context: 1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... d8c7 It amazes me how Carlsen can play several different variations of the Sicilian as Black, all with equal skill. 6. c1e3  6... a7a6  7. a2a3 This move looks harmless, but it's more interesting than it seems. The main idea is to prevent the ...Bb4 that is so typical of the Taimanov Defense. Besides, a3 ends up being useful anyway in many variations, since it prevents b5-b4. 7... c6d4 Despite being a typical move, the knight exchange is rarely played in this order of moves. It will certainly become more popular after this game. 8. d1d4 The natural capture. 8... b7b5  9. f1e2 A smart move, keeping the option of castling on both flanks. 9... c8b7  10. e1c1 This leads to a position that has never been tested in classical grandmaster play. 10... a8c8  11. c1b1  11... g8f6  12. e4e5  12... f6d5  13. c3d5  13... b7d5 Now Black is fine since White has to lose a tempo in order to defend the c2-pawn. 14. e2d3  14... d5g2 Black could have simply finished development with an equal position, but Carlsen decides to capture the pawn, a bold decision that is approved by the computer. I suppose many humans wouldn't dare open the g-file, but Carlsen's instincts, sense of danger, and precision when evaluating a position aren't matched by anyone. 15. h1g1  15... g2d5  16. h2h4 The position remains far from clear. 16... g7g6  17. d4f4 Arjun decides to move the king to the side, giving the d4-square to the bishop if it becomes necessary to protect the e5-pawn. 17... f8e7  18. h4h5  18... h8f8 A solid move to protect the king. 19. e3d4 This move doesn't help White's position. 19... c7b7 Carlsen prepares the advance of the b-pawn. 20. g1g3  20... b5b4 Black is the one creating threats at the moment. 21. a3b4  21... b7b4  22. d3a6 Restoring material equality. It's curious that Black has captured a pawn on g2 and White one on a6, both opening files for the opponent's attack. 22... c8b8  23. a6e2  23... b8a8 The rook goes to a8 anyway. 24. b2b3  24... b4a5  25. d4b2  25... a5a2  26. b1c1  26... a8c8 Threatening to capture the pawn on b3. 27. c2c4  27... g6h5 An excellent move, taking advantage of the fact that the white pieces are trapped in the king's defense to create more tension on the other side of the board. 28. f4d4  28... h5h4  29. g3h3  29... f8g8 Taking the chance to control the g-file. 30. c1c2  30... a2a8  31. h3c3 The decisive mistake. 31... d5e4  32. e2d3  32... e4f3 White's pieces are clumsy and Black has the h-pawn advancing, the idea of Bc5 attacking the queen, and a rook that can go to g2. 33. d1a1  33... a8c6  34. d3h7  34... g8g2 Carlsen said in an interview that this move was kind of a bluff because he thought 35.Rf1 was holding for White. Which reminds me of a joke that can be adapted here: \"Do you know the only time Carlsen was wrong $2 When he thought he was wrong.\" 35. b2a3 Played in order to prevent ...Bc5, but now the h-pawn decides the game. 35... e7a3  36. a1a3  36... h4h3 Black is completely winning. 37. d4h4  37... h3h2  38. a3a1 