Spectacular incursion of the King
Posted: Sun Jan 13, 2019 1:39 pm
In the following game from a test, the King of Lc0 made a spectacular incursion into enemy territory, with queen, two rooks and two minor pieces present on the board. The risk of checkmate was diminished by two advanced pawns that caused poor coordination of enemy pieces.
The test was done with Balsa_Top25.pgn, Lc0.20.1 32367 RTX 2070 vs Stockfish 10 on 6 cores of i7 4790S, 15 minutes plus 3 sec.
In the position number 8 with SF10 playing White and Lc0 Black, after the best 8... h5, Lc0 played the pawn sacrifice 18...h4!
obtaining as compensation a strong attack on the kingside.
the dangerous advance of the f and e pawns strangled the White position
The incursion of the Black King to h4 seemed crazy with queen, two rooks and two minor pieces present on the board.
the entry in g3 and capture of the g2 pawn resulted in the collapse of the enemy position.
[pgn][Event "lc0201_32367_32467SF10Balsa15p3"] [Site "Ros_4790S"] [Date "2019.01.10"] [Round "17"] [White "stockfish_10_x6"] [Black "lc0201_32367"] [Result "0-1"] [ECO "B90"] [Opening "Sicilian"] [Variation "Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3"] [TimeControl "900+3"] [Termination "normal"] [PlyCount "181"] [WhiteType "human"] [BlackType "human"] 1. e4 {book} c5 {book} 2. Nf3 {book} d6 {book} 3. d4 {book} cxd4 {book} 4. Nxd4 {book} Nf6 {book} 5. Nc3 {book} a6 {book} 6. Be3 {book} e5 {book} 7. Nb3 {book} Be6 {book} 8. f3 {book} h5 {-0.33/12 12} 9. Nd5 {+0.85/30 43} Bxd5 {-0.26/15 12} 10. exd5 {+0.68/27 14} g6 {-0.34/16 36} 11. Qd2 {+0.68/28 17} Nbd7 {-0.37/17 21} 12. Be2 {+0.59/27 20} Bg7 {-0.14/12 17} 13. O-O {+0.53/25 16} b6 {-0.17/11 19} 14. h3 {+0.57/28 47} O-O {-0.02/10 30} 15. Rad1 {+0.43/25 14} Qc7 {+0.05/10 21} 16. c4 {+0.90/25 16} a5 {+0.11/12 12} 17. Na1 {+0.91/27 12} Nc5 {+0.24/13 30} 18. Nc2 {+0.96/31 12} h4 {+0.31/15 15} 19. Bg5 {+1.08/27 14} Nh5 {+0.36/14 14} 20. Bxh4 {+0.70/29 31} f5 {+0.38/14 11} 21. Na3 {+0.67/30 56} Bf6 {+0.40/16 19} 22. Bxf6 {+0.67/31 18} Rxf6 {+0.60/15 22} 23. Nb5 {+0.71/31 21} Qg7 {+0.66/17 19} 24. Qg5 {+0.70/33 41} Nf4 {+0.66/18 15} 25. Rd2 {+1.11/24 8.5s} Kf7 {+1.32/15 26} 26. Kf2 {-1.23/30 117s} Rh8 {+1.30/16 14} 27. Ke1 {-1.45/30 29} Nh5 {+1.24/17 15} 28. Qe3 {0.00/27 9.2s} Ng3 {+1.22/18 13} 29. Rg1 {0.00/31 6.0s} f4 {+1.26/18 15} 30. Qc3 {-0.50/34 112s} e4 {+1.30/17 13} 31. Kd1 {-0.49/28 10} Re8 {+1.30/16 10} 32. Qc2 {-0.68/30 14} e3 {+1.30/12 36} 33. Rd4 {+0.19/32 7.0s} Kg8 {+1.22/12 48} 34. Kc1 {+0.29/30 5.7s} Rff8 {+1.14/13 43} 35. Re1 {+0.28/33 15} Qf6 {+1.13/12 21} 36. b3 {+0.17/33 19} Re5 {+0.95/11 28} 37. Rdd1 {+0.09/32 17} Nf5 {+0.84/12 22} 38. Rg1 {+0.08/33 8.9s} Kg7 {+1.19/10 18} 39. Kb1 {+0.08/33 5.2s} Kh6 {+1.42/10 11} 40. Qb2 {+0.08/34 11} Kg5 {+1.35/12 9.5s} 41. Nd4 {+0.21/24 7.7s} Kh4 {+1.58/12 11} 42. Kc2 {+0.36/27 10} Ng3 {+1.84/10 16} 43. Rge1 {+0.26/30 16} Nf5 {+1.83/11 16} 44. Qc3 {+0.21/29 20} Re7 {+1.67/12 23} 45. Rg1 {+0.15/31 30} Ng3 {+1.67/12 4.1s} 46. Rge1 {+0.15/31 3.5s} Nf5 {+1.52/12 15} 47. Kb2 {+0.15/33 9.6s} Qe5 {+2.09/10 18} 48. Rh1 {+0.15/30 5.3s} Ng3 {+2.10/13 18} 49. Rhg1 {+0.15/33 5.3s} Ra8 {+2.10/9 17} 50. Rge1 {+0.15/31 11} Nf5 {+1.95/13 7.6s} 51. Kb1 {+0.13/29 9.1s} Rae8 {+1.95/9 18} 52. Rg1 {+0.13/29 4.1s} Ng3 {+1.95/10 5.6s} 53. Rge1 {+0.23/33 17} Nf5 {+1.82/10 12} 54. Rg1 {+0.15/33 4.8s} Ng3 {+1.78/11 5.5s} 55. Qc2 {+0.13/31 4.5s} Qf6 {+2.50/9 12} 56. Qb2 {+0.13/34 16} Rf7 {+2.63/10 13} 57. Rge1 {+0.13/27 2.7s} Nf5 {+2.46/11 9.2s} 58. Rh1 {+0.13/28 10} Ng3 {+2.21/9 17} 59. Rhe1 {+0.13/30 2.6s} Nf5 {+2.04/12 11} 60. Kc2 {+0.13/29 16} Kg3 {+3.52/10 14} 61. Rg1 {+1.63/27 4.3s} Kh4 {+1.81/9 9.4s} 62. Nxf5+ {+0.28/29 6.2s} Qxf5+ {+1.15/13 5.8s} 63. Kc1 {+0.32/31 3. 8s} Qg5 {+0.99/14 5.0s} 64. Kb1 {0.00/33 27} Qg3 {+1.22/11 17} 65. Qd4 {0.00/25 2.7s} Re5 {+1.07/11 5.2s} 66. Rde1 {+0.23/25 3.6s} Rfe7 {+0.90/12 13} 67. Bd1 {+0.98/27 5.4s} e2 {+0.24/14 12} 68. Bc2 {+1.84/22 1.2s} Re8 {+0.19/13 5.6s} 69. Kc1 {+1.54/30 20} Re3 {+0.06/14 11} 70. Bxg6 {+1.11/27 3.7s} R8e5 {+0.04/12 3.6s} 71. Bc2 {+1.00/29 4.6s} Rh5 {+0.03/10 8.3s} 72. Kd2 {+1.03/28 3.4s} Rhe5 {+0.03/10 2.6s} 73. Kc1 {+0.78/27 2.5s} Nd7 {+0.02/6 16} 74. Rh1 {+0.68/30 7.6s} Re8 {+0.84/12 5. 0s} 75. Rhg1 {+0.68/27 3.0s} a4 {+1.42/10 5.7s} 76. Bg6 {0.00/26 6.6s} Rg8 {+1.38/12 5.8s} 77. Bh7 {0.00/27 2.8s} Ra8 {+1.75/11 6.7s} 78. bxa4 {-0.04/27 3.4s} Ne5 {+1.78/11 6.7s} 79. Bc2 {0.00/28 2.5s} Rg8 {+1.75/14 14} 80. Kb2 {0.00/28 1.8s} Rc8 {+2.99/10 5.6s} 81. Kb1 {-0.25/27 2.7s} Rxc4 {+4.40/11 3.6s} 82. Qxb6 {0.00/21 1.3s} Qg5 {+4.96/14 4.9s} 83. Qb2 {-2.73/22 6.5s} Kg3 {+5.24/16 4.2s} 84. h4 {-3.23/25 3.5s} Qe7 {+5.67/11 6.9s} 85. Rh1 {-4.09/24 3.0s} Rc7 {+9.11/12 5.9s} 86. Bb3 {-5.58/21 3.0s} Nd3 {+13.62/12 6.1s} 87. Qd2 {-9.93/22 3.0s} Nxe1 {+14.74/11 2.8s} 88. Qxe1+ {-11.23/22 3.0s} Kxg2 {+13.44/11 0.049s} 89. Bc2 {-11.96/22 3.0s} Rxc2 {+16.50/12 6.2s} 90. Kxc2 {-13.43/22 3.0s} Qc7+ {+17.84/12 3.9s} 91. Kb1 {-M34/31 adjudication 2.5s, Black wins by adjudication} 0-1 [/pgn]
The test was done with Balsa_Top25.pgn, Lc0.20.1 32367 RTX 2070 vs Stockfish 10 on 6 cores of i7 4790S, 15 minutes plus 3 sec.
