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Shahade, Gregory - Mezentsev, Vladimir [B77]
Koltanowski Mem, San Francisco (9) 2000

Notes by Boris Schipkov

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8. Bb3








   
8...d6
The Dragon Sicilian. In the game Shahade, Jennifer - Mezentsev, Vladimir, Koltanowski Mem, San Francisco (7), Black played 8... a5 9. a4 Ng4 10. Qxg4 Nxd4 11. Qh4 Nxb3 12. cxb3 Ra6 13. O-O f5 14. Bg5 Bf6 15. Bxf6 Raxf6 16. Nd5 Re6 17. Rfe1 fxe4 18. Rad1 d6 19. Rd4 Rf5 20. Rexe4 Rxe4 21. Qxe4 Rf7 22. h3 Bd7 with approximately equal chances (0-1, 71).
9. f3 Bd7 10. Qd2 Nxd4 11. Bxd4 b5 12. a4
Possible is 12. h4 a5 13. a4 bxa4 14. Nxa4 Be6 15. Nb6 Ra6 16. Nd5 Bxd5 17. exd5 Qc7 18. Ra4 Rb8 19. Kf2!? (unclear is 19. O-O Nd7 - another game of Macieja, B - Shirov, A, Rapid Match, 0-1, 44) 19...Nd7 20. Bxg7 Kxg7 21. h5 Nf6 22. hxg6 fxg6 23. g4 Qc5+ 24. Kg2 Rb4 25. Qh6+ Kg8 26. g5 Nh5 27. Rxh5 gxh5 28. g6 hxg6 29. Qxg6+ Kf8 30. c3 Rxa4 31. Qf5+ Kg7 32. Qg5+ with perpetual check in Macieja, B - Shirov, A, Rapid Match, Bydgoszcz 2001 (draw, 47).
12...b4 13. Ne2
Interesting is 13. Nd5 Nxd5 14. exd5 Bxd4 15. Qxd4 a5 16. h4 e5 17. dxe6 Bxe6 18. O-O-O Bxb3 19. cxb3 Re8 20. Kb1 Re2 21. h5 Qg5 22. hxg6 Qxg6+ 23. Ka2 Rae8 24. g3 R8e3 25. Rh4 Rxb3 26. Kxb3 Qc2+ 1/2-1/2, with perpetual check in Sevecek, R - Ekebjaerg, O, Wch XVI Final/corr ICCF (17) 1999.
13...Qa5 14. O-O Rab8 15. Rfd1 Rfc8 16. Ng3 Bc6 17. Nf1 Ba8 18. Qf2 Rc7 19. Rd3 Nd7! 20. Bxg7 Kxg7 21. Ne3 Rbc8 22. Nd5 Bxd5!
Black has taken the initiative.
23. Rxd5 Rc5 24. Rad1 Qb6 25. R5d2 a5 26. h3 Re5 27. Rd4 Nc5 28. Kh1?!
More precise is 28. Rc4 Qa6 29. Qe3 Nxb3 30. Rxc8 Qxc8 31. Qxb3 Rc5 32. Rd2 and Black has a small but lasting edge.
28...Nxb3 29. cxb3 Rc6 30. Qe2 Rec5 31. R4d2 Qc7!








   

A nice position. Vladimir has seized the only open file. Black has a clear advantage.
32. Qf2 Rc1 33. f4 Rxd1+ 34. Rxd1 Rc2 35. Rd2 Rc1+ 36. Kh2 Qc5 37. Qxc5 Rxc5 38. Kg3 f5! 39. Kf3 Kf6 40. Ke3 g5!
Breaking down the barriers.
41. fxg5+
Two passed pawns in the centre decided the game. Also losing 41. g3 gxf4+ 42. gxf4 fxe4 43. Kxe4 Rh5 44. Rd3 d5+! 45. Kd4 (45. Rxd5 Rxd5 46. Kxd5 Kf5 47. Kc6 Kxf4 48. Kb6 e5 49. Kxa5 e4 50. Kb6 e3 51. a5 e2 52. a6 e1Q 53. a7 Qe4) 45... e6 46. Kc5 Kf5 47. Kb6 Ke4.
41...Kxg5 42. exf5 Kxf5 43. Rf2+ Kg6 44. Kd4 h5 45. Ke4 Re5+ 46. Kd4 Rf5 47. Rc2 Kf6 48. Rc8 Rg5 49. Rc2 Ke6 50. Re2+ Kd7 51. Rc2 h4 52. Re2 e5+ 53. Kd5 Rf5 54. Re4
After 54. Rd2 Rf4 zugzwang was arisen 55. Rd3 Rf2 56. g3 hxg3 57. Rxg3 Rd2+ 58. Ke4 Rxb2 59. h4 Rh2.
54...Rf2 55. Rxh4 Rd2+ 56. Kc4 Kc6
Mate in 1 move.
White resigned. 0-1










Move
   

Shahade, Gregory P (2453) - Mezentsev, Vladimir (2376) [B77]
Koltanowski Memorial op/San Francisco (9) 2000

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8. Bb3 d6 9. f3 Bd7 10. Qd2 Nxd4 11. Bxd4 b5 12. a4 b4 13. Ne2 Qa5 14. O-O Rab8 15. Rfd1 Rfc8 16. Ng3 Bc6 17. Nf1 Ba8 18. Qf2 Rc7 19. Rd3 Nd7 20. Bxg7 Kxg7 21. Ne3 Rbc8 22. Nd5 Bxd5 23. Rxd5 Rc5 24. Rad1 Qb6 25. R5d2 a5 26. h3 Re5 27. Rd4 Nc5 28. Kh1 Nxb3 29. cxb3 Rc6 30. Qe2 Rec5 31. R4d2 Qc7 32. Qf2 Rc1 33. f4 Rxd1+ 34. Rxd1 Rc2 35. Rd2 Rc1+ 36. Kh2 Qc5 37. Qxc5 Rxc5 38. Kg3 f5 39. Kf3 Kf6 40. Ke3 g5 41. fxg5+ Kxg5 42. exf5 Kxf5 43. Rf2+ Kg6 44. Kd4 h5 45. Ke4 Re5+ 46. Kd4 Rf5 47. Rc2 Kf6 48. Rc8 Rg5 49. Rc2 Ke6 50. Re2+ Kd7 51. Rc2 h4 52. Re2 e5+ 53. Kd5 Rf5 54. Re4 Rf2 55. Rxh4 Rd2+ 56. Kc4 Kc6 0-1


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