1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. g1f3  3... a7a6 This cunning little move threatens to capture on c4 followed by the protection of the pawn with ...b7-b5. White usually captures on d5, which in some ways is desirable for Black since the light-squared bishop can be developed. The big question is whether it's worth \"wasting\" a tempo with ...a6 for this, although even this move is useful in a number of situations. 4. c4d5  4... e6d5  5. b1c3  5... h7h6 [%c_effect h6;square;h6;type;Interesting;persistent;true] Another subtle pawn move with the idea of preventing the development of White's bishops. Super-GMs are above the common laws of opening play. Carlsen has played this system a few times already. 6. c1f4  6... g8f6  7. e2e3  7... f8d6  8. f4e5 [%c_effect e5;square;e5;type;Interesting;persistent;true] An interesting idea: instead of exchanging bishops, White places it on e5 and waits for Black to capture it in order to place the knight or a pawn on that square. 8... c7c6  9. f1d3  9... e8g8  10. h2h3  10... f8e8  11. e1g1  11... d6e5  12. f3e5 The most natural and conventional capture, but I should mention that taking with the pawn has interesting practical value. It has never been tried before and sharpens the game. Black needs to defend accurately. 12... c6c5  13. a2a4 [%c_effect a4;square;a4;type;Interesting;persistent;true] A good prophylactic move to prevent the move ...b7-b5. 13... c5d4  14. e3d4  14... b8c6 Black has many candidate moves and enjoys near-equality with them. 15. e5c6  15... b7c6  16. a4a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] Fixing the pawn structure before Black can play a5 himself. 16... a8b8  17. d1d2  17... f6e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] Black achieves comfortable equality now. 18. c3e4  18... d5e4  19. d3c4  19... d8d6  20. f1e1  20... c6c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] 21. d4d5  21... c8d7  22. a1c1  22... f7f5 [%c_effect f5;square;f5;type;GreatFind;persistent;true] Black starts advancing the pawns on the kingside while the passed d-pawn is well blocked. But the position is still equal. 23. d2c3  23... f5f4  24. c4f1 Bringing the bishop back to the defense and attacking the c-pawn. 24... b8c8  25. c3b3  25... e4e3 [%c_effect e3;square;e3;type;GreatFind;persistent;true] 26. f2e3  26... f4f3 A very interesting pawn sac that forces White to find the difficult moves to defend. 27. e3e4 [%c_effect e4;square;e4;type;Mistake;persistent;true] Allowing a second pawn sac that begins a wonderful king hunt. 27... f3f2 [%c_effect f2;square;f2;type;Brilliant;persistent;true] 28. g1f2  28... d6h2 [%c_effect h2;square;h2;type;GreatFind;persistent;true] A fantastic idea. The king is caught in the middle of the board. The attack is objectively winning. 29. b3e3 [%c_effect e3;square;e3;type;Inaccuracy;persistent;true] This makes things even worse, but even after the computer suggestion 29... c8b8 [%c_effect b8;square;b8;type;GreatFind;persistent;true] 30. b2b3  30... e8f8 [%c_effect f8;square;f8;type;Inaccuracy;persistent;true] This is an inaccuracy, but it's very difficult to spot the winning line. 31. f2e2  31... c5c4 [%c_effect c4;square;c4;type;GreatFind;persistent;true] The third pawn sac of the game. 32. b3c4  32... b8b2  33. e2d3  33... h2e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] Preparing a deadly check on b3. 34. c1c3 The only move. This is a very interesting position that can be analyzed for hours. Due to time limitations, I'll limit myself to pointing a few interesting ideas and variations. 34... d7a4  35. f1e2 [%c_effect e2;square;e2;type;Inaccuracy;persistent;true] Not the best defense, but the moves for White and Black are all hard to find. 35... f8f2 [%c_effect f2;square;f2;type;Inaccuracy;persistent;true] A fantastic idea, but not enough for a win. 36. e3c1 [%c_effect c1;square;c1;type;GreatFind;persistent;true] The only way to defend. 36... f2g2 [%c_effect g2;square;g2;type;GreatFind;persistent;true] 37. c1b2  37... g2g3  38. d3d2 [%c_effect d2;square;d2;type;Blunder;persistent;true] White should be mated after this. 38... e5d4 [%c_effect d4;square;d4;type;Mistake;persistent;true] Carlsen missing mate in two is a rare occasion. 39. e2d3  39... g3d3 [%c_effect d3;square;d3;type;Mistake;persistent;true] It was still possible to reorder the queen route to deliver mate. 40. c3d3  40... d4b2 To be honest, even after missing the mate, Black is still winning. But those passed pawns give some hope with little time on the clock. 41. d2e3  41... a4c2  42. e1e2  42... b2c1  43. d3d2  43... c1g1  44. e2f2  44... g1e1  45. f2e2  45... e1g1  46. e2f2  46... c2a4 [%c_effect a4;square;a4;type;Mistake;persistent;true] 47. c4c5  47... g1c1 [%c_effect c1;square;c1;type;Inaccuracy;persistent;true] 48. c5c6 [%c_effect c6;square;c6;type;Mistake;persistent;true] 48... c1c5  49. e3f3  49... a4b5 [%c_effect b5;square;b5;type;Mistake;persistent;true] After this move, Black cannot win anymore. 50. d2c2 [%c_effect c2;square;c2;type;GreatFind;persistent;true] 50... c5a3 