1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... f8e7  5. f1g2 The preparation for the world championship match keeps giving fruits for the world champion, and in this game he manages to demonstrate one more powerful Catalan idea. 5... e8g8  6. e1g1  6... d5c4  7. b1a3  7... e7a3  8. b2a3  8... c8d7  9. a3a4 An interesting side-line according to Megabase. White quickly brings his bishop out, but in the process risks to lose his gambited pawn permanently. 9... d7c6  10. c1a3  10... f8e8  11. d1c2 [#] 11... b8d7 Technically speaking, it is Giri that produces the novelty. However, an important detail: he does this after more than twelve minutes on the clock. 12. a1c1 Carlsen eyeballs the c7-pawn. If White can win his pawn back, his advantage will be enormous. The pressure along the b- and c-files a la Benko, coupled with the nasty bishops and the nastier a-pawns would be too much for Black to cope with. 12... a7a6  13. c2c4  13... d7b6  14. c4c3 Played after a lenghty thought. 14... b6a4  15. c3b3  15... d8d5 For now, the world champion does play 16. c1c6 anyway, and even though the black pawns are still intact after 16... d5c6  17. f3e5  17... c6b5  18. b3c2 Black has serious problems to solve. His queen is exposed, the knight on the rim is in mortal danger, and all the queenside pawns are hanging. 18... f6d5 The most natural move turns out to be a serious mistake. 19. f1b1  19... b5a5  20. g2d5 Perhaps Giri underestimated this idea. 20... e6d5  21. b1b7 A very precise move! Ba3-b4 is a mortal threat and that forces Black to weaken his seventh rank. 21... c7c5  22. c2f5  22... e8f8  23. e5f7  23... a5d8 A passive defense, but there was nothing else. 24. d4c5 Wins an inportant pawn, but above all, opens the long diagonal for the bishop. 24... d8f6 