1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d6 9.h3 Nb8 The knight goes to d7 freeing the path for the c-pawn.
10.d4 Nbd7 With plenty of strategical ideas for both sides the Breyer Variation of the Ruy Lopez is a classical opening line, which Magnus Carlsen played many times before.
11.c4 Nakamura certainly relied on the surprise factor of this move. [In the vast majority of games White plays here 11.Nbd2 ]
11...c6 12.Nc3 "I was very happy when I saw this move, as now I can conveniently close the position", said Carlsen after the game. [12.a3 would have kept somewhat more tension in the position.]
12...b4 13.Na4 c5 14.d5 In this close position the main battlefield is going to be the kingside.
14...Re8!? A somewhat unexpected move in such positions. Usually in this structure Black is trying to prepare f7-f5 and therefore he needs the rook on f8 for that. However, Carlsen had another plan in mind - he wanted to transfer the knight to g6.
15.Bc2 Nf8 16.a3 a5 17.b3 The knight from a4 is coming to d3.
17...Ng6 18.Nb2 Bd7
19.Nh2 Now Nakamura improves the position of the other knight.
19...h6 And Carlsen is doing the same - the knight from f6 needs a square in order to prepare the favourable for Black exchange of the dark-squared bishops via g5.
20.Nf1 Nh7 21.Ne3 Bg5 22.axb4 axb4 23.Rxa8 Qxa8 24.Nf5 Bxc1 25.Qxc1
25...Bxf5 Continuing to exchanges pieces. Black wasn't obliged to hurry and could keep a comfortable position with 25...Qa6 - a move which Magnus, as he admitted, would have normally played, had he not been feeling tired.
26.exf5 Ngf8 Already around here Carlsen saw the possible repetition of moves and he just went for it without second thought.
27.Nd1 Nf6 28.f3 Qa2 29.g4 Ra8 30.Nf2 Qa3 White cannot really avoid the repetition. At this moment both sides must have been happy with the outcome.
31.Qb1 [31.Qd2 allows Black to improve with 31...Qb2 ; while the only reasonable attempt 31.h4 can bring White nothing but troubles in the arising endgame mentioned by Carlsen: 31...Qxc1 32.Rxc1 g5 33.fxg6 Nxg6 34.Bxg6 fxg6 35.g5 hxg5 36.hxg5 Nh5 37.Ne4 Ra6 and with his rook on the open file only Black can play for a win.]
31...Qa2 32.Qc1 Qa3 33.Qb1 Qa2 34.Qc1 1/2-1/2