Tiviakov, Sergei - De Firmian, Nick E 2008.??.??

Gjovik 105/27

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 c6 6.O-O Bg7 7.exd6 Qxd6 8.h3 O-O 9.Nbd2 Nd7 10.Bb3 N7f6 (10... Qc7 - 15/143)

11.Nc4 Qc7 (11... Qd8 12.Nce5 a5 13.c3 Bf5 14.Re1 White has a moderate advantage)

12.Nce5 Bf5 (12... b5!?)

13.c4 Nb6 14.Bf4 Qd8 15.Qe2 (15.Re1!?)

15... Nfd7 16.Rad1 Nxe5 17.Nxe5! (17.dxe5 Qc8 White has a slight advantage)

17... a5!? (17... Nd7 18.g4!? (18.Nf3 White has a moderate advantage) 18... Nxe5 (18... Be6 19.d5 Nxe5 20.dxe6 Qa5 21.Rfe1 White has a moderate advantage) 19.dxe5 Bd7 20.e6 fxe6 21.c5 Rxf4 22.Rxd7 White has a moderate advantage)

18.g4! (18.a3 Nd7! 19.g4 Nxe5 20.dxe5 Qb6 White has a slight advantage)

18... Bc8 (18... a4 19.gxf5 axb3 20.axb3 gxf5 21.Kh2 White has a moderate advantage ->>>) (18... Be6 19.a4 White has a moderate advantage)

19.Rfe1 (19.a3!?) (19.a4)

19... a4 20.Bc2 ()

20... e6 (20... Be6!?)

21.Bg3 Nd7 22.h4 Qb6 (22... Nxe5 23.dxe5 White has a moderate advantage)

23.Bb1 Nf6 (23... Nxe5 24.dxe5 White has a moderate advantage)

24.h5 c5 25.dxc5 Qxc5 26.Qf3 (->>>)

26... Ra6 (26... Ra5 27.Bh4 Ne8 28.Nd7 Bxd7 29.Rxd7 White has a moderate advantage)

27.Bh4 Ne8 28.Nd7 Bxd7 29.Rxd7 Qxc4 (29... g5 30.Bg3 Bxb2 31.Qd3 (31.Rxb7 White has a moderate advantage) 31... Nf6 32.Rxb7 White has a moderate advantage)

30.Be7 Qc6 (30... Nf6 31.Rxb7 Qxg4+ 32.Qxg4 Nxg4 33.Bxf8 White has a decisive advantage)

31.Qxc6 bxc6 32.g5! Bxb2 33.Re3 Ng7 (33... Ra5 34.Rf3 (34.Be4!? Bc1 35.Rg3 Ng7 36.Bxf8 Kxf8 White has a moderate advantage) 34... f6 (34... Rd5 35.Rb7 Rd1+ 36.Kg2 Rxb1 37.Bxf8 White has a decisive advantage) 35.hxg6 Rxg5+ 36.Rg3 Rxg3+ 37.fxg3 hxg6 38.Bxg6 Ng7 39.Bxf8 Kxf8 40.Rf7+ Kg8 41.Rc7 Kf8 42.Rxc6 f5 43.Rc7 White has a decisive advantage)

34.Bxf8 Kxf8 35.h6 White has a decisive advantage Nf5 36.Bxf5 gxf5 37.Red3 Ra8 (37... e5 38.R3d6)

38.Rb7 Bc1 39.Rdd7 Bxg5 1-0