1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4 The evergreen Italian. 3... f8c5  4. e1g1  4... g8f6  5. d2d3  5... d7d6  6. c2c3  6... h7h6  7. f1e1  7... e8g8  8. b1d2  8... a7a5  9. d2f1  9... c8e6  10. c4b5 All of this is very popular nowadays and the players  actually had an earlier discussion in the line. 10... c6e7  11. d3d4  11... e5d4  12. c3d4  12... c5b6  13. f1g3  13... d6d5  14. e4e5  14... f6e4 Now the game resembles the Ruy Lopez.  Carlsen deviates from their earlier game with... 15. b5d3 ...which is the right diagonal for his bishop. 15... e4g3  16. h2g3  16... a5a4 Now the bishop retreats with tempo. 17. d3c2  17... a4a3  18. b2a3 Carlsen took some time on this move and then chopped the pawn  off. 18... e6g4  19. a3a4 An excellent idea. First White brings the dark-squared bishop  in the game. 19... d8d7 