[%c_effect f4;square;f4;type;Inaccuracy;persistent;true]
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. e1g1  4... f6e4  5. f1e1  5... e4d6  6. a2a4 Carlsen has many small weapons he successfully employs to create practical problems against the solid Berlin Defense. 6... f8e7  7. b1c3  7... a7a6  8. b5f1  8... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] Considered by opening theory the best way to equalize. 9. c3e4  9... d6e4  10. e1e4  10... d7d5  11. e4e1  11... d5d4 Another good move, gaining space in the center. 12. f1d3 [%c_effect d3;square;d3;type;GreatFind;persistent;true] A clever way to improve the bishop's position. 12... c8e6  13. d3e4  13... e6d5  14. d2d3  14... e8g8  15. c1f4 Among the many things that Carlsen masters, the ones that cause me the greatest admiration are knowing how to take the game to positions that are equal but not drawn and knowing in which of these positions he can put pressure on the opponent. This is a textbook example. No one can disagree that the position is equal at the moment. 15... e7b4  16. e1e2  16... a8c8 Defending the c-pawn. This move is a novelty. 17. f4d2 [%c_effect d2;square;d2;type;GreatFind;persistent;true] Necessary to develop the queen and double heavy pieces on the e-file. 17... b4e7  18. d1e1  18... d5e4  19. e2e4  19... f7f5 [%c_effect f5;square;f5;type;Inaccuracy;persistent;true] This pawn advance is questionable since there's no need to weaken the position. 20. e4e2  20... e7f6  21. b2b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] Preparing the unpleasant b4-b5. 21... d8d5  22. h2h4 [%c_effect h4;square;h4;type;Inaccuracy;persistent;true] A classic move, gaining space on the kingside. However, there is an even more accurate move. 22... h7h6 [%c_effect h6;square;h6;type;GreatFind;persistent;true] Avoiding the bishop exchange. 23. d2f4  23... g8h7  24. e1d2  24... f8e8 A move that has a tactical idea to recover the pawn that is sacrificed on c7. 25. e2e8  25... c8e8  26. f4c7  26... f6e7 [%c_effect e7;square;e7;type;GreatFind;persistent;true] This is Black's idea. 27. b4b5  27... a6b5  28. a4b5  28... d5b5  29. d2f4  29... e7f6  30. h4h5 White still maintains some pressure, as Black potentially has three weaknesses: the f5-, d4-, and b7-pawns. However, it's not easy to exploit them. 30... h7g8  31. f4d6 Considering the difficult move that Black could have played, which I'll discuss next, we can understand that the machine's move 31.Qc1 is more accurate, with the idea of exchanging queens after Qb1 and pressing in a similar way to what we will see later in the game.