1. e2e4  1... e7e5  2. g1f3  2... g8f6 Caruana switches to the Petroff after the painful loss that he suffered in Norway earlier this year. 3. b1c3 Nakamura prefers to stay clear of the main lines. Just like in Norway, he has prepared something nasty for his opponent, but this time in the Four Knights. 3... b8c6  4. d2d4  4... e5d4  5. f3d4  5... f8b4  6. d4c6  6... b7c6  7. f1d3  7... d7d5  8. e4d5  8... e8g8 Considered to be the most accurate move-order nowadays. 9. e1g1  9... c6d5  10. h2h3  10... c8e6  11. d1f3  11... c7c5 Logical and obvious play. So far both players are playing fast and confidently. 12. f1d1 But now Caruana needs to take some time on the clock. How to lower the central tension $2 12... b4c3 With trades, Black decided. 13. b2c3  13... d8a5 This is Caruana's idea, avoiding the pin. 14. c1g5 Nevertheless. 14... f6e4  15. d3e4  15... d5e4  16. f3g3 [%c_effect g3;square;g3;type;GreatFind;persistent;true] All of this has been seen, and Nakamura clearly knew what he was doing. White's pawn structure doesn't look great, but the comparison of the bishops is clearly in his favor. And whoever has the better opposite-colored bishop in the middlegame has the long-term, static advantage. 16... g8h8 Played after serious thought. 17. a2a4 [%c_effect a4;square;a4;type;GreatFind;persistent;true] Practically blitzed out. The novelty only emphasizes White's long-term advantage. Thanks to his superior bishop he has full control over the dark squares and need not rush. Now start your computers. They will tell you that White's advantage is insignificant. What they will not tell you is how to defend. Or rather how to defend in a concrete way. Nakamura's opening choice was yet another huge success story after Norway. He got a one-sided position with no counterplay for Caruana, with clear ideas of how to attack and improve. 17... f8e8 Black is again trying to avoid any committal moves. 18. d1d6 White keeps improving, but what can Black do $2 18... h7h6 Expelling the bishop, but on a dark square the pawn is now a target. 19. g5f4  19... e8e7  20. g3e3 [%c_effect e3;square;e3;type;GreatFind;persistent;true] The first lengthy thought by Nakamura leads to a great move, with a great idea. 20... a8c8 Covering the c6-spot. 21. f4h6 [%c_effect h6;square;h6;type;GreatFind;persistent;true] The point behind Nakamura's previous move. He starts a huge kingside attack. 21... f7f6 [%c_effect f6;square;f6;type;GreatFind;persistent;true] Caruana is as resilient as ever. 22. e3e4  22... a5c3  23. a1d1 [%c_effect d1;square;d1;type;GreatFind;persistent;true] After prolonged thought, Nakamura finds a way to break in. 23... c8e8 Black is trying to defend every single square. 24. d6d8 But the white pieces keep entering. 24... e6g8  25. e4h4 This provides Black an additional chance. 25... c3c2 The queen hurries to the king's rescue. 26. d1d3 [%c_effect d3;square;d3;type;GreatFind;persistent;true] But the audience with the king is not granted. 26... g8h7  27. d3d7 [%c_effect d7;square;d7;type;GreatFind;persistent;true] No rush $1 The attack can be finished off at a better moment. 27... g7g5  28. h4g3  28... c2b1 The check only makes things worse. 29. g1h2  29... b1f5 The queens are traded, but this is too little, too late. 30. d7e7  30... e8d8  31. g3c7  31... f5f4  32. c7f4  32... g5f4  33. h6g7  33... h8g8  34. g7f6 Nakamura won material and converts quickly. 34... h7b1  35. e7g7  35... g8f8  36. f6d8 