Sergash: Martin Osttveit from Norway has no FIDE title. Born in 1983, he was 18 or 19 years old when he played this game. In June 2016, he is rated 2066, though his peak was 2121 in October 2001.
I looked at the game with the assistance of the program Komodo 10 - 64 bits.
<1...c5> Carlsen coming back to that move. Last time he was in this position, he had played 1...Nf6 (see D Hersvik vs Carlsen, 2001 , a draw in 12 moves!). For the oldest game, see K Stokke vs Carlsen, 2001 another 12 move draw, as if Carlsen considered the English Opening as an almost automatic draw in 2001!).
<5...e6> The last time Carlsen had been facing this position, he had played 5...d6 (see the game just mentioned K Stokke vs Carlsen, 2001 ).
<10...d4N> This could be a theoritical novelty. 10...b6 11.Rb1 d4 12.Ne4 = / . Anatolij Sazonov (2220) vs. Valery Kedrov (2385), Moscow IM2 (Russia) 1996, 0-1.
<11.Na4?!N b6 > But the "true" novelty was this move, as Osttveit could have transposed in the game Sazonov vs. Kedrov mentioned above with 11.Ne4 b6 12.Rb1 Nd5 = / .
<13...Re8?!> Carlsen missed the posibility of obtaining a clear advantage, here: 13...Nxf4! 14.gxf4 Ne7! 15.Nxd4! cxd4 16.Bxa8 Bh3! 17.Be4! Nd5! (or also 17...Bxf1 18.Qxf1 Qd6 ).
<14.bxc5?! b5! > 14.Bd2! h6 (or 14...Rb8 15.Re1! Bb7 16.Qb3 ) 15.Re1 .