Chess Siberia
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Dubois, Jean Marie (2242) - Vorobiov, Evgeny E (2563) [B21]
Cappelle open, Cappelle la Grande (4) 2007

Notes by Boris Schipkov

1. e4 c5 2. d4 cxd4 3. c3








   
3...dxc3
The Smith-Morra Gambit or the Morra-Matulovic Gambit or the Morra Gambit. All these chessplayers lived in 20th century. However Lionel Kieseritzky played this gambit in 1846 against Conrad Vitzthum von Eckstaedt in Paris: 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6 7. O-O Bc5.
4. Nxc3 Nc6
Usually in the Smith-Morra Gambit White has sufficient compensation for the sacrificed pawn and can make a draw.
5. Nf3 e6! 6. Bc4 Qc7
6...Nf6!? deserves attention.
7. O-O Nf6
The Siberian Variation.








   
8. Nb5!
A good move. After 8. Qe2 Ng4! White can fall into the famous Siberian Trap, Alekseev, A - Schipkov, Boris [B21], Burevestnik Russian Championship, Krasnodar 1983.
8...Qb8 9. e5








   
9...Ng4
Probably 9...a6 is even better.
10. Bf4 a6 11. Nd6+ Bxd6 12. exd6 b5 13. Nd4
After 13. Bxe6?! fxe6 14. Ng5 O-O?! 15. Qxg4 e5? (15...Bb7) 16. Qh3 h6 17. Qb3+ Kh8 18. Nf7+ White attacked in Langrock, H - Kouznetsova,E, Bonn Roettgen 1999. Stronger is 14...Nce5! 15. h3 O-O 16. Bg3 Rf5 17. Nxe6 Nf6 18. Nc7 Bb7 19. Re1 Nf7 (19...Ng6!?) 20. Rc1 Ne4 21. Nxa8 Qxa8 22. Rc7 Bc6 23. Qd4 Nfg5 24. Rxc6 Qxc6 25. h4 Qd5 26. Qxd5+ Rxd5 27. Bf4 Nf3+ 28. gxf3 Nxd6 29. Bxd6 Rxd6 30. Re8+ Kf7 31. Ra8, with a slight edge to Black.








   
13...Nxd4
Correct is 13...Nge5! 14. Bxe6 (14. Nxc6 Nxc6 15. Qg4 Kf8 16. Be2 (16. Bb3 Bb7 17. Rad1 h5 18. Qh4 Qd8 19. Bg5 f6 20. Be3, Zeller, F - Fuchs, F, Deizisau 2011, 20...Na5!? 21. Bc2 Nc4) 16...Bb7 17. Rac1 h5 18. Qh4 Kg8 19. Rfd1 Qd8 20. Bg5 f6) 14...fxe6 15. Qh5+ g6 16. Qe2 O-O 17. Bxe5 Nxd4 18. Bxd4 Qxd6 19. Be5 Qb6 20. Rfd1 Rf7 21. Rac1 Bb7 22. Rd6 Qa5 23. a3 b4 24. Qe1 Qb5 25. axb4 a5 26. Rd4 axb4 27. Rxb4 Qd5 28. f3 Rf5 29. Bg3 Bc6 30. h3 Qa5, with equality.
14. Qxd4 O-O 15. Be2
White gains a small advantage after 15. Bb3! Bb7 16. Rac1 Qd8 (16...Bc6 17. Bg5 Ne5 18. Qxe5 f6 19. Bxe6+ Kh8 20. Bxf6 Rxf6 21. Bb3 Qxd6 22. Rfe1) 17. Rc7 Bc6 18. Bd2 Nf6 19. Bg5 Rc8 20. Rxc8 Qxc8 21. Rc1.
15...Nf6
Black has real counterplay.
16. Bf3?!
16. a4 is better.








   
17...Bb7
Now Black finishes his development and has the better chances.
17. Bg5?
17. Be2 is correct.
17....Nd5! 18. Bxd5 Bxd5 19. Be7 Rc8
Black seizes the open file and gains a clear advantage.
20. b3








   
20...Rc6
20...Qb7!? is interesting.
21. Qf4?!
21. Qg4 f5 is somewhat better.
21...Qe8 22. Rae1 f5 23. Re3 Qf7
Black wins with 23...h6! 24. Rg3 Kh7.
24. Rg3 Kh8?!
24...Rac8 and 24...Rc2 are better.
25. Qd4?!
After 25. Qe5! Rg8 26. Bg5 the second player has only a small edge.








   
25...Rg8 26. Rh3 Qg6
26...f4! is better.
27. Rg3 Qh5?!
27...Qf7 is better.
28. f3 h6 29. Qa7?
White can play 29. Bf6! Qf7 30. Be5 Kh7.
29...Qe8 30. Qd4 Kh7 31. Rd1 Rc2
Black must win.
32. Qe5 Qc8 33. h4 Rxa2 34. Kh2 Bxb3 35. Rd3








   
35...Qc4?
Probably time trouble. 35...Bc4 is better.
36. f4!
A powerful move. Now White threatens to mate the black king with Bf8 and attacks Black's light-squared bishop.
36...Rf2 37. Rxb3 Rxf4 38. Rbc3 Qb4 39. Rc8 Rg4?
Correct is 39...g5 40. Rxg8 Rxh4+ 41. Rh3 Rxh3+ 42. gxh3 Kxg8 43. Qf6 Qd2+, perpetual check.








   
40. Rgc3?
The last error. Correct is 40. Rxg4 Qxg4 41. Rc7.
40...Qb2
White resigned. 0-1










Move
   

Dubois, Jean Marie (2242) - Vorobiov, Evgeny E (2563) [B21]
Cappelle op 23rd/Cappelle la Grande (4) 2007

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. O-O Nf6 8. Nb5 Qb8 9. e5 Ng4 10. Bf4 a6 11. Nd6+ Bxd6 12. exd6 b5 13. Nd4 Nxd4 14. Qxd4 O-O 15. Be2 Nf6 16. Bf3 Bb7 17. Bg5 Nd5 18. Bxd5 Bxd5 19. Be7 Rc8 20. b3 Rc6 21. Qf4 Qe8 22. Rae1 f5 23. Re3 Qf7 24. Rg3 Kh8 25. Qd4 Rg8 26. Rh3 Qg6 27. Rg3 Qh5 28. f3 h6 29. Qa7 Qe8 30. Qd4 Kh7 31. Rd1 Rc2 32. Qe5 Qc8 33. h4 Rxa2 34. Kh2 Bxb3 35. Rd3 Qc4 36. f4 Rf2 37. Rxb3 Rxf4 38. Rbc3 Qb4 39. Rc8 Rg4 40. Rgc3 Qb2 0-1


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