1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Nbd7 11. cxd5 Nxd5 if 11... exd5 12. Bd3 c5 13. Bf5 Qc7 14. Nh3 g6 15. Bxd7 Nxd7 16. O-O Rfe8 17. Nf2 Rac8 18. Qd2 h5 19. Rfe1 Qd6 20. Rad1 Qf8 21. dxc5 bxc5 22. e4 Nb6 23. exd5 Nxd5 24. Ne4 Re6 25. Qg5 Qg7 26. Rxd5 Bxd5 27. Qxd5 Qxb2 28. Rd1 c4 29. Qg5 c3 30. Rd8+ 1-0, G. Kasparov - J. Hjartarson It (active) Madrid ESP, 1989 (But Black has improved since this game was played.)
12. Bxd8 Nxc3 13. Bh4 13.Bxc7 is possible too. Below are two examples:
13. Bxc7 Nd5 14. Bd6 Nxe3 15. Kf2 Nc2 16. Rd1 Rfc8 17. Bb5 Nf6 18. Ne2 a6 19. Bd3 (19. Ba4 b5 20. Bb3 Bd5 21. Bxd5 Nxd5 22. Rd3 Rc6 23. Bc5 e5 24. b4 Nxd4 25. Nxd4 exd4 26. Rxd4 Nb6 27. Bxb6 Rxb6 28. Rc1 Re8 29. Rd3 1/2-1/2, V. Salov - A. Karpov World Cup Skelleftea SWE (3), 08.1989)
19... Nd5 20. Rc1 Nce3 21. Bf4 Nf5 22. Bxf5 exf5 23. Bd2 Rxc1 24. Rxc1 Rc8 25. h4 Rxc1 26. Bxc1 Bc6 27. Kg3 f6 28. h5 Kf7 29. Nf4 Nxf4 30. Bxf4 Ke6 31. Bc7 b5 32. Bb6 Be8 33. Kh4 Bc6 34. Bc5 a5 35. Bb6 a4 36. Bc5 Be8 37. d5+ Kxd5 38. Bf8 g5+ 39. hxg6 Bxg6 40. Bxh6 1/2-1/2, S. Atalik - Z. Ribli Geza Maroczy GM Szeged HUN (7), 20.11.1997
13... Nd5 14. Bf2 f5!? The most common alternative is 14...c5!?, however other moves have been tried as well: 14...Rac8; 14...Rfd8; 14...Ne7; 14...e5?!; and 14...N5f6.
15. Bb5!? This is a relatively new move. Other attempts have been 15.Bc4; 15.Bd3 and 15.Rc1.
15... c6 The most common response, but moving the knight to f6 or protecting it with one of the rooks or the other knight seem to be playable options.
16. Bd3 16.Ba4!? is also possible:
16. Ba4
16... e5! Attacking the center immediately and threatening to open the e-file makes sense since White has not castled yet. Kramnik tried 16...c5 in his 1998 match with Kasparov. The game continued:
16... c5 17. Ne2 Rac8 18. O-O cxd4 19. Nxd4 Ne5 20. Be2 Nc4 21. Rfc1 Ncxe3 22. Nxe6 Rfe8 23. Rxc8 Bxc8 24. Nd4 Bd7 25. Bxe3 Nxe3 26. Rc1 Rd8 27. Kf2 f4 28. g3 Nf5 29. Nxf5 Bxf5 30. Ke1 fxg3 31. hxg3 Rd7 32. b4 Kf7 33. Rc4 g5 34. f4 Be6 35. Rc6 Re7 36. Kf2 gxf4 37. gxf4 Kg7 38. Bd3 Bd5 39. Rd6 Bb3 40. f5 Rf7 41. Rg6+ Kf8 42. Rxh6 Ke7 43. Ke3 Rf6 44. Rh7+ Rf7 45. Rh4 Kd6 46. Kd4 Rf6 47. Rg4 Bf7 48. Rg7 a5 49. b5 a4 50. Be4 Be8 51. Rb7 Rf8 52. Rxb6+ Kc7 53. Re6 Bxb5 54. Ke5 Bd7 55. Re7 Kd8 56. f6 Re8 57. Kd6 Bb5 58. Bf5 Rf8 59. f7 Rh8 60. Be6 Ba6 61. Ra7 Bc8 62. Bxc8 1-0. But Black could certainly have played better.
17. Ne2 Developing the knight and preparing to castle short.
17... Rae8 18. O-O 18.Rc1 and 18.e4 have been played, but I prefer the text.
18... exd4 19. exd4 As as I know, 19.Nxe4 has not been tried. eg:
19. Nxd4 Nxe3 20. Bxe3 Rxe3 21. Bxf5
19... Nb8!? The most common response, with the idea of trading off White's good bishop .
20. Nc3 20.Rfe1; 20.Rac1
20... Ba6 21. Bxa6 Nxa6 22. Nxd5 cxd5 23. Rfe1 g5 This move appears to be new. I could not have find any practical example in my 6 million plus game database. 23... Nc7, 23...f4 and 23...Kf7 all lead to draws in the games I found.
24. Rac1 Kf7 If 24... Rxe1+ 25. Bxe1 is best.
25. Rc6!? Rxe1+! 26. Bxe1 Re8 27. Kf2 Re6 And the position appears to be dead even. It would be difficult for White to try for anything more than draw in this position, even after the exchange of rooks. If White tires to get behind the Black pawns with 28.Rc8, Black simply plays 28...Re8.
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