1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c5  5. c4d5  5... f6d5 The Semi-Tarrasch  Defense is a common guest now at top tournaments. Despite the obvious  danger of Black being checkmated on the kingside, the computer-backed  defenders often employ it, relying on the clarity of their computer  analysis. 6. e2e4  6... d5c3  7. b2c3  7... c5d4  8. c3d4  8... f8b4  9. c1d2  9... b4d2  10. d1d2  10... e8g8  11. f1c4  11... b8d7  12. e1g1  12... b7b6  13. a1d1  13... c8b7  14. f1e1  14... a8c8  15. c4b3  15... f8e8  16. e1e3  16... d7f6  17. d4d5 A novelty which should not surprise. Long time  ago, the Polugaevsky-Tal game gave White a clear knowledge of how to  attack on the kingside and enriched the chess treasury. 17... e6d5  18. e4e5 Exactly what Lev Polugaevsky did. The black bishop is blocked, and White opens a wonderful square for his pieces on d4. 18... f6e4  19. d2e1 Overprotects the pawn on e5 and prepares a further kingside  assault. 19... d8c7  20. f3d4 The key square in Carlsen's plan. 20... a7a6 A useful move that rules out the possible knight maneuver towards the  d6-square as well as the problems along the a4-e8 diagonal. The pawn could have also been used for a knight maneuver. 21. h2h4 A nice attacking resource. 21... c8d8 Giri reinforces the center but gives up the open c-file and  does not pay enough attention to the h-pawn. 22. f2f3 That the knight cannot now jump on c3 is great. 22... e4c5  23. h4h5  23... c5e6  24. d4f5  24... d5d4 Trying to keep White busy, even at the expense of a pawn. 25. e3d3  25... e6c5  26. d3d4  26... d8d4  27. d1d4  27... c5b3  28. e1g3 Well spotted by the world  champion. 28... g7g6  29. a2b3  29... e8d8 This allows a pretty finish. 30. e5e6  30... c7c1  31. g1h2  31... d8d4  32. e6e7 The point. It is over after 32... c1c8  33. g3e5  33... d4h4 