1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2

The Classical variation of the Nimzo-Indian defence, favoured by Karpov and Kasparov.

[4... O-O LINE ONE

5. a3 Bxc3 6. Qxc3 b6 (6... Ne4 7. Qc2 f5 8. Nh3 d6 9. f3 Nf6 10. Bd2 90% for White) 7. g3 Bb7 8. Nf3 d6 (8... Ne4 9. Qc2 f5 (9... d5 10. Bg2 Nd7 11. O-O 75% 6 games ) 10. Bg2 Nf6 11. b4 Be4 12. Qc3 87% 4 games) 9. Bg2 Nbd7 10. O-O Qe7 11. b3 68% for White;

 

4... c5 LINE TWO

5. dc O-O 6. a3 Bxc5 7. Bf4 e5 8. Bg3 (8. Bxe5 ? Bxf2 9. Kxf2 Ng4) 8... Nc6 9. e3 d6 10. Bd3 Be6 11. Nf3 +=;

 

4... Nc6 LINE THREE

5. Nf3 d6 6. Bd2 O-O 7. a3 Bxc3 8. Bxc3 58% for White;

 

4... b6 LINE FOUR

5. e4 Bb7 6. Bd3 72% for White;

 

4... d6 LINE FIVE

5. e3 O-O 6. Bd3 e5 7. Nge2 57% White]

 

 

4.....d5  LINE SIX  4.... d5

5. cd ed

[5... Qxd5 6. e3 (6. Nf3 Qf5!?) 6... c5 7. Bd2 Bxc3 8. Bxc3 cd 9. Bxd4 Nc6 10. Bc3 64% for White;

5... Nxd5 6. e4 81% for White]

6. Bg5 h6 7. Bxf6 Qxf6 8. a3 Bxc3 9. Qxc3 O-O 10. e3 looks simplest, 57% for White c6

[10... Bf5 11. Ne2 Rc8 12. Ng3 Be6 13. b4 a5 14. Be2 ab 15. ab Rxa1 16. Qxa1 Qe7 17. Qc3 Nc6 18. b5 Nd8 19. O-O c6 20. bc bc 21. Rc1 Bd7 22. Qa5 Kf8 23. Qa7 Be6 24. Qb6 Qc7 25. Qb1 Kg8 26. Bd3 Qe7 27. Qc2 Bd7 28. Bh7 Kh8 29. Bf5 Bxf5 30. Nxf5 Qd7 31. Nh4 Ne6 32. Qf5 c5 33. dc Qe7 34. g3 Qd7 35. c6 Rxc6 36. Rxc6 Qxc6 37. Qxf7 Ng5 38. Qf5 Qf6 39. Qxf6 gf 40. Nf5 Kh7 41. h4

1-0, Seirawan Yasser 2605  - Tal Mikhail, Niksic 1983 It (cat.14) ]

11. Nf3 Bf5 12. Be2 Nd7 13. b4

[13. O-O Rfe8 14. b4 a6 15. a4 Re6 16. Rfc1 g5 17. b5 g4 18. Nd2 c5 19. dc Qxc3 20. Rxc3 d4 21. Rcc1 d3 22. Bd1 ab 23. e4 Bxe4 24. Bxg4 f5 25. Bd1 Bd5 26. f3 ba 27. Ra3 Ne5 28. Kf2 f4 29. Rb1 Rae8 30. Rxa4 Bc6 31. Rxf4 Ng6 32. Rg4 h5 33. Rg5 Kg7 34. Ne4 Rf8 35. Ke3 Kh6 36. Rg3 Rfe8 37. Rb4 Re5 38. Rd4 Nh4 39. Rd6 Kh7 40. Kxd3 Bxe4 41. fe Rxe4 42. Bxh5 R8e5 43. Bf7

1-0, Karpov Anatoly 2775  - Polgar Judit 2635 , Monte Carlo 1995 It "Melody Amber" (active) ]

13... Be4 14. O-O Rfe8 15. Rfc1 a6 16. a4 Rac8 17. b5 ab 18. ab c5 19. dc Qxc3 20. Rxc3 Rxc5 21. Rxc5 Nxc5 22. Nd4 Ne6 23. f3 Nxd4 24. ed Bc2 25. Kf2 Bb3 26. Ra7 Re7 27. Ra3 Bc2 28. Ke1 g5 29. Kd2 Bf5 30. g4 Be6 31. Ra8 Kg7 32. Bd3 Rc7 33. Rb8 Kf6 34. b6 Re7 35. Kc3 h5 36. h3 h4 37. Kb4 Kg7 38. Kc5 f5 39. gf Bf7 40. Bb5 Kf6 41. Kd6 Re3 42. Rxb7 Rb3 43. Bc6 Rb4 44. Rb8 Bh5 45. Bxd5 Rxd4 46. b7 Bf7 47. Rf8 Rxd5 48. Kc6 Rd1 49. b8Q Rc1 50. Kd6 Rd1 51. Kc5

1-0, Karpov Anatoly 2725  - Ljubojevic Ljubomir 2550 , Monaco 1998 It "Melody Amber" (active)  [1:0]

 

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