1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. f1b5  3... b8d7 A clear indicator that Black wants to keep as many pieces on the board and is ready for risky play. 4. b5a4  4... g8f6  5. e1g1  5... a7a6  6. c2c4  6... e7e6  7. b1c3  7... f8e7  8. d2d4  8... c5d4  9. f3d4 It all  transposed into a Hedgehog setup with a slightly weird-placed  light-squared white bishop. 9... e8g8  10. d1e2  10... d8c7  11. a4b3 More or less  necessary prophylaxis. 11... b7b6  12. c1e3 An obvious development and a novelty. 12... c8b7  13. f2f3  13... a8c8 Carlsen consistently prepares the Hedgehog d6-d5  and b6-b5 breaks in return. 14. a1c1  14... f8e8  15. f1d1  15... c7b8  16. b3a4 This is a positive side of the active placement of the bishop. It is normally safer  on f1, but can never show activity from there. Nakamura also frees the  road for his b-pawn. 16... c8c7 The c-file is weakened for a moment, and the world champion  puts pressure on it at once. 17. b2b4 Very consistent play by Nakamura. He already prepared a nice piece sacrifice. 17... e8c8  18. a4b3  18... b6b5 Carlsen is also very consistent, but this break is very risky. 19. c3b5 The point behind White's play. Nakamura wins a bit of  material and above all gains a nice mobile pawn chain on the queenside. 19... a6b5  20. d4b5  20... h7h5 Black definitely needs kingside counterplay  urgently. 21. a2a4 Nakamura decided that the speed of the pawns is more important  than the exchange. 21... h5h4  22. a4a5  22... h4h3 Now Carlsen definitely has enough counterplay. 23. c1a1  23... h3g2  24. b5c7  24... b8c7  25. b4b5  25... b7a8  26. d1b1 More preparation is needed. 26... d6d5 But this means that Carlsen will have time to open up the  center. Once the white kingside has been destroyed, this plan works great  for Black. 27. b5b6  27... c7e5  28. f3f4  28... e5c3  29. e2e1  29... c3d3 The queens should be kept. 30. b3a4  30... d7c5  31. a5a6 At last. 31... c5a6  32. b6b7  32... a8b7  33. b1b7  33... e7c5  34. b7b3  34... d3c4 The sharp battle is over, and White's position is left in  ruins. 35. e3c5  35... a6c5 Carlsen is following a forcing line that leads him  to an almost won endgame. 36. b3b4  36... c4f1  37. e1f1  37... g2f1q  38. g1f1  38... c5d3  39. b4d4 After this, White cannot survive. 39... d5e4  40. f4f5  40... e6f5  41. a4d7  41... f6d7  42. d4d7  42... c8c2  43. a1a8  43... g8h7  44. a8e8  44... h7g6  45. e8e7  45... g6g5  46. e7f7  46... g7g6  47. d7d6  47... c2h2 