1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 6.Nb3 Be7 7.Qg4 g6 8.Qe2 d6 9.0-0 Nc6 10.c4 Ne5 11.h3 The first new move, normal being Nc3, however one wonders what it achieves that outweighs simple development.
11...Nf6 12.Bh6 Nh5 13.N1d2?! Missing Black's strong and highly original idea. [In order to prevent Svidler's concept, Kurnusov had to play 13.f4! Ng3 14.Qf2 Nxd3 (14...Nxf1? 15.fxe5 ) 15.Qxg3 Nc5 16.N1d2 and White is better.]
14...g5! 15.e5 dxe5 16.Qf3 Nf4! The point is clear. Not only has Black secured a fine outpost for the knight, but he is even threatening the h6 bishop with a rather unpleasant Rg8-g6.
17.Bg7 Rg8 18.Bxe5 Qd3 19.c5?! [Better was 19.Qe4 f6 20.Bxf4 Qxe4 21.Nxe4 gxf4 22.Rad1 e5 with a slight edge for Black, but nothing tragic.]
19...Qxf3 20.Nxf3 f6 21.Bd6 White underestimates the strength of the knight, and should have exchanged it while he had a chance.
22...g4! The protected bishop on d6 may look big and strong, but it is really biting on dust.
23.h4 Be6 24.g3 Nd3 25.Rab1 a5 26.Ne4 Nb4 27.Rfe1 a4 28.Nc1 Kf7 29.a3 Nc2 30.Rd1 Bf5 31.Bxe7? Bxe4! 32.Bd6 Nxa3 33.Ra1 Nc2 34.Ra2 Ke6 35.Rd2 Nd4 36.Kf1 Nf3 37.Re2 Bd5 38.Ra3 Bc4 39.Nd3 Nd4 40.Rc3 [40.Re1 Nb5 ; 40.Rd2 e4 ]
40...Bxd3 41.Rxd3 Nxe2 0-1