In the position number 8 with SF10 playing White and Lc0 Black, after the best 8... h5, Lc0 played the pawn sacrifice 18...h4!
obtaining as compensation a strong attack on the kingside.
the dangerous advance of the f and e pawns strangled the White position
The incursion of the Black King to h4 seemed crazy with queen, two rooks and two minor pieces present on the board.
the entry in g3 and capture of the g2 pawn resulted in the collapse of the enemy position.
[pgn][Event "lc0201_32367_32467SF10Balsa15p3"] [Site "Ros_4790S"] [Date "2019.01.10"] [Round "17"] [White "stockfish_10_x6"] [Black "lc0201_32367"] [Result "0-1"] [ECO "B90"] [Opening "Sicilian"] [Variation "Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3"] [TimeControl "900+3"] [Termination "normal"] [PlyCount "181"] [WhiteType "human"] [BlackType "human"] 1. e4 {book} c5 {book} 2. Nf3 {book} d6 {book} 3. d4 {book} cxd4 {book} 4. Nxd4 {book} Nf6 {book} 5. Nc3 {book} a6 {book} 6. Be3 {book} e5 {book} 7. Nb3 {book} Be6 {book} 8. f3 {book} h5 {-0.33/12 12} 9. Nd5 {+0.85/30 43} Bxd5 {-0.26/15 12} 10. exd5 {+0.68/27 14} g6 {-0.34/16 36} 11. Qd2 {+0.68/28 17} Nbd7 {-0.37/17 21} 12. Be2 {+0.59/27 20} Bg7 {-0.14/12 17} 13. O-O {+0.53/25 16} b6 {-0.17/11 19} 14. h3 {+0.57/28 47} O-O {-0.02/10 30} 15. Rad1 {+0.43/25 14} Qc7 {+0.05/10 21} 16. c4 {+0.90/25 16} a5 {+0.11/12 12} 17. Na1 {+0.91/27 12} Nc5 {+0.24/13 30} 18. Nc2 {+0.96/31 12} h4 {+0.31/15 15} 19. Bg5 {+1.08/27 14} Nh5 {+0.36/14 14} 20. Bxh4 {+0.70/29 31} f5 {+0.38/14 11} 21. Na3 {+0.67/30 56} Bf6 {+0.40/16 19} 22. Bxf6 {+0.67/31 18} Rxf6 {+0.60/15 22} 23. Nb5 {+0.71/31 21} Qg7 {+0.66/17 19} 24. Qg5 {+0.70/33 41} Nf4 {+0.66/18 15} 25. Rd2 {+1.11/24 8.5s} Kf7 {+1.32/15 26} 26. Kf2 {-1.23/30 117s} Rh8 {+1.30/16 14} 27. Ke1 {-1.45/30 29} Nh5 {+1.24/17 15} 28. Qe3 {0.00/27 9.2s} Ng3 {+1.22/18 13} 29. Rg1 {0.00/31 6.0s} f4 {+1.26/18 15} 30. Qc3 {-0.50/34 112s} e4 {+1.30/17 13} 31. Kd1 {-0.49/28 10} Re8 {+1.30/16 10} 32. Qc2 {-0.68/30 14} e3 {+1.30/12 36} 33. Rd4 {+0.19/32 7.0s} Kg8 {+1.22/12 48} 34. Kc1 {+0.29/30 5.7s} Rff8 {+1.14/13 43} 35. Re1 {+0.28/33 15} Qf6 {+1.13/12 21} 36. b3 {+0.17/33 19} Re5 {+0.95/11 28} 37. Rdd1 {+0.09/32 17} Nf5 {+0.84/12 22} 38. Rg1 {+0.08/33 8.9s} Kg7 {+1.19/10 18} 39. Kb1 {+0.08/33 5.2s} Kh6 {+1.42/10 