[Event "SUI"] [Site "SUI"] [Round "0"] [White "Geller"] [Black "Najdorf"] [Result "1-0"] [ECO "B90"] [Opening "Sicilian: Najdorf"] {The backward pawn is weak whenever the opponent can occupy the square in front of it with a piece} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. O-O Nbd7 9. f4 Qc7 10. f5 Bc4 {The advance of the White f-pawn has the advantage of preventing Black from ever play ... Pf5, but the disadvantage of leaving White's own e-pawn weak. In the given circumstances, Black can find no way of profiting from this weakening} 11. a4 $1 Rc8 12. Be3 Be7 {The result of this will be that Blakc's b-pawn will also become backward, although it will not be a glaring weakness while the b-file remains closed.} (12... b6) 13. a5 $1 h5 14. Bxc4 Qxc4 15. Ra4 Qc7 16. h3 h4 { No lack of backward pawns in this game! White's g-pawn now adds to the number. It gives Black no practical advantage at present, however, since g3 is inaccessible ( ... Nh5 would give away the vital d5 square)} 17. Rf2 b5 { Black resorts to violence, and quite correctly, for a waiting policy would only allow White to carry out at leisure his plans for the conquest of d5 by Rd2, Bg5 andBxf6} (17... -- 18. Rd2 -- 19. Bg5 -- 20. Bxf6 {Conquest for d5}) 18. axb6 Nxb6 19. Bxb6 {In this position the Black Knight is more valuable than the White Bishop simply for the reason the Bishop can't be brought to be on d5.} (19. Rxa6 Nc4 20. Bc1 Qb7 {double attack}) 19... Qxb6 20. Qe2 Ra8 21. Kh2 O-O 22. Rf1 Ra7 23. Rfa1 Rfa8 24. R1a2 Bd8 25. Na5 Rc8 26. Nc4 Qc6 27. Ne3 $1 {The d5 square is the key to the position.} (27. b3 d5 $1 { Black's position is suddenly free}) 27... a5 28. Rc4 Qa6 29. b3 Bb6 30. Rxc8+ Qxc8 31. Ned5 Nxd5 32. Nxd5 {The battle for d5 is won. It remains only to convert the advantage gained into a win} 32... Qc5 33. Ra1 Qf2 34. Qxf2 Bxf2 35. Rf1 Bd4 (35... Bg3+ 36. Kg1 { Things are easier for White since the Bishop is out of the way}) 36. c3 Bc5 37. g4 {Necessary to get the White King in play} 37... hxg3+ 38. Kxg3 Rb7 39. Rb1 f6 (39... a4 40. b4) 40. Kf3 Kf7 41. Ke2 Rb8 42. b4 g6 43. Kd3 $2 (43. fxg6+ { quicker} 43... Kxg6 44. bxc5 Rxb1 45. c6 Rb8 46. c7 Rc8 47. Ne7+) 43... gxf5 44. exf5 axb4 45. cxb4 Bd4 46. Rc1 Kg7 (46... Rb7 47. Rc7+ $18) 47. Rc7+ Kh6 48. Ke4 Kg5 49. Rh7 Bf2 (49... -- 50. h4+ Kg4 51. Nxf6+) 50. Rg7+ Kh4 51. Kf3 Be1 52. Kg2 Rf8 (52... -- 53. Rg4+ Kh5 54. Nxf6+ Kh6 55. Rg6#) 53. b5 Ba5 54. b6 Bxb6 55. Nxb6 Rb8 56. Rg4+ Kh5 57. Nd5 Rb2+ 58. Kf3 Rb3+ 59. Ke4 Rxh3 60. Nxf6+ Kh6 61. Rg6# 1-0