1.e4
c5
2.Cf3
d6
3.d4
cxd4
4.Cxd4
Cf6
5.Cc3
g6
6.Ae3
Ag7
7.f3
Cc6
8.Dd2
0-0
9.Ac4
Ad7
10.0-0-0
Tc8
11.Ab3
Ce5
12.Rb1
a6
It's generally considered that pawn advance a6-b5 it's a little bit too slow for the Dragon, but Carlsen seems to have a different opinion about that. Even though he had already played 12..a6 three time this year, seems that Ivanchuk did not consider seriously that Carlsen were going to repeat it, thus in this positions he thought for more than forty minutes before moving.
13.The1!?N
Placing this rook in the centre, White wants to protect e4 pawn in order to be able to play f4-e5.
During the press conference, Ivanchuk said that he found this move during the game, but he recalled a Karpovīs game in a similar position were he also made this rook move.
At the same time, Carlsen was surprised by his opponent move, but this did not prevent him to respond quickly to it.
13...b5
14.Ah6
Axh6
15.Dxh6
Txc3!?
16.bxc3
a5!?
For second time, Carlsen did not use too much time to make a move that complicates the waters enormously. It's amazing how fast does he play in positions were "mortals" would need hours.
17.f4
Ceg4
18.Dh4
a4
19.Axf7+
Txf7
20.e5
Cd5
21.e6
Cxc3+
22.Rc1
[Worth considering was: 22.Ra1!?
Axe6
23.Cxe6
Dc8
(is also possible 23...Da5!?
) 24.Td4
Cxa2
but remaining position is unclear, even for the computer.
]
22...Axe6
23.Cxe6
Da5
Position is looks chaotic but tends to draw as many variation leads to perpetual check.
24.Dxg4
Cxa2+
25.Rb2
Dc3+!
26.Rxa2
Dxc2+
27.Ra1
Dc3+
28.Rb1
Db3+
29.Ra1
Dc3+
1/2-1/2