Americano R9: arreón final y fútbol

[Event "Continental"] [Site "Montevideo"] [Date "2015.05.22"] [Round "9"] [White "Cori, Jorge"] [Black "Hansen, Eric"] [Result "1-0"] [ECO "A37"] [WhiteElo "2609"] [BlackElo "2580"] [Annotator "Rodi,Luis"] [PlyCount "165"] [EventDate "2015.05.23"] [EventCountry "URU"] 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 d6 6. O-O Bf5 {A setup that was popularized by Malakhov, and recommended by GM Larry Kaufman in his opening repertoire book. Black delays developing his king's knight, leaving it the choice of somewhere other than f6.} 7. d3 Qd7 8. Rb1 {Also interesting are the alternatives 8. Nd5 and 8. Re1, with the idea of taking the bite out of ...Bh3} Bh3 9. Bxh3 Qxh3 10. Nd5 Qd7 11. Bd2 ({An alternative is} 11. Qa4 {threatening Nb6. For example,} Rc8 12. a3 e6 13. Ne3 Nge7 14. b4 O-O 15. Bb2 Bxb2 16. Rxb2 b6 $11 {Zhou Jianchao - Malakhov, Ningbo 2010}) 11... e6 12. Bc3 Bxc3 13. Nxc3 Nf6 $146 (13... Nge7 14. d4 Nf5 ({Better was} 14... cxd4 15. Ne4 O-O-O 16. Nf6 Qc7 17. Nxd4 $14) 15. d5 $16 {Sahade - Kaufman, Arlington 2011}) 14. d4 O-O 15. Qd2 ({My engine suggests} 15. dxc5 {after which} dxc5 16. Qxd7 Nxd7 17. Ne4 Rfd8 {and Black should gradually be able to restore balance.}) 15... cxd4 16. Nxd4 Nxd4 ({Or} 16... Rfd8 $5) 17. Qxd4 Qe7 18. Rfd1 Rfd8 19. Rd3 Rac8 (19... d5 $5 {A possible continuation is} 20. cxd5 Nxd5 21. Rbd1 Nxc3 22. Qxc3 Rxd3 23. Rxd3 Rd8 24. Rxd8+ Qxd8 $11) 20. Rbd1 $14 {By virtue of a space advantage, allowing better piece placement, and pawn structure.} a6 21. Qf4 $5 Rc6 {Black is playing this position much too passively.} (21... d5 $5) 22. b3 Kg7 23. a4 h6 24. Qd2 Rd7 25. a5 b6 (25... d5 26. Qb2 $14) 26. axb6 Rxb6 27. c5 $1 Rxb3 28. cxd6 (28. Qa2 $5) 28... Qd8 29. Qf4 Qa5 $2 {Hansen misses the strength of White's next move. It was vital to keep the queen in the center where it could still work both wings.} (29... a5 $5 30. Kg2 $14) 30. Nd5 $1 (30. Ne4 $1 {was also strong.}) 30... Qxd5 (30... Nxd5 31. Qe5+ f6 32. Qxe6 Rbb7 33. Rxd5 $18) 31. Rxd5 exd5 32. Qe5 {The queen is stronger here than the rook, knight, and pawns since Black's pieces are poorly coordinated. The passed pawn on d6 is another issues, which Black's next maneuver aims to eliminate.} Rb8 33. Rxd5 Re8 34. Qb2 Re6 35. Rd4 Rdxd6 36. Rxd6 Rxd6 {The evaluation of the pure queen versus rook and knight endgame is unchanged and White should win thanks to his superior queen coordination. Cori's first step is to advanace his pawns to gain more space.} 37. Kg2 Re6 38. f3 Kg8 39. Kf2 Kh7 40. Qd4 Kg8 41. e4 Kh7 42. e5 Ng8 43. f4 h5 44. h3 Ne7 45. g4 hxg4 46. hxg4 Kg7 47. Kg3 {Now the king advance to support the pawns, which will be used to create tactical threats against Black's position.} ({Nevertheless} 47. f5 $1 {would have led to a decisive breakthrough.} gxf5 48. gxf5 Nxf5 49. Qg4+ {with an endgame similar to that of the game.}) 47... Nc6 48. Qc3 Ne7 49. Qc7 Kg8 50. Kh4 Kg7 51. Kg5 Nd5 $2 (51... Ng8 $5 {actually offers unexpected resistance.} 52. Qb8 (52. f5 $2 gxf5 53. gxf5 Rxe5 $11 {is a trap White must avoid.}) 52... Ne7 53. f5 $5 gxf5 54. gxf5 f6+ 55. exf6+ Rxf6 56. Qb2 Ng8 57. Qe5 Kf8 58. Qc7 Rh6 {and Black sets up a fortress!}) 52. Qc5 {Black loses the knight now.} Ne7 53. f5 gxf5 54. gxf5 Nxf5 55. Kxf5 {Here too Black tries to set up a fortress, but the task seems doomed to failure. White's plan is to put Black in zugzwang and force him to move his pawn, which will be captured as soon as it budges.} Rg6 56. Ke4 Re6 57. Kd5 Rg6 58. Qd6 $1 {Thanks to this lovely resource, White secures passage for the king.} Re6 59. Kc6 Kg6 ({More logical was} 59... Rg6 { though even so White has} 60. Kb6 $1 (60. Kd7 Re6 61. Qxe6 $2 fxe6 62. Kxe6 a5 63. Kd7 a4 64. e6 a3 65. e7 a2 $11) (60. Kd5 Re6 {repeats the position.}) 60... Re6 61. Kxa6 {And White will win. An illustrative line is} Kg6 62. Kb5 Kf5 63. Qd7 Kg6 64. Qxe6+ $1 fxe6 65. Kc6 Kg5 66. Kd7 Kf5 67. Kd6 $18) 60. Kb7 a5 ( 60... Kf5 61. Qf8 Kg6 62. Qg8+ Kf5 63. Qxf7+ Kxe5 64. Kc7 $18) 61. Qd3+ Kg7 62. Qg3+ Kh7 63. Kc7 a4 64. Kd7 a3 65. Qd3+ Kg7 66. Qxa3 Rxe5 {If it were Black to play here he would draw easily with ...Re6! creating a fortress. However, with the rook on e5, White wins. Cori shows excellent technique in his conversion.} 67. Qg3+ Kf6 68. Qf4+ Rf5 69. Qd4+ Kg5 70. Ke7 Kh5 71. Kf8 Kg5 72. Kg7 Kh5 73. Qe4 Kg5 74. Qg2+ Kf4 75. Kf8 Ke5 76. Ke7 Kf4 77. Kd6 Ke3 78. Qg4 Rf4 79. Qg5 Ke4 80. Qg2+ Kf5 81. Ke7 Ke5 82. Qe2+ Kd5 83. Qd3+ {Black cannot save the pawn after which the rook versus queen endgame is lost, as demonstrated by Philidor in his day.} 1-0