1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... f8c5  5. e1g1  5... d7d6  6. c2c3  6... e8g8  7. h2h3  7... a7a6  8. a2a4  8... c5a7  9. f1e1  9... h7h6  10. b1d2  10... f8e8  11. b2b4  11... c8e6  12. c4e6  12... e8e6 This is a critical position of the modern Italian Opening theory. 13. c1b2 This move is suggested by Giri in one of his opening courses. 13... f6h5  14. d2f1  14... c6e7  15. c3c4  15... e7g6  16. g2g3 [%c_effect g3;square;g3;type;Inaccuracy;persistent;true] A new move. Caruana probably got his preparation mixed up, which is very rare. 16... g6f4 [%c_effect f4;square;f4;type;Interesting;persistent;true] The idea of the knight sacrifice on f4 is thematic. It's also possible to place the other knight on this square. 17. g3f4  17... e6g6  18. g1h2  18... h5f4 