1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... a7a6 The most popular move is 5...Qc7, but my favorite has always been 5...a6. I've played this position so many times with Black that I've lost count. 6. c1f4 White has many different attempts here. This move is only the eighth most popular. 6... d7d6  7. f4g3  7... f8e7  8. f1e2  8... c8d7 This move defends the c6-knight and prepares the development of the kingside. 9. d4b3  9... e6e5 A new move and the first of a series of extremely difficult moves that Caruana will play in this game. If I had a thousand lives, in none of them would I have ever played this move, as my prejudice against weakening the d5-square is far too great. Naturally, Caruana has a superior understanding of chess and knows quite well the risks of this move. 10. e2g4 Probably surprised by Black's daring strategy, Moradiabadi immediately makes a mistake. 10... d7g4  11. d1g4  11... h7h5 Advancing the pawns in front of the king is always difficult, although here, this move is quite tempting, as the white bishop is uncomfortable on g3. 12. g4h3  12... h5h4  13. f2f3 Taking advantage of the pin to save the bishop. 13... e7g5  14. e1g1  14... h8h6 With his last two fantastic moves, Caruana uniquely activates both the bishop and the rook, even at the cost of giving up his castling rights. We see Caruana breaking a number of classical concepts in this game, which makes it particularly interesting. 15. g3f2  15... g8f6 Perhaps the most important aspect of the position is the poor placement of the queen on h3, a consequence of White's 10th move. 16. a1d1  16... d8c7  17. b3c1  17... e8f8  18. a2a3  18... c6a5 Another clinical move. It's true that my computer suggests 18...Nd8 here, heading for e6, but we'd better leave that kind of move to the machines. 19. c1d3  19... a5c4  20. d3b4 Moradiabadi enters desperation mode, but that was not necessary. 20. Rfe1 was possible, but to play that, you need to see a fantastic machine-like resource. 20... c7c8 Another good and difficult move. I would never have resisted taking on b2 right away. 21. h3c8  21... a8c8  22. c3a4  22... a6a5 One more accurate move, taking away the protection of c2. 23. b4a2  23... c4e3 Now Black wins material. 24. a2c3  24... e3d1  25. f1d1 