1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... d7d6  6. g2g4 [%c_effect g4;square;g4;type;Interesting;persistent;true] The g2-g4 advance is good even when Black doesn't yet have the knight on f6. Nowadays this is quite common, but in the 80s, when the game that served as inspiration for the choice of this opening was played, the benefits of this pawn move were still being discovered. 6... h7h6  7. h2h4  7... a7a6  8. f1g2  8... f8e7  9. c1e3  9... c6d4  10. d1d4  10... e6e5  11. d4d1  11... c8e6 The initial position for this round. An interesting Sicilian battle with equal chances. 12. c3d5 The most natural move, improving the knight. 12... a8c8 The best reaction. 13. c2c3 This position was reached in both games, as well as in Karpov vs. Kasparov. 13... g8f6 Kasparov's choice as well. 14. d5e7  14... e8e7 [%c_effect e7;square;e7;type;Interesting;persistent;true] A very creative and interesting novelty. The idea is that after a possible g5 hxg5 hxg5, Black is ready to occupy the h-file. 15. g4g5  15... f6g4 The most accurate choice. 16. e3c1 [%c_effect c1;square;c1;type;GreatFind;persistent;true] The best square for the bishop, protecting the pawn on b2. 16... h6g5  17. g2f3 [%c_effect f3;square;f3;type;Mistake;persistent;true] After this mistake, Nakamura never gets back in the game. 17... d8d7  18. h1g1  18... g4h2 [%c_effect h2;square;h2;type;GreatFind;persistent;true] A surprising square for the knight. 19. c1g5  19... f7f6  20. g5e3  20... c8g8 The attack on the h4-pawn doesn't give White time to withdraw the bishop. 21. h4h5  21... h2f3  22. d1f3 The position is a catastrophe for White. His development is worse, the h5-pawn can be attacked and the king is insecure. All of this becomes even more serious thanks to the presence of bishops of opposite colors on the board. 22... d7b5 One of many tempting moves. 23. e3c1 An ugly move, but it's hard to make recommendations. 23... e6f7 [%c_effect f7;square;f7;type;GreatFind;persistent;true] 24. g1h1  24... b5a4 A good and sophisticated move, improving the queen that keeps pressing the pawn on e4 and might even go to c2. There are several possible alternatives.