g8  5. g1f3  5... c7c5  6. a2a3  6... b4c3  7. d2c3  7... f6e4  8. a1c1  8... b7b6  9. g2g3  9... c8b7  10. f1g2  10... e4c3 Aronian hurries to get rid of the bishop pair. 11. c1c3  11... c5d4  12. d1d4  12... b8c6  13. d4d2 An obvious move and a novelty,  which both players were hardly aware of. 13... d8e7  14. e1g1  14... f8d8 Now a Hedgehog pawn structure arose in which  both sides traded a couple of minor pieces. White has some pressure along  the d-file, but Black's position is as solid as a rock. His last move  prepares the freeing d7-d5 break, therefore: 15. e2e4  15... a8c8  16. f1d1  16... d7d6  17. b2b3 An important prophylaxis. 17... c6e5  18. f3d4 Artemiev needs to keep some minor pieces on the board if he wants to play for something. 18... a7a6  19. c3e3 White continues maneuvering. 19... e7c7 Getting ready for counter-actions. 20. h2h3  20... h7h6  21. d2b2 The queen steps out of the X-raying rook. 21... c7c5  22. a3a4  22... g8f8 Aronian decided to defend his only weakness with his king,  but this might be risky... 23. g1h2  23... a6a5  24. b2e2  24... e5c6  25. e3d3  25... c6d4 Finally Black traded the annoying  knight. 26. d3d4 