1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Bd7 12. Rb1 Qc7 13. Bd3 Rfd8 14. Qd2 a6 15. f4 e6 16. dxc5 Na5 17. Nd4 e5
A typical Gruenfeld scenario. The situation is dynamically balanced
18. fxe5 Qxe5 19. Qb2 Rac8 20. Qb4
Better was Qf2 in the last move or at least here. White wants to win material but this is buyed with loss of activity
20... Qxc5 21. Qxc5 Rxc5 22. Ne2 Rc6 23. Bb6 Rxb6 24. Rxb6 Bc6
White has material advantage. Black has the better pawn structure and the activity
25. Rf3 f5 26. Rb4
White gives back the material, to suppress blacks activity. But black still is more dynamic
26... Bf8 27. Rd4 Bc5 28. Re3 far better for white Rf4 with forced pawn and bishop trade and the game is still balanced
28... Re8 29. e5 Bd5 30. Kf2
Rxd5 is less worse for white
30... Bxa2
now white is lost
31. Ra4 Bxe3+ 32. Kxe3 Rxe5+ 33. Kf4 Bb3 34. Kxe5 Bxa4
black is 2 pawn in advance and can enjoy the rest of the game
35. Kd6 Bc6 36. g3 Kg7 37. Nd4 Be4 38. Bxe4 fxe4 39. Nc2 Nc4+ 40. Kd5 Nd2 41. Kc5 Kf6 42. Kb6 Ke5 43. Kxb7 Kd5 44. Ne3+ Kc5 45. Kxa6 Nb1 46. Kb7 Nxc3 47. Kc8 Kd4 48. Ng2 Kd3

Round 3 Ivanchuk vs Aronian
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6
Black plays the Berlin defend
4. O-O Nxe4 the main line ( 4... a6 is bad see our vote game 5. Bxc6 dxc6 6. Nxe5 )
5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8
now black can not castle but that is no problem because the white queen is gone
9. Nc3 Ke8 10. h3 h5 11. Bf4 Bd7 12. Rad1 Rd8
white is a little bit better but nothing serious for black
13. b3 Be7 14. Rfe1
better was Ne4 -> Ng5 to hold the pressure
14... Bb4 15. Bd2 Bc8 16. Ne2 Bxd2 17. Nxd2 Ne7 18. Nc4
better for white would be to put the night to e4 and play c2-c4
white would have comfortable position
but white still has a good play
18... Nd5 19. a3 Ke7 20. f3 h4
Black has basically gotten everything he wants out of a Berlin. He runs no risk of e6, the king side majority is not going anywhere, and he has made no weaknesses and his rooks are active. However he has only equalized, Ivanchuk tries to push forward but it backfires.
21. Kf2 Rh5 22. Rd2 Re8
( 22... b5 is bad for black because of 23. Na5 Bd7 24. Nd4 )
23. Nd4 Kf8 24. a4 a6 25. a5 Nb4 26. Ne2
white rearranges the pieces for the attack
black can do nothing but some waiting moves
but whites problem is, black has no weak points, nothing to attack
26... Nd5 27. Nd4 Ne7 28. Re4 Rh6 29. f4
white wants to attack but weakens his position
better was Ne2 and doubleing the rocks on d-col
29... Nd5 30. Kf3 Rg6 31. f5 Rh6 32. Re1 c5 33. Ne2 Ne7
now black can attack the white weak pawns on e5-f5
34. Nf4
white can not protect the pawn ( 34. f6 gxf6 35. Nf4 Nc6 )
34... Nxf5 35. c3
white lost the pawn but did not gain any compensation
35... Ne7 36. Red1 Ng6 37. Nd3 Be6 38. Re1 Rh5 39. Kf2
( 39. Nxc5 Bxc4 40. Nd7+ Kg8 41. bxc4 Nxe5+ 42. Rxe5 Rhxe5 43. Nxe5 Rxe5 44. Rd8+ Kh7 45. Rd7 Rc5 black wins the pawn )
39... Rf5+ 40. Kg1 Bxc4 41. bxc4 Nxe5 42. Rde2
for Nx see annotation for move 39
42... f6 43. Re4
white is already lost now enjoy the rest 43... b6 44. axb6 cxb6 45. Rxh4 Ng6
A few moves have passed and Black has a better pawn structure, a passed a-pawn and he still has an extra pawn.
46. Rhe4 Rxe4 47. Rxe4 Kf7 48. Re2 Ne5 49. g4 Rf3 50. Nxe5+ fxe5 51. Kg2 Rxc3 52. Rf2+ Kg6 53. Rb2 a5 54. Rxb6+ Kg5 55. Rb5 a4 56. Rxc5 Kf4 57. Ra5 a3
And Ivanchuk resigned as he cannot stop all the
pawns. Aronian baited his opponent like a good Berlin player does, and Ivanchuk didn't know he should have bailed into achieving a draw until it was too late.