1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... f8c5  5. a2a4 Just the 10th most popular move in this position. All sorts of move orders are possible in the Italian Opening. 5... d7d6  6. e1g1  6... a7a5  7. c1e3  7... c5e3  8. f2e3  8... e8g8  9. b1d2  9... c6e7 This natural move is a novelty. Black wants to move the knight to g6 and play …c6-d5. 10. f3h4 The standard reply. 10... c7c6  11. d1e1 The queen goes to g3, supporting the attack. 11... d6d5  12. c4b3  12... d8d6 This is a small inaccuracy that gives White the initiative. 13. e1g3 The e5-pawn is now pinned and White is ready to make use of this by playing d3-d4. 13... f6h5 A good defensive move, removing the queen from its unpleasant position. 14. g3g5  14... g7g6 This is a dangerous choice. It was better to return the knight to f6. 15. h4f5 This is a rushed move that closes the f-file and allows Black to level the game again. 15... c8f5  16. e4f5  16... g8g7 The f-file is closed and the bishop on b3 is no longer so dangerous. Black has a fine position. 17. g1h1 This move is not very useful. 17... d6f6 Forcing a queen exchange. 18. g5f6  18... h5f6  19. f5g6  19... h7g6 The best way to capture, opening the h-file. 20. e3e4  20... d5e4  21. d3e4  21... a8d8  22. f1f2  22... d8d4 Not the best, since now the e7-knight will be forced into an awkward square. 23. a1f1  23... e7g8  24. c2c3  24... d4d7  25. f2e2 Protecting the pawn and preparing Nc4. 25... d7e7  26. b3c2  26... f6d7  27. d2c4  27... f8a8  28. g2g4 A compromising move that weakens the dark squares, although this mistake was not immediately exploited by Carlsen. 28... f7f6  29. e2g2 White's g-pawn advance is now justified. 29... g8h6  30. g4g5  30... f6g5 