Fourth LTC Chess Festival,
Open Source Chess Engines
Stockfish 9 vs. Sugar vs. Booot vs. Gull.
Cuarto Festival LTC de Ajedrez,
entre Módulos de Ajedrez de Código Abierto.
Luego de observar algunas partidas entre los módulos Stockfish (SF) 8 y AlphaZero (A0), y con la aparición del nuevo SF9, tuve la curiosidad por indagar los movimientos que haría SF9 sobre las mismas partidas ya jugadas entre SF8 y A0.
Mi indagación siguió el método de ubicarme al final de una partida y a partir de allí fui recorriendo sobre cada uno de los movimientos de A0, al mismo tiempo que SF9 estuvo analizando los movimientos de su antecesor SF8.
Luego de detectar una diferencia significativa, es que realizé un festival de partidas entre algunas versiones recientes de SF y otros módulos destacados. Desde luego, no es lo mismo que enfrentar a SF9 contra una inteligencia artificial como A0, sin embargo, creo que estos ensayos nos facilitarán la evaluación de las posibles variantes en cada partida.
Es así que, les hago entrega de este grupo de partidas, basado en la partida numero 99, donde ahora SF9 suele preferir su respuesta con el movimiento 21. .. Kg7.
Mi indagación siguió el método de ubicarme al final de una partida y a partir de allí fui recorriendo sobre cada uno de los movimientos de A0, al mismo tiempo que SF9 estuvo analizando los movimientos de su antecesor SF8.
Luego de detectar una diferencia significativa, es que realizé un festival de partidas entre algunas versiones recientes de SF y otros módulos destacados. Desde luego, no es lo mismo que enfrentar a SF9 contra una inteligencia artificial como A0, sin embargo, creo que estos ensayos nos facilitarán la evaluación de las posibles variantes en cada partida.
Es así que, les hago entrega de este grupo de partidas, basado en la partida numero 99, donde ahora SF9 suele preferir su respuesta con el movimiento 21. .. Kg7.
After observing some games between the Stockfish (SF) 8 and AlphaZero (A0) modules, and with the appearance of the new SF9, I had the curiosity to investigate the movements SF9 would make on the same games already played between SF8 and A0.
My inquiry followed the method of locating me at the end of a game and from there I went over each of the movements of A0, at the same time that SF9 was analyzing the movements of its predecessor SF8.
After detecting a significant difference, I made a festival of games between some recent versions of SF and other featured modules. Of course, it is not the same as facing SF9 against an artificial intelligence like A0, however, I believe that these tests will facilitate the evaluation of possible variants in each game.
So, I give you this group of games, based on the game number 99, where now SF9 usually prefers its response with the movement 21. .. Kg7.
PGN games:
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.01.31"]
[Round "1"]
[White "Gull_3.1_jv"]
[Black "Stockfish-9_180131"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "115"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3 Kg7 22. Rad1 Qe6 23. hxg5 Qf7 24. Bd4 Bf5 25. g4 b5 26. Qa5
Be6 27. Qc7 Nd7 28. Qxc6 Ne5 29. gxf6+ Bxf6 30. Bxe5 Bxe5 31. Qc5 Bf6 32.
Bxa8 Bxg4 33. Bd5 Qg6 34. Be4 Bf5+ 35. Bg2 Bg4 36. f3 Bxf3 37. Rd2 Bd8 38.
Qd6 Bg4 39. Qe5+ Bf6 40. Qc5 Rf7 41. a3 h6 42. Rf1 Re7 43. Rdf2 Qg5 44. Qc6
Be5 45. Qa8 Be6 46. Qf8+ Kg6 47. Re1 Bd5 48. Ree2 Bf7 49. Qd8 Bc4 50. Re4
h5 51. a4 a6 52. a5 Re6 53. Qc8 Re7 54. Qf8 Bd3 55. Re1 Bc4 56. Re4 Bd5 57.
Ree2 Bc4 58. Re4 {3-fold repetition} 1/2-1/2
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.01"]
[Round "2"]
[White "Stockfish-9_180131"]
[Black "Gull_3.1_jv"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "139"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20.
h4 f6 21. Be3 Kg7 22. Rad1 Qe6 23. Bd4 Qf7 24. hxg5 b5 25. Qa5 Kg8 26. Qc7
Be6 27. gxf6 Bxf6 28. Qxf7+ Kxf7 29. Bxf6 Kxf6 30. Rd6 Re8 31. Bh3 a5 32.
