1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. c2c3  4... g8f6  5. d2d4 A good, old classical line that So analyzed extensively for an online course. 5... e5d4  6. e4e5  6... d7d5  7. c4b5  7... f6e4  8. c3d4  8... c5b6  9. b1c3  9... e8g8  10. c1e3  10... c8g4 The pawn structure now is  very much like the one in the Yates line of the Ruy Lopez. White has a  strong center, but Black's free piece play allows him a chance to  eventually attack and destroy the center. 11. h2h3  11... g4h5  12. d1c2  12... h5g6  13. c2b3 The attack against the d5-point helps So relieve the pressure  against his d4-pawn. 13... c6e7  14. e1g1  14... c7c6  15. b5d3 The bishop  belongs to this diagonal. 15... e7f5  16. b3c2 There it is, the pressure  along the b1-h7 diagonal. It forces Carlsen to swap a few pieces. 16... e4c3  17. b2c3  17... f5e3  18. f2e3  18... g6d3  19. c2d3 The center survives and is ready to  get in motion. Therefore: 19... f7f6 is forced, but then 20. c3c4  20... b6c7  And the world champion errs! 21. c4d5  21... d8d5  22. e5f6  22... g7f6 As ugly as this move is, it was played. Carlsen admitted in the after-match interview that he had miscalculated earlier and thought  that this was the only way he could get some play. 23. e3e4  23... d5d7  24. a1d1 Believe it or not, but So had this position in his online course! Apparently Carlsen had not checked it, as he probably  believed that the course is designed only for a lower-rated audience. A  wonderful example of a scrupulous, earnest work prepared for any player  that can be used by yourself, as an example! 24... a8d8  25. f3h4 With  the knight coming to f5, White is strategically winning. 25... g8h8  26. h4f5  26... c6c5 The only chance to get some counterplay, but White keeps  everything stable. 27. d4d5  27... c7e5  28. d1b1  28... b7b6 