1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... d8c7  6. c1e3  6... a7a6  7. d1d2  7... g8f6  8. e1c1 White plays the English Attack, a fashionable system against many variations of the Sicilian Defense. Note that the pawn is still on f2, so he is not yet committed the traditional f3-g4 attacking plan. 8... f8e7  9. f2f4 [%c_effect f4;square;f4;type;Interesting;persistent;true] An even more aggressive plan. 9... b7b5  10. e4e5  10... b5b4 The game becomes tactical and from the time spent it's clear that both players were trying to remember their analysis. 11. c3b5 [%c_effect b5;square;b5;type;Interesting;persistent;true] 11... a6b5  12. d4b5  12... c7b8  13. e5f6  13... g7f6  14. b5d6  14... e7d6  15. d2d6  15... b8d6  16. d1d6  16... a8a2  17. c1b1  17... a2a5 The rook is well-placed on the fifth rank, preventing White's bishop from going to b5. 18. e3b6 The first new move of the game. 18... a5a8 There's nothing really wrong with this move, but I think 19. f1b5  19... c6e7  20. h1d1  20... a8b8 A solid and good move. 21. b5d3  21... c8b7  22. g2g3 [%c_effect g3;square;g3;type;Inaccuracy;persistent;true] This is the case of a move that looks bad and is actually bad. It's too slow to simply protect the pawn when Black is preparing ...Nc8. 22... b7f3 [%c_effect f3;square;f3;type;GreatFind;persistent;true] The most accurate. 23. d1f1  23... f3g2  24. f1f2  24... e7c8 [%c_effect c8;square;c8;type;GreatFind;persistent;true] 25. b6c7  25... b8b7  26. f2g2  26... b7c7 Now Black is no longer in any mating danger and has an extra pawn, but b4 is a weakness. 27. d6d4  27... b4b3 [%c_effect b3;square;b3;type;GreatFind;persistent;true] 28. c2c3 [%c_effect c3;square;c3;type;GreatFind;persistent;true] 28... e8e7  29. d4b4  29... d7d5 Carlsen is in the kind of position he loves—an endgame with a small advantage. 30. b4b3 [%c_effect b3;square;b3;type;Inaccuracy;persistent;true] 30... c8d6  31. g2e2  31... f6f5  32. b1c2  32... h7h5 [%c_effect h5;square;h5;type;GreatFind;persistent;true] This is the problem. Black starts to put pressure on the kingside and the knight can jump to e4 at any time. If it's captured, Black gains a strong protected passed pawn. 33. b3b6  33... h5h4  34. c2b3  34... h4g3  35. h2g3  35... h8h3  36. e2g2  36... d6e4  37. b3b4 [%c_effect b4;square;b4;type;Inaccuracy;persistent;true] Wei decides to sacrifice the pawn on g3, but taking the knight would be less bad. 37... e4g3  38. d3b5  38... g3h5  39. b6b8  39... h5f4 With a huge material advantage one can think that against Carlsen this is already game over, but playing with seconds on the clock can be difficult even for him. 40. g2g8  40... e7f6  41. b4a5  41... c7a7  42. b5a6  42... h3h2  43. a5b6  43... a7e7  44. b2b4  44... d5d4 [%c_effect d4;square;d4;type;Interesting;persistent;true] A good practical move, freeing the d5-square for the knight. 45. c3c4  45... e6e5 There are passed pawns everywhere. 46. c4c5 