Bxe6 Kg7 33. Re5 Ra6 34. Rc5 a4 35. f4 Kf8 36. Bg4 Ra7 37. Kf2 a3 38. Rf5+
Kg7 39. Rh5 Kh8 40. Bf5 Rg7 41. Rdh6 Ree7 42. Kf3 Ra7 43. Rd6 Rg8 44. g4
Re7 45. Re6 Rc7 46. Be4 Rf8 47. Reh6 Rff7 48. g5 Rce7 49. Bg6 Rg7 50. Bc2
Nd7 51. f5 Ref7 52. f6 Kg8 53. Ke3 Nf8 54. fxg7 Rxg7 55. Bb3+ Kh8 56. Rxc6
Re7+ 57. Kf3 Kg7 58. Bc2 Rb7 59. Rc8 Rf7+ 60. Kg3 Rb7 61. Rh6 Re7 62. Bb3
Re5 63. Rc7+ Kh8 64. g6 Rg5+ 65. Kf4 Rxg6 66. Rxg6 hxg6 67. Kg5 Nh7+ 68.
Kh6 Nf8 69. Rc8 b4 70. Rxf8# 1-0
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.03"]
[Round "1"]
[White "Booot_62"]
[Black "Stockfish-9_180131"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "121"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4
f6 21. Be3 Kg7 22. Rad1 Qe6 23. hxg5 Qf7 24. Bd4 Bf5 25. g4 b5 26. Qa5 Be6
27. Qc7 Nd7 28. Qxc6 Ne5 29. gxf6+ Bxf6 30. Bxe5 Bxe5 31. Qc5 Bf6 32. Bxa8
Bxg4 33. Bd5 Qg6 34. Be4 Bf5+ 35. Bg2 Bg4 36. f3 Bxf3 37. Rd2 Bd8 38. Qd6
Bg4 39. Qd4+ Kh6 40. Qe5 Bb6+ 41. Kh1 Qh5+ 42. Qxh5+ Kxh5 43. Re5+ Kh4 44.
Rxb5 Rc8 45. Rb3 h5 46. Bd5 Re8 47. Rb1 Re3 48. Rc1 Bc5 49. c4 Ba3 50. Rg1
Bc5 51. Rb1 Rc3 52. Rh2+ Kg5 53. Rhb2 Rh3+ 54. Kg2 h4 55. Rb3 Be3 56. Be4
Kf4 57. Bd5 Rg3+ 58. Kh1 Rh3+ 59. Kg2 Rg3+ 60. Kh2 Rh3+ 61. Kg2 {3-fold
repetition} 1/2-1/2
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.03"]
[Round "2"]
[White "Stockfish-9_180131"]
[Black "Booot_62"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "153"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4
f6 21. Be3 Kg7 22. Rad1 Qe6 23. Bd4 Qf7 24. hxg5 Kg8 25. Rd3 Bd7 26. gxf6
Bd8 27. Qd1 Bf5 28. Be4 Bg6 29. Bc5 bxc5 30. Rxd8 Qxf6 31. Rxf8+ Kxf8 32.
Bxg6 hxg6 33. Qg4 Nd7 34. Qxd7 Kg8 35. Re6 Qf5 36. Qxc6 Rf8 37. Rxg6+ Kh7
38. Rh6+ Kg7 39. f4 Rd8 40. Rd6 Rxd6 41. Qxd6 Qb1+ 42. Kf2 Qxa2+ 43. Ke3
Qc4 44. Qe5+ Kf7 45. g4 Qb5 46. g5 Qb1 47. Qf6+ Kg8 48. f5 Qe1+ 49. Kf4
Qd2+ 50. Ke4 Qc2+ 51. Kd5 Qd3+ 52. Kxc5 Qe3+ 53. Kb4 Qe4+ 54. c4 Qd3 55.
Qe6+ Kf8 56. f6 Qb1+ 57. Kc5 Qg1+ 58. Kc6 Qb6+ 59. Kd5 Qb7+ 60. Kc5 Qc7+
61. Kb4 Qd8 62. Qe7+ Qxe7+ 63. fxe7+ Kxe7 64. c5 Kd7 65. g6 Ke6 66. c6 Kd6
67. g7 Kxc6 68. g8=Q Kd6 69. Qg5 Ke6 70. Kc5 a6 71. Qd5+ Kf6 72. Kd6 a5 73.