11} 40. Qb2 {+0.08/34 11} Kg5 {+1.35/12 9.5s} 41. Nd4 {+0.21/24 7.7s} Kh4 {+1.58/12 11} 42. Kc2 {+0.36/27 10} Ng3 {+1.84/10 16} 43. Rge1 {+0.26/30 16} Nf5 {+1.83/11 16} 44. Qc3 {+0.21/29 20} Re7 {+1.67/12 23} 45. Rg1 {+0.15/31 30} Ng3 {+1.67/12 4.1s} 46. Rge1 {+0.15/31 3.5s} Nf5 {+1.52/12 15} 47. Kb2 {+0.15/33 9.6s} Qe5 {+2.09/10 18} 48. Rh1 {+0.15/30 5.3s} Ng3 {+2.10/13 18} 49. Rhg1 {+0.15/33 5.3s} Ra8 {+2.10/9 17} 50. Rge1 {+0.15/31 11} Nf5 {+1.95/13 7.6s} 51. Kb1 {+0.13/29 9.1s} Rae8 {+1.95/9 18} 52. Rg1 {+0.13/29 4.1s} Ng3 {+1.95/10 5.6s} 53. Rge1 {+0.23/33 17} Nf5 {+1.82/10 12} 54. Rg1 {+0.15/33 4.8s} Ng3 {+1.78/11 5.5s} 55. Qc2 {+0.13/31 4.5s} Qf6 {+2.50/9 12} 56. Qb2 {+0.13/34 16} Rf7 {+2.63/10 13} 57. Rge1 {+0.13/27 2.7s} Nf5 {+2.46/11 9.2s} 58. Rh1 {+0.13/28 10} Ng3 {+2.21/9 17} 59. Rhe1 {+0.13/30 2.6s} Nf5 {+2.04/12 11} 60. Kc2 {+0.13/29 16} Kg3 {+3.52/10 14} 61. Rg1 {+1.63/27 4.3s} Kh4 {+1.81/9 9.4s} 62. Nxf5+ {+0.28/29 6.2s} Qxf5+ {+1.15/13 5.8s} 63. Kc1 {+0.32/31 3. 8s} Qg5 {+0.99/14 5.0s} 64. Kb1 {0.00/33 27} Qg3 {+1.22/11 17} 65. Qd4 {0.00/25 2.7s} Re5 {+1.07/11 5.2s} 66. Rde1 {+0.23/25 3.6s} Rfe7 {+0.90/12 13} 67. Bd1 {+0.98/27 5.4s} e2 {+0.24/14 12} 68. Bc2 {+1.84/22 1.2s} Re8 {+0.19/13 5.6s} 69. Kc1 {+1.54/30 20} Re3 {+0.06/14 11} 70. Bxg6 {+1.11/27 3.7s} R8e5 {+0.04/12 3.6s} 71. Bc2 {+1.00/29 4.6s} Rh5 {+0.03/10 8.3s} 72. Kd2 {+1.03/28 3.4s} Rhe5 {+0.03/10 2.6s} 73. Kc1 {+0.78/27 2.5s} Nd7 {+0.02/6 16} 74. Rh1 {+0.68/30 7.6s} Re8 {+0.84/12 5. 0s} 75. Rhg1 {+0.68/27 3.0s} a4 {+1.42/10 5.7s} 76. Bg6 {0.00/26 6.6s} Rg8 {+1.38/12 5.8s} 77. Bh7 {0.00/27 2.8s} Ra8 {+1.75/11 6.7s} 78. bxa4 {-0.04/27 3.4s} Ne5 {+1.78/11 6.7s} 79. Bc2 {0.00/28 2.5s} Rg8 {+1.75/14 14} 80. Kb2 {0.00/28 1.8s} Rc8 {+2.99/10 5.6s} 81. Kb1 {-0.25/27 2.7s} Rxc4 {+4.40/11 3.6s} 82. Qxb6 {0.00/21 1.3s} Qg5 {+4.96/14 4.9s} 83. Qb2 {-2.73/22 6.5s} Kg3 {+5.24/16 4.2s} 84. h4 {-3.23/25 3.5s} Qe7 {+5.67/11 6.9s} 85. Rh1 {-4.09/24 3.0s} Rc7 {+9.11/12 5.9s} 86. Bb3 {-5.58/21 3.0s} Nd3 {+13.62/12 6.1s} 87. Qd2 {-9.93/22 3.0s} Nxe1 {+14.74/11 2.8s} 88. Qxe1+ {-11.23/22 3.0s} Kxg2 {+13.44/11 0.049s} 89. Bc2 {-11.96/22 3.0s} Rxc2 {+16.50/12 6.2s} 90. Kxc2 {-13.43/22 3.0s} Qc7+ {+17.84/12 3.9s} 91. Kb1 {-M34/31 adjudication 2.5s, Black wins by adjudication} 0-1 [/pgn]