(4) Cheparinov,Ivan (2572) - Kosteniuk,Alexandra (2490) [C42]
Grandmaster tournament, group B, cat 13 Wijk aan Zee (Holland) (4), 18.01.2005
[Kosteniuk Alexandra]

My opponent applied a very interesting novelty in this game. I reacted inccorectly but surprisingly enough after my mistake Cheparinov made a bad move and I got the advantage. At one moment I just had to choose between 2 continuations and to estimate what's better, unfortunately my choice was not correct. I got an equal ending instead of getting a much better one. After the game my opponent was so disappointed with this draw that even didn't want to analyze the game. I was on the same hand also disappointed with the wrong choice I made

1.e4 e5 2.Nf3 Nf6
Now the chess world encounters some problems with getting the advantage playing with White in the Petroff's defence. You can find numerous games in Wijk-aan -Zee in group A and B where White in vain tried to prove their opening advantage

3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.0-0 0-0 8.Re1 Bf5 9.c4 c6 10.c5 Bc7 11.Ng5!?
N

11...Bg6?!
Not the best reaction [better was 11...Re8 12.Bxe4 (12.f3 Nc3 13.Nxc3 Bxd3 (13...Rxe1+ 14.Qxe1 Bxd3 is also possible) 14.Qxd3 Rxe1+ 15.Kf2 Rxc1 16.Qxh7+ Kf8 17.Qh8+ Ke7 18.Qxg7 (18.Qxd8+ Kxd8 19.Rxc1 Bf4 20.Nxf7+ Ke7 21.Re1+ Kxf7 winning) 18...Qf8 19.Qxf8+ Kxf8 20.Rxc1 Bf4 21.Nh7+ Kg7 22.Re1 b6 (22...Kxh7 23.Re7 Kg6 24.Rxb7 with compensation) 23.Re7 bxc5 24.dxc5 Bh6 Black is better) 12...dxe4 (12...Bxe4 13.Nxe4 Rxe4 14.Rxe4 dxe4 15.Nc3 Nd7 the position is equal) 13.Nc3 h6 14.Ngxe4 Bxe4 15.Nxe4 Bxh2+= ; 11...h6 I didn't like this move because of White's reply 12.Qf3 (12.Nxe4 dxe4 13.Bc2 Bg6 14.Nc3 f5 ) 12...Bg6 13.Nxe4 dxe4 14.Bxe4 Re8 15.Bd2 Qxd4 16.Bxg6 Rxe1+ 17.Bxe1 fxg6 18.Qb3+ White is slightly better]

12.Bxe4 dxe4 13.Nc3 Re8 14.Qb3?
During the game I was afraid of [14.Ngxe4 because after my 11th move I realised that I'm not able to play 14...Bxe4 (14...Na6 15.Bg5 Qd7 16.Qb3 and comparing with the game White has a much better position) 15.Nxe4 Bxh2+? (15...Na6 with the idea of Bh2 16.f3 Nb4 with compensation) 16.Kxh2 Qh4+ 17.Kg1 Rxe4 because of 18.Bg5! winning]

14...b5! 15.Ngxe4 Na6 16.Bg5 Qxd4 17.Rad1
And here after 20 minutes thinking I played

17...Qb4?
[much better was 17...Nxc5! I saw this move during the game and wasn't able to decide which one of the 2 continuations that I have is better 18.Rxd4 Nxb3 19.axb3 f5 I thought that I can not play this move because of (19...Bb6 that was the main continuation I was thinking about during the game but here after 20.Rdd1 b4 21.Nd6 Rxe1+ 22.Rxe1 bxc3 23.bxc3 I don't get a lot but even this position is better than the position I got after Qb4) 20.Bf6 here. But it's only an illusion (20.Rd7 Be5 21.Ra1 fxe4 22.Rdxa7 Rxa7 23.Rxa7 b4 Black is playing with an extra-pawn and a pair of bishops what should be enough for a victory in the game) 20...fxe4 21.Rd7 Bxh2+ 22.Kxh2 gxf6=/+ and Black is much better]

18.Qxb4 Nxb4 19.a3 Bxe4
[19...Nc2 20.Re2 Be5 21.Rxc2 Bxc3 22.Rxc3 Bxe4= ]

20.Rxe4 Rxe4 21.Nxe4 Nd5 22.Nd6 f6 23.Bh4 Bxd6 24.cxd6 Rd8 25.Bg3 Nb6 26.f3 Kf7 27.Rc1 Nc4 28.b3 Nxd6 29.Rxc6 Nf5 30.Rc5
[30.Rc7+ Kg6 31.Rxa7 Rd1+ 32.Kf2 Rd2+ 33.Kg1 (33.Ke1 All my pieces are very well coordinated and it's dangerous for White try to play for something more than adraw 33...Rxg2 34.Bf2 Rxh2 35.a4 bxa4 36.bxa4 Rh1+ 37.Ke2 h5 Black's winning) 33...Rd1+ 34.Kf2 Rd2+ ]

30...Nxg3 31.hxg3 a6 32.Rc6 Rd3 33.Rxa6 Rxb3 34.a4 1/2-1/2