1. e2e4 Because I normally like to start Chess960 games with harmonic moves that open the way for a bishop or queen, my favorites in this position are 1.e4 (played in two games) and 1.b4 (which was not played, but which can transpose later if White plays e4). Two games in this round started with 1.c4. 1... e7e5 An important point for Chess960 opening theoreticians (I don't know how many there are, if any) is knowing under what circumstances repeating the same moves as your opponent is a good strategy. 2. b2b4 A harmonious move, as it opens the way for the bishop and the rook supports the pawn. 2... b7b5  3. g1h3 [%c_effect h3;square;h3;type;GreatFind;persistent;true] As we have seen in previous analyses, this is the best home for the knight. 3... c8e7 Carlsen wants to bring the knight to g6 or c6. 4. f2f4 [%c_effect f4;square;f4;type;GreatFind;persistent;true] 4... e5f4  5. f1h1 Black's king is in an awkward situation, face to face with the white rook. Black needs to quickly prepare castling. 5... e7g6  6. d2d3 Protecting the e4-pawn. 6... d8f6  7. a1f6 It's hard to say if this is better than the immediate capture on f4. 7... g8f6  8. h3f4  8... e8e5  9. e1g3  9... b8e8 [%c_effect e8;square;e8;type;Inaccuracy;persistent;true] Black's rook will be far from the weaknesses of the queenside, and this will be exemplarily exploited by Firouzja. There are two better alternatives, and the game is close to equality in both cases. 10. f4g6  10... h7g6  11. g3e5  11... e8e5  12. b1b3 [%c_effect b3;square;b3;type;GreatFind;persistent;true] A magnificent move. The white rook causes Black a lot of discomfort. First, it will attack the a-pawn and then the c-pawn. 12... a7a6  13. b3a3  13... a8b7  14. a3c3 [%c_effect c3;square;c3;type;GreatFind;persistent;true] Now Black must choose between defending the pawn with a passive knight move or worsening the structure after c7-c6. 14... f6e8  15. c1b3  15... f8h8 This loses a pawn. 16. b3c5  16... b7c8  17. c3a3 [%c_effect a3;square;a3;type;GreatFind;persistent;true] The a6-pawn cannot be protected. Carlsen tries to create counterplay. The next few moves by both sides are very logical. 17... e8f6  18. c5a6  18... c8a6  19. a3a6  19... d7d5  20. e4d5  20... f6d5  21. a2a3 Defending the b4-pawn. 21... d5e3  22. f1e1  22... f8e8  23. a6c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] The rook continues to work hard. 23... e3d1 Rook endgames always offer some hope. If White manages to get the bishop to f3, then Black's position becomes even more difficult. 24. e1d1  24... e8e7  25. d1d2 [%c_effect d2;square;d2;type;GreatFind;persistent;true] Protecting the second rank. Firouzja's play in the whole game creates an excellent impression. 25... g6g5  26. h2h3  26... e5f5 Carlsen wants to activate the rooks with Re1, Rf1 and maybe create mating threats after this with f5-f4. 27. d3d4 Opening the third rank for a rook to join the defense. 27... e7e1  28. g1h2  28... f5f1  29. c6c3 [%c_effect c3;square;c3;type;GreatFind;persistent;true] The third rank must be protected. The reason for this becomes clear in the variation after 29.Rxc7. 29... f7f5  30. h2g3 [%c_effect g3;square;g3;type;GreatFind;persistent;true] The only winning move. The king escapes before the room is locked. 30... g8h7  31. d2f2 [%c_effect f2;square;f2;type;GreatFind;persistent;true] 31... f5f4 