Vlassow Valentin (RUS) (2365) - Dvoirys Semen (RUS) (2530) [B51]

Chess Siberia

Vlassow Valentin (RUS) (2365) - Dvoirys Semen (RUS) (2530) [B51]
Chigorin Memorial, St. Petersburg (2) 2001
Notes by Boris Schipkov

1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. c3 a6 6. Bxc6 Bxc6 7. Re1 Nf6 8. d4 Bxe4 9. Bg5

9...d5
Alternatives are 9...Bd5 and 9...Bc6.
9...Bd5 10. Nbd2 b5 11. c4 bxc4 12. dxc5 e6 13. Rc1 dxc5 14. Ne5 Qb8 15. Ndxc4 Be7 16. Bxf6 gxf6 17. Nd3 O-O 18. Ne3 Rd8 19. Qg4+ Kh8 20. Qh5 c4 21. Qxf7 Ra7 22. Nxd5 cxd3 23. Nxe7 Rf8 24. Qxf8+ Qxf8 25. Rc8 Qxc8 26. Nxc8 Rc7 27. Rd1 Rxc8 28. f4 Kg7 29. Rxd3 Rc1+ 30. Kf2 Rc2+ 31. Kf3 Rxb2 32. Ra3 Rb6 33. Ra5 Kg6 1/2-1/2, draw in Brochet, P - Timoshenko, G, ch-Paris Open 2001.
9...Bc6 10. Bxf6 gxf6 11. d5 Bd7 12. Nbd2 e5 13. dxe6 Bxe6 14. Nh4 Be7 15. Qh5 Qd7 16. Nc4 Bxc4 17. Nf5 O-O-O 18. Rxe7 Qb5 1/2-1/2, draw in De la Riva Aguado, O - Rechlis, G, TCh-FRA, Montpellier 2001.
10. c4!?
An interesting continuation. If 10. Nbd2 then 10...Bxf3 11. Qxf3 cxd4 12. Bxf6 gxf6 13. c4 dxc4 14. Nxc4 e6 15. Qxb7 Rb8 16. Qxa6 Qd5 17. Qa4+ Qb5 18. Qxb5+ Rxb5 19. Rad1 Rd5 20. Kf1 Rg8 21. Re4 Bc5 22. b4 Bxb4 23. Rexd4 Rxd4 24. Rxd4 Ke7 25. Ne5 Bd6 26. Nxf7 Bxh2 27. Rh4 Kxf7 28. Rxh7+ Kg6 29. Rxh2 Ra8 1/2-1/2, draw in Leitao, R - Morovic Fernandez, I, Poikovsky 2001.
10...Bxf3?!
A dubious novelty. In the game Robovic, S - Lerner, K, Bern op (8) 1993 Black obtained an advantage after 10...Bxb1 11. Rxb1 dxc4 12. Bxf6 gxf6 13. d5?! Qd7 14. Nd2 Qxd5 15. Ne4 O-O-O 16. Qa4 Qc6 17. Qxc6+ bxc6 18. Rbc1?! Rd4. Better is 13. dxc5! Qxd1 14. Rexd1! Rc8 15. b4 Rg8 16. Rd4 c3 17. Rc4 e6 18. Rxc3 with a small edge to White in the endgame.
11. Qxf3 cxd4
If 11... Ne4 then 12. Be3 cxd4 13. Bxd4 Rc8 14. Na3 with better chances for White.
12. Bxf6 gxf6 13. cxd5 Rg8?!
More precise is 13... Bg7 14. Qg4 O-O 15. Qxd4 f5 16. Qd2 with some advantage to White.
14. Nd2 Bh6 15. Nb3 Qd7 16. Nxd4 Qg4 17. d6!

17...Qxf3 18. Rxe7+ Kf8
Here White has an extra pawn and a huge advantage in the ending. Black's pawns are weak and white rooks are active.
19. Nxf3 Rd8 20. Rxb7 Rxd6 21. g3 f5 22. Ne5 Rg7 23. Re1 Re6 24. Kf1 f4 25. gxf4 Bxf4 26. Nd7+ Ke8 27. Nf6+ Kf8 28. Rxe6
Black resigned. 1-0

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