[%c_effect c8;square;c8;type;Inaccuracy;persistent;true] Too slow.
1. d2d4  1... g8f6  2. c2c4  2... c7c6  3. g1f3  3... d7d5  4. b1c3  4... e7e6  5. e2e3  5... g7g6 This move leads to a passive position of the Schlechter Defense with the pawn advancing to e6. Of course, advancing the pawns to e6 and g6, especially at the beginning of the game, is not so logical. Both moves have the same main objective: to free the bishop's path. The great merit of this move, and to be honest perhaps the only one, is taking Caruana out of his usual high-level preparation. It must be admitted that Rapport's strategy will have some success. 6. f1d3  6... f8g7  7. e1g1  7... e8g8  8. e3e4 It's also possible to play a slower, more maneuvering game with 8.b3. It's hard to say which is better. 8... d5e4  9. d3e4 At first glance, this move seems very clever, provoking the exchange of the knight for the bishop in a favorable situation for White. Rapport's next excellent move, however, shows the shortcomings of the bishop capture. 9... b7b5 [%c_effect b5;square;b5;type;GreatFind;persistent;true] A creative resource and the best move. 10. e4d3  10... b5c4  11. d3c4  11... c8a6 [%c_effect a6;square;a6;type;GreatFind;persistent;true] The exchange of bishops is desirable for Black. 12. c4a6  12... b8a6  13. d1a4 My impression is that this is not the most precise move, since the queen is not doing much on a4, a square better suited for the knight. 13... d8b6  14. c1f4  14... f8d8  15. f4e5  15... a6b4  16. f1d1  16... b4d5  17. a4c2 The position is a little trickier now. White is preparing Na4, preventing c6-c5, and leaving Black with a passive position. 17... g7f8  18. f3g5 A somewhat surprising move. The knight is going to e4, but it looks a bit superficial. 18... f6g4  19. e5g3  19... f8g7 Here and on the next moves, Black must seriously consider the subtle 19...Nh6 with the intention of going with the knight to f5. 20. g5f3 