1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. h2h3 It is extremely hard to guess what will Caruana choose against the Najdorf, but this modest-looking move seems to suit his style well. 6... e7e6  7. g2g4  7... h7h6  8. a2a3 A crafty little move, which still needs to prove later that it is useful. But since Black's main idea is to attack the center and the queenside with a b7-b5-b4 thrust, it certainly makes sense. 8... f8e7  9. c1e3  9... b8c6  10. h1g1  10... f6d7 A typical maneuver and a novelty. 11. f1e2  11... g7g5 \"Probably not really good for Black.\" (Caruana) 12. d1d2  12... c6e5  13. e1c1  13... b7b5  14. h3h4 This is the reason why Caruana did not trust the g7-g5 push. White will be the one to capitalize on the opening of the h-file. 14... c8b7  15. h4g5  15... h6g5  16. g1h1  16... h8g8 Chigaev knows that this rook is a most important defender. 17. h1h5 Very logical and straightforward play by White. 17... a8c8  18. d1h1  18... e7f6 The exchange sacrifice is in the air, and White prevents it with... 19. f2f3 ...to which Chigaev keeps maneuvering 19... d8e7  20. c1b1 A useful move. 20... e5c4  21. e2c4  21... c8c4 \"When I played\" 22. b2b3 \"I pretty much decided on the sacrifice.\" (Caruana) 22... c4c8  23. c3d5 Caruana called it an extremely risky sacrifice. \"It's not even like I have a very direct attack. I have some initiative, which could last you know, for a move.\" 23... e6d5  24. d4f5  24... e7e6  25. e3g5 For the piece, White got open files and diagonals. And a 100-million-Pegasus. 25... f6c3 A good move! It was, however, played after quite a significant amount of time spent on the clock. Chigaev was likely trying to put himself together. 26. d2h2 Aiming at the other significant black weakness. 26... d7e5 The best defense again. 27. h5h6  27... g8g6 This time Chigaev errs, and this is all that it takes for a side to lose instantly in this super-sharp position. 28. h6g6 \"I think he missed this.\" (Caruana) White trades a key defender and then quickly infiltrates into the enemy camp. 28... e6g6  29. h2f4 All the white pieces gain coordination, and Caruana converts in style. 29... e5f3  30. f4f3  30... d5e4  31. f3e3 The decisive infiltration. 31... c3g7  32. e3a7  32... g6g5  33. a7b7 