1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 The Berlin versus So! Why not? 4. d2d3  4... f8c5  5. b5c6  5... d7c6  6. e1g1  6... d8e7  7. b1d2  7... c8g4  8. h2h3  8... g4h5  9. d2c4  9... f6d7  10. a2a3 The world champion is  closely watching the efforts of his competitors and comes up with an  improvement upon a very fresh game. 10... a7a6 A novelty. Carlsen  secures the a7-g1 diagonal for his bishop. 11. b2b4  11... c5a7  12. c1e3 The black bishop is too strong to be left alive. On  top of that, White is depriving the opponent of his bishop pair. 12... a7e3  13. c4e3 The knight moves towards the optimal square. 13... f7f6  14. e3f5  14... e7f8 Carlsen wants to keep his second bishop on the  board. 15. f5g3  15... h5f7 Carlsen hopes to use the knights as tempo-gainers when  advancing his kingside passer. However, So is the one to open the game  after 16. d1d2  16... g7g6  17. f3h2  17... h7h5  18. f2f4  18... e5f4  19. d2f4  19... e8c8 It does not seem particularly scary for Black. After all,  he castled, his king is safe, he is ready to start his kingside assault.  However... 20. e4e5 ...throws a spanner in his plans. 20... f6f5 The  only move. 21. h2f3  21... f8e7  22. a1e1  22... d8e8 As now 23. h3h4 fixes all the valuable dark squares in White's favor. The  dangerous passer and the superb blockade promise White long-term  positional plus. 23... f7d5 An active, but vulnerable spot for the bishop. 24. f3g5  24... c6c5  25. e1e3 A pity! 25... b7b5 Carlsen seizes his chance and gets some air on the queenside. 26. g3e2  26... d5b7  27. e2c3 Missing a chance to achieve a completely dominant  position. 27... c5b4  28. a3b4  28... d7f6 The world champion spots an even better  route for his knight. 29. f1e1  29... f6g4  30. e3e2  30... c7c5 Obvious, but there is a  small detail... 31. e5e6  31... c5b4 And with very little time on the clock So demonstrates how  brilliant he is with... 32. g5f7  32... e7c7 The only defense. 33. f4c7  33... c8c7  34. f7h8  34... e8h8  35. c3d1 So won the exchange but nothing is  determined yet as the black bishop is strong and the queenside passers  might become rogue. 35... h8e8  36. e6e7 