[%c_effect d3;square;d3;type;GreatFind;persistent;true] Now Carlsen has just one way to escape.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3 The choice of the Catalan Opening shows how seriously Carlsen was taking this match. That was his main opening in the world championship duel against Nepomniachtchi. 4... f8e7  5. f1g2  5... e8g8  6. e1g1  6... d5c4  7. d1c2  7... a7a6  8. a2a4  8... c8d7  9. c2c4  9... d7c6  10. c1g5 This is one of the most important positions in the Catalan. 10... a6a5 A rare move in Nakamura's games. The two most popular alternatives, 10...Bd5 and 10...Nbd7, had already been tried by him. 11. b1c3  11... b8d7  12. f1d1  12... h7h6  13. g5f6  13... d7f6  14. f3e5  14... c6g2  15. g1g2  15... c7c6  16. e2e4  16... e7b4  17. c4e2  17... d8b6 The first new move. 18. a1c1  18... a8d8  19. e5f3  19... d8d7  20. e2c2  20... b4c3 [%c_effect c3;square;c3;type;Interesting;persistent;true] This is a very difficult move for me and I guess for most players. Doubling rooks on the d-file or playing a waiting move seems easier. Instead, Nakamura first parts with the bishop and then undermines White's center. It's usually very difficult to evaluate changes in the positional elements during the middlegame. Supposing this was not home preparation, it shows a deep chess understanding. 21. b2c3  21... c6c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] 22. c1b1  22... b6c7  23. c2e2  23... f8d8  24. b1b5  24... c5d4  25. c3d4  25... b7b6 [%c_effect b6;square;b6;type;GreatFind;persistent;true] Black is in time to get counterplay by attacking White's e4-pawn. 26. d1b1  26... c7b7  27. d4d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] 27... e6d5  28. b5b6  28... b7a8 [%c_effect a8;square;a8;type;Inaccuracy;persistent;true] This is inaccurate due to a tactical idea that is simply impossible to stop during a blitz game. 29. e4e5  29... f6e4  30. b6a6 [%c_effect a6;square;a6;type;Inaccuracy;persistent;true] 30... a8c8  31. b1b6  31... e4c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] A pawn sacrifice and a very good practical decision. 32. a6a5  32... d5d4 The pawn starts rolling and the position looks scary for White. 33. e2c4  33... d7c7  34. c4b4 