[%c_effect e6;square;e6;type;GreatFind;persistent;true] An excellent square for the rook.
1. d2d4  1... g8f6  2. c1g5 Even Carlsen recognizes the brilliant discovery of Octávio Trompowsky, the 1939 Brazilian chess champion who supposedly invented or popularized this opening. 2... d7d5 Black ignores the knight capture on f6, which was assumed to be a \"threat\" when this variation was invented. White, for his part, completely ignores the knight, even when the bishop is provoked by the h-pawn. Such are modern times. 3. e2e3  3... c7c5  4. b1d2  4... b8c6  5. c2c3  5... c5d4  6. e3d4  6... h7h6  7. g5h4  7... c8f5 In terms of theory, Black solves his problems when this bishop can be developed so easily. 8. g1f3  8... e7e6  9. f1e2  9... f8d6  10. e1g1  10... d8c7 Firouzja is a very aggressive player and he delays castling because he is eyeing an attack on the kingside. 11. h4g3  11... d6g3  12. h2g3  12... h6h5 [%c_effect h5;square;h5;type;Interesting;persistent;true] A new move, with a very direct idea: to advance the h-pawn and deliver checkmate, sacrificing whatever is necessary along the way. 13. f1e1 Developing the rook and freeing the f1-square for an escape by the king, or a protective withdrawal of the knight. 13... g7g6 This is a difficult move and one that I don't really like, even though the computer considers it completely playable. It reinforces the bishop's position and can set up the Kf8-g7 maneuver, although Firouzja doesn't seem to have the desire to put the king on that side of the board. 14. d2f1 The knight returns to protect the king. 14... f6g4 Black's idea is to play f6 and then g5-h4, or even e5, depending on what happens. 15. d1d2  15... e8c8 Firouzja follows his heart and places the king on the opposite side to White's. That's why we like him so much. 16. b2b4 The game becomes a race: White advances on the queenside and Black advances on the kingside. However, as in all races, it's not enough to put your head down and start running: a more refined strategy will be necessary to defeat someone who also runs fast. 16... c8b8 The automatic move after castling long. 17. a2a4  17... f7f6 Preparing g5 and taking advantage of the fact that the white pawns on the queenside cannot win the game alone. 18. f3h4 [%c_effect h4;square;h4;type;GreatFind;persistent;true] This move is part of the \"refined strategy\" I mentioned earlier. The knight reduces the strength of the g5-advance and paralyzes Black's attack for now. 18... g6g5 [%c_effect g5;square;g5;type;Mistake;persistent;true] This is the biggest mistake of the game and, honestly, after it Carlsen takes control and doesn't give any chances. 19. h4f5  19... e6f5  20. e2d3 Black doesn't have the attack that was imagined and now needs to defend the weaknesses, in addition to the insecure king. 20... c6e7  21. f2f3  21... g4h6 