Carlsen said he was slightly lucky because he  missed Black's Qa1+ to a4. "But it's not surprising there's a win there  considering how dodgy his position is."
1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. b1c3  3... d7d5  4. g1f3  4... f8g7  5. c4d5  5... f6d5  6. e2e4  6... d5c3  7. b2c3  7... c7c5  8. a1b1 In the 1990s this pawn sacrifice went under thorough check, long  before the computers became as strong as they are nowadays. There was  never a definite verdict of what the evaluation should be, but both  Grunfeld experts Vachier-Lagrave and Nepomniachtchi dare to play it  regularly. 8... e8g8  9. f1e2  9... c5d4  10. c3d4  10... d8a5  11. c1d2  11... a5a2  12. e1g1  12... c8g4  13. d2e3  13... b8c6  14. d4d5  14... c6a5  15. e3g5  15... a2a3  16. f1e1  16... g7c3  17. d1d3 The most logical reply that pins the bishop at once. 17... f8c8  18. e1d1  18... b7b6 Both the pawn and the knight are defended now,  but in the process Black weakens the light squares. 19. h2h3  19... g4d7  20. d1c1  20... f7f6 This, however is a mistake. 21. g5d2  21... c3b2  22. c1c8  22... a8c8  23. d3a6 Carlsen makes use of the queenside  weaknesses to finally get to the black king! 23... a3a2  24. b1b2 The most straightforward way. 24... a2b2  25. a6a7 