Qf3+ Kg7 74. Ke6 Kg6 75. Qg3+ Kh6 76. Kf6 Kh5 77. Qh3# 1-0
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.04"]
[Round "1"]
[White "Sugar_xpro.220118"]
[Black "Stockfish-9_180131"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "58"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4
f6 21. Be3 Bf5 22. Rad1 Qa3 23. hxg5+ fxg5 24. Qh4+ Kg6 25. Qh1 Kg7 26. Bc1
Qc5 27. Be3 Qa3 28. Bc1 Qc5 29. Be3 Qa3 {3-fold repetition} 1/2-1/2
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.04"]
[Round "2"]
[White "Stockfish-9_180131"]
[Black "Sugar_xpro.220118"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "221"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3 Kg7 22. Rad1 Qe6 23. Bd4 Qf7 24. hxg5 Bf5 25. g4 b5 26. Qa5
Be6 27. Qc7 Nd7 28. Qxc6 Ne5 29. gxf6+ Bxf6 30. Bxe5 Bxe5 31. Qc5 Bf6 32.
Bxa8 Bxg4 33. Bd5 Qg6 34. Be4 Bf5+ 35. Bg2 Bg4 36. Be4 Bf5+ 37. Bg2 Bg4 38.
f3 Bxf3 39. Rd2 Bd8 40. Qd6 Bg4 41. Qe5+ Bf6 42. Qc5 Rf7 43. Re4 h5 44. Rf2
Rd7 45. Re5 Rf7 46. Re8 a6 47. Qd5 Qg5 48. Qxg5+ Bxg5 49. Bd5 Rf5 50. Be6
Rc5 51. Rf7+ Kg6 52. Rg8+ Kh6 53. Bxg4 hxg4 54. Kg2 Rxc3 55. Rf1 Bh4 56.
Rxg4 Kh5 57. Rf3 Rc5 58. Rg8 Bg5 59. Ra8 Rc6 60. Ra3 Kg4 61. R8xa6 Rc2+ 62.
Kf1 b4 63. Rb3 Rc4 64. Ke2 Rd4 65. Rb2 Bc1 66. Rb1 Bf4 67. Rd1 Rc4 68. Kd3
Rc3+ 69. Kd4 Ra3 70. Rf6 Kg5 71. Rf8 Be3+ 72. Ke4 Kg6 73. Rdf1 Bh6 74. Rg1+
Kh7 75. Rf7+ Kh8 76. Rg6 Rh3 77. Kd5 Bc1 78. Rc6 Kg8 79. Rb7 Bh6 80. Rc8+
Bf8 81. Rxb4 Rh5+ 82. Ke6 Rh6+ 83. Ke5 Rh5+ 84. Kf6 Rh6+ 85. Kg5 Rc6 86.
Ra8 Rc5+ 87. Kf6 Rc6+ 88. Ke5 Rc5+ 89. Ke6 Rc6+ 90. Kd7 Rd6+ 91. Kc7 Rd2
92. Rbb8 Rc2+ 93. Kd7 Kh7 94. Rxf8 Rd2+ 95. Ke6 Re2+ 96. Kf5 Rf2+ 97. Kg4
Rg2+ 98. Kf3 Rg7 99. Kf4 Rb7 100. Rh8+ Kg6 101. Rag8+ Rg7 102. Rxg7+ Kxg7
103. Re8 Kf6 104. Re1 Kg6 105. Re6+ Kh7 106. Kg5 Kg7 107. Re7+ Kf8 108. Kf6
Kg8 109. Re8+ Kh7 110. Rf8 Kh6 111. Rh8# 1-0
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.05"]
[Round "1"]
[White "Stockfish_18020517"]
[Black "Stockfish-9_180131"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "189"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4
f6 21. Be3 b5 22. Qe4 Rf7 23. a4 Kg7 24. axb5 a5 25. Rad1 Qe5 26. Qb1 Bf5
27. Qb2 Bd7 28. hxg5 Qf5 29. Be4 Qxe4 30. gxf6+ Bxf6 31. Bh6+ Kxh6 32. Rxe4
cxb5 33. Qe2 Kg7 34. Qf3 Ra6 35. Qf4 Ra8 36. Rd6 Ra6 37. Rd5 Rb6 38. Rh5
Nc6 39. Qe3 Ra6 40. Qh6+ Kg8 41. Rxb5 Bg7 42. Qg5 Ra7 43. Qd5 a4 44. Rf4
Be8 45. Rxf7 Rxf7 46. Rb7 Ne5 47. Re7 Bc6 48. Qd8+ Rf8 49. Rxg7+ Kxg7 50.
Qc7+ Kg6 51. Qxe5 Bf3 52. Qe6+ Rf6 53. Qe8+ Kg7 54. Qd7+ Kg8 55. Qe7 Rf8
56. Qe6+ Kg7 57. Qd7+ Kg6 58. Qxa4 Ra8 59. Qc2+ Kf6 60. Qb2 Kf7 61. Kh2 Ra6
62. Qd2 Rg6 