B97: Sicilian Najdorf: Poisoned Pawn

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Nb3 Qa3 10. Bxf6 10. Be2 Nbd7 11. O-O Be7 12. Kh1 Qb4 13. Qe3 h6 14. Bh4 Ng4 15. Bxg4 Bxh4 16. f5 Ne5 17. Be2 Bg5 18. Qg3 Bd7 19. a3 Qb6 20. Rad1 Qe3 21. fxe6 Bxe6 22. Qxe3 Bxe3 23. Rxd6 Ke7 24. Rfd1 Rhc8 Garcia,G (2520)-Pigusov,E (2570)/Reykjavik 1994/CBM 039 ext/ 0-1 (42) 10... gxf6 11. Bd3 Bd7N 11... Nc6 12. O-O Bg7 13. Rf3 (13. f5 Bd7 14. Kh1 Qb4 15. a3 Qb6 16. Na4 Qc7 17. Qf2 Ne5 18. Nb6 Rd8 19. Nxd7 Kxd7 20. Nd4 Ke7 21. Rad1 b5 22. a4 bxa4 23. Bxa6 Rb8 24. Qg3 Bh6 25. fxe6 Qa7 26. Qxe5 1-0 Krzywkowski,M (1986)-Ulanowski,K (1777)/Gdansk 2009/CBM 131 Extra) 13... f5 14. Rg3 Bf6 15. exf5 Qb4 16. Bf1 d5 17. Re1 Ne7 18. fxe6 Bxe6 19. f5 Nxf5 20. Nxd5 Qxd2 21. Nxf6+ Ke7 22. Nxd2 Nxg3 23. Nd5+ Kf8 24. Nc7 Nxf1 25. Rxf1 Ke7 26. Nxa8 Matulovic,M-Fischer,R/Herceg Novi 1970/Fischer/0-1 (44) 12. O-O Qb4 Black has a cramped position 13. a3 White threatens to win material: a3xb4 13... Qb6+ 14. Kh1 Qc7 15. f5 Black has a cramped position 15... Nc6 Black should quickly conclude development. 16. Ne2 h5 17. fxe6 fxe6 17... Bxe6?! 18. Nc3= (<= 18. Rxf6 Bg7 19. Qg5 O-O-O-/+) 18. Rxf6 O-O-O 19. Raf1 Bg7 20. Rf7 20. R6f2 Ne5-/+ 20... Rdf8 20... Bh6 21. Qc3 Ne5 22. Qxc7+ Kxc7 23. R7f2-/+ 21. Qg5 >= 21. Rxf8+!? must be considered 21... Rxf8 22. Rxf8+ Bxf8 23. Nf4=/+ 21... Rxf7-/+ 22. Rxf7 Be5 22... >= Bh6 23. Qf6 Qd8-/+ 23. Nf4?? >= 23. Nd2!?=/+ and White is still in the game 23... Qd8 23... Nd8 and Black can already relax 24. Rg7 Qc3 25. Ne2 Qe1+ 26. Ng1 Bxg7 27. Qxg7-+ 24. Qg6? >= 24. Nh3-+ 24... Qe8 25. Rxd7 Vits återstående tid: 26 min. 25. Nxh5?? the pawn is something White will choke on 25... Ne7 26. Nf6 Nxg6 27. Nxe8 Bxe8-+ 25... Kxd7 Svarts återstående tid: 1: 09! 25... Qxd7?! 26. Nxe6 Kb8 27. h3-+ 25... Bxf4?! is clearly weaker 26. Qxe8+ Rxe8 27. Rh7= 26. Qxe8+ Rxe8 27. Nxh5 Rh8 28. g4 b5 28... >= Bb2 keeps an even firmer grip 29. a4 Ne5 30. Be2-+ 29. c4 29. Be2 doesn't do any good 29... Rb8-+ 29... Na7 29... >= b4 seems even better 30. axb4 Nxb4 31. Bf1-+ 30. Nd2 30. cxb5 axb5 31. Nd2 Rc8-+ 30... Bb2 30... Rc8 might be the shorter path 31. Ng3 Bxg3 32. hxg3-+ 31. Nb1 31. cxb5 axb5 32. Kg2 Bxa3-+ 31... Kc6 31... Rc8 might be the shorter path 32. cxb5 Nxb5 33. Kg2-+ 32. Kg2 Be5 32... Kc5!? 33. cxb5 Kd4 34. Bf1 axb5 35. Nd2-+ 33. Nd2 Bb2 34. Nb1 Nc8 34... Kc5 35. cxb5 Kd4 36. Bc2 Nxb5 37. a4-+ 35. h3 Bc1 35... Ne7 36. Nf4 e5 37. cxb5+ axb5 38. Ne6-+ 36. Kg3 >= 36. cxb5+!? axb5 37. Nc3-/+ 36... Kc5-+ 37. cxb5 axb5 38. Ng7 Rh6 38... >= Kd4!? 39. Bf1 Ke5-+ 39. h4=/+ Rg6 Black threatens to win material: Rg6xg7 40. Nh5 The knight intends Ng7-h5-g3-f5. An ideal square for the white knight. 40. Ne8 Bb2 41. h5 Rh6=/+ 40... e5 41. g5 Na7 The idea is Nc8-a7-c6-d4-e6-f4 >= 41... Bxg5!? 42. hxg5 Rxg5+ 43. Kh4 Rg2-/+ 42. Kg4= Nc6 43. Ng3 Nd4 44. Nf5 A classical outpost 44... Ne6 45. Nc3 The isolani on b5 becomes a target. White threatens to win material: Nc3xb5 45... Nf4 Praise the knight! 45... Bxg5 46. hxg5 Nxg5 47. Kh5= (47. Bxb5? is no good 47... Nxe4+ 48. Kh5 Nxc3 49. Kxg6 Nxb5-+ (49... Kxb5?! 50. Nxd6+ Kc5 51. Nf5=) ) (<= 47. Nxb5 Nxe4+ 48. Kf3 Ng5+ 49. Ke3 d5-/+) 46. Bf1 46. Bxb5 Rg8+/- (46... Bxa3? is worthless because of 47. Be8 Rg8 48. Bf7+-) 46... Bxa3 46... Ne6 47. Nxb5 Nxg5 48. hxg5 Rxg5+ 49. Kh3= 47. Nxb5+/= Exerts pressure on the backward pawn 47... Bc1 48. Nc3 >= 48. Nc7+/- 48... Bd2?? with this move Black loses his initiative >= 48... Ne6= is a viable option 49. Na4++- Kb4 50. Nb6 2 min.! 50... Bc1 15 min.! 50... Rg8 51. Nxd6 Rd8 52. Nf7+- 51. Nc8 Kc5?? the pressure is too much, Black crumbles 51... Rg8 52. Nce7 Ra8+- 52. Nce7 Re6 53. h5 Rxe7 53... Bd2 cannot undo what has already been done 54. g6 Nxg6 55. hxg6 Rxg6+ 56. Nxg6+- 54. Nxe7 Ne6 55. g6 2 min. kvar. 55... Bf4 Och här upptäckte Olle att svarts tid hade gått! 55... Bf4 56. Nf5 d5+- 1-0 [Fritz 12 (70s)]