[Event "Grand Prix Hamburg 2019"] [White "Dubov, Daniil"] [Black "Duda, Jan-Krzysztof"] [Site "Hamburg"] [Round "3.4"] [Annotator "TA"] [Result "0-1"] [Date "2019.11.13"] [WhiteElo "2699"] [BlackElo "2734"] [PlyCount "170"] 1. d4 {} g6 2. e4 Bg7 3. Nf3 d6 4. Bc4 a6 5. 0-0 b5 6. Bb3 {B06: Modern Defence} Bb7 (6... e6 7. a4 Bb7 8. Re1 Ne7 9. axb5 axb5 10. Rxa8 Bxa8 11. Qe2 c6 12. Nbd2 0-0 13. Nf1 Nd7 14. Ng3 c5 15. Bf4 c4 16. c3 e5 17. Bc2 {1/2-1/2 (17) Kobalia,M (2608)-Demidov,M (2557) Moscow 2019} )7. Re1 e6 (7... Nf6 )8. c3 {White is better.} Nd7 9. a4 Ngf6 ({Predecessor:} 9... Ne7 10. Qe2 0-0 11. Nbd2 c6 12. Nf1 h6 13. Ng3 {1-0 (40) Fernandez Romero,E (2480)-Diaz Castro,S (2224) Seville 2013} )10. Nbd2 0-0 11. Bc2 c5 12. Nf1 Qc7 13. Ng3 Rfc8 14. Bd3 b4 15. a5 c4 16. Bf1 b3 (16... bxc3 17. bxc3 Rab8 )17. Ra4 (17. Nd2 )d5 18. e5 Ne8 19. h4 Bc6 20. Ra1 Rcb8 21. h5 Rb5 22. Ng5 Nf8 23. Qf3 Ra7 24. Nh1 h6 25. Nh3 g5 26. Qd1 (26. Qe2 {feels hotter.} Rxa5 27. Rxa5 Qxa5 28. f4 gxf4 29. Bxf4 f5 30. exf6 Nxf6 31. g4 )Rxa5 27. Rxa5 Qxa5 28. f4 g4 (28... gxf4 29. N1f2 Qa2 )29. N3f2 f5 {...Qd8 is the strong threat.} 30. exf6 Nxf6 31. Ng3 ({White should try} 31. Nxg4 Nxg4 32. Qxg4 )Rf7 32. Be2 Bd7 33. Nxg4 Nxg4 34. Bxg4 Qc7 35. Ne2 (35. Qe2 )a5 36. f5 exf5 37. Bf3 {Hoping for Nf4.} Bc6 38. Bf4 Qd8 39. Qc1 Kh7 40. Be5 Ne6 41. Bxg7 ({White should play} 41. Nf4 Ng5 42. Qd1 )Rxg7 (41... Kxg7 42. Nf4 )42. Nf4 Ng5 {} 43. Qe3 {With the idea Ne6.} Qd6 {aiming for ...Qxf4!} 44. Ng6 Qg3 (44... a4 45. Ra1 Bd7 )45. Rf1 {} Rf7 (45... Qc7 )46. Qe5 { White has the initiative.} Nxf3+ 47. Rxf3 { Double Attack} Qxe5 48. Nxe5 Rf6 49. Nxc6 Rxc6 50. Rxf5 { Endgame KR-KR} a4 51. Rf7+ (51. Rxd5 {} a3 {} )Kg8 52. Ra7 Re6 {White must now prevent ...Re2.} 53. Kf2 Rf6+ 54. Ke2 Rf5 55. Rxa4 Rxh5 {Strongly threatening ...Rh1.} 56. Ra1 Rg5 57. Kf3 Rf5+ 58. Ke2 Kg7 59. Ke3 h5 60. Ke2 Kg6 61. Ra8 Rf7 62. Ra5 Rd7 63. Kf3 Kg5 64. g3 Rd8 65. Rb5 Rf8+ 66. Kg2 Kf5 (66... Rf5 )67. Rxd5+ Ke4 {} 68. Re5+ { } (68. Rxh5 {was forced to keep a grip.} Ke3 69. Rh2 )Kd3 69. d5 ({Reject} 69. Rxh5 Kc2 )(69. Re6 )Kc2 70. Re2+ Kd1 (70... Kc1 {Threatens to win with ...Rd8.} 71. Rf2 Rxf2+ 72. Kxf2 Kxb2 )71. Re5 (71. Re4 Kc1 72. Rxc4 (72. Re2 Rd8 ))Kc1 72. Re4 Rd8 73. Rxc4 Rxd5 {Black mates.} 74. Rd4 Rc5 ({And not} 74... Rxd4 75. cxd4 Kxb2 76. d5 )75. c4 Kxb2 76. Rd5 Rxc4 77. Rxh5 Kc3 78. Rh1 b2 79. Kh3 Kb3 80. Rb1 Rc1 81. Rxb2+ Kxb2 82. Kg4 Kc3 83. Kf5 Rf1+ 84. Ke5 Rg1 85. Kf4 Kd4 {Accuracy: White = 45%, Black = 65%.} 0-1