csmath: Giri plays into a4-antiMarshall which is what Aronian knows very well. Yet another example of Giri showing his preparation as with Kramnik and yet again he achieves nothing from the opening.
[Black has better move 15. ...Bf5, 16. Bc4 Rad8, 17. Nb3 Rxd1, 18. Rxd1 Nxa4!, 19. Nxf7 Nxb2, 20. Nh6 with repetition.
Aronian is making mistake justifying Giri's approach.]
18. Na6 Nf5
[18. ...Ng6 leaving f5 square for bishop seems to be alternative.]
[Black has a problem with inactive bishop but Aronian does not see that he has a pawn on b4 that is in danger as well.]
[Now white has clear advantage, for pawn on b4 is lost.]
[creating a weakness on b3. 27. Rac1! was better.]
[going for pawn on b3.]
[move by move Giri loses his advantage, there was no reason for this move as 29. h4 Re2?, 30. N3f4! creates possibility of taking Nxc7 due to knight fork on e6.]
Down a pawn Aronian does what he does the best - seeks countergame attacking white knights and b3 pawn.
[35. Nf4! looks risky but 35. ...Rd4, 36. f3 f5, 37. Ne2 and it is black that has to retreat. Unfortunately after the last imprecision white has no any advantage left and it would be prudent to think about draw here.]
[White will also lose a pawn now. Giri is now on downslide.It was better to play:
37. Nxh7+ Kg8, 38. Ng5 Nxb3, 39. Re1 Bxc4, 40. Kg1 and due a threat of mate on e8 white can reorganize and the draw is likely.]
[This move loses the game as black king and black pawn on a5 are faster and more dangerous than white counterpart.]
[51. Ne1 Kb3, 52. c5 Rf5 is also completely hopeless.]
52. Nf5 Rf6!? [buying time? 52. ...Rd7 and 53. ...Kb3 is decisive.]
Giri played prepared opening but there is really no advantage. Yet he got the upper hand when Aronian made errors in 15th and 19th move. I am almost certain that had Carlsen had the advantage Giri got after 19 moves Aronian would have been fried. Fortunately for him Giri kept on misplaying the position until his advantage was gone and then proceeded to lose the game. Endgame was rather typical when one king is faster than the other.
This ought to hurt.
It is worth noting that Giri loses to Aronian 6 to 0 with only 3 draws. He has very similar result with Kramnik.
Even though he is rather young guy this mishaps have to mean a little more than he would like to believe.