Preparing Re1, fighting for the open file.
1. g1f3  1... d7d5  2. d2d4  2... e7e6  3. c2c4  3... c7c5  4. c4d5  4... e6d5  5. g2g3  5... b8c6  6. f1g2  6... g8f6  7. e1g1  7... f8e7 It's nice to see the Tarrasch Defense, an old Kasparov favorite, back in chess fashion. 8. d4c5  8... e7c5  9. a2a3  9... e8g8  10. b2b4  10... c5b6  11. c1b2  11... c8g4  12. b1c3  12... f8e8  13. c3a4 Something went wrong for Nakamura in the opening. This position has been played by some strong GMs, but the computer already indicates a clear preference for White. 13... b6c7  14. a4c5  14... a8b8  15. a1c1  15... c6e5  16. b2e5 A new move. 16... c7e5  17. h2h3  17... g4f3 Nakamura said he thought he should be completely fine here. 18. e2f3 A thematic move to play f4 next. 18... a7a5  19. d1b3  19... a5b4  20. a3b4  20... g7g5 What a difficult move to play. Nakamura was critical about it, but it's one of the top choices of my computer! The idea is to avoid f3-f4, but at the cost of weakening the f5-square and the kingside in general. 21. f1d1  21... e5d6  22. b3d3  22... d8e7 