1. e2e4  1... b8c6 My favorite childhood opening! 2. g1f3 The simplest reply. It  is an invitation for the "normal play" after 2....e5. 2... d7d5 which is rejected. Carlsen goes for a super-risky Scandinavian instead. 3. e4d5  3... d8d5  4. b1c3  4... d5a5  5. f1b5  5... c8d7  6. e1g1  6... a7a6  7. b5a4 The bishop should be kept for the time being. 7... g8f6  8. d2d3  8... e8c8 A novelty which does not inspire. 9. f3g5 This reveals one of the Scandinavian problems: the pawn on f7  is often in danger whenever Black castles long. 9... d7g4 Active  defense. 10. d1d2  10... g4h5  11. a4c6  11... b7c6  12. d2e1 Aronian acknowledges he did not choose  the right spot for his main attacker. 12... h7h6  13. g5e4  13... e7e6  14. c1d2 Natural, logical and... not the best. 14... f8e7  15. b2b3 A good plan. Aronian is bringing his knights closer to the optimal square on c5. 15... h5g6  16. c3a4  16... a5d5  17. e4g3 Oh, not this way. 17... c6c5 The world champion is immediately plugging the horrible  hole. 18. d2e3 And Aronian goes for the pawn. 18... f6g4  19. e1a5  19... g4e3  20. a5a6  20... d5b7  21. a6b7  21... c8b7  22. f2e3  22... d8a8 The  smoke has cleared. Black has lost a pawn but managed to swap the queens  and can rely on his bishop pair to generate counterplay in the future. 23. f1f4  23... e7g5  24. f4f3  24... c5c4 An important resource to bring bishops into  life. 25. d3c4  25... b7c6 But this was unnecessary. 26. g3e2  26... a8a4  27. b3a4  27... h8a8  28. e2d4 This in-between move is the  difference in comparison to before. 28... c6c5  29. d4b3 Aronian keeps  the a-passer alive and can sell it later for a decent price. White is much better again. 29... c5c4  30. h2h4  30... g5f6  31. a1d1 White indicates he is ready to part with the  exchange. 31... f6e5  32. a4a5  32... g6h5  33. d1d7  33... h5f3  34. g2f3  34... a8f8  35. f3f4 The endgame  remains hugely complicated, and with both players low on time inaccuracies are inevitable. 35... e5d6  36. a5a6  36... f8a8  37. d7f7  37... a8a6  38. f7g7  38... a6a2  39. g7g2  39... e6e5 The natural desire is to swap all  the pawns as soon as possible. 40. f4f5 No trades allowed. 40... c4c3  41. b3d2  41... a2a1  42. g1h2 Allowing the capture of his most important pawn. 42... c3c2  43. d2e4  43... c2d3  44. e4d6  44... c7d6 The tables have turned, and  Aronian needs to look for salvation. 45. g2g6  45... d6d5  46. g6h6 Now it is lost. 46... d3e3 The connected passers supported by both black pieces are  unstoppable. 47. h4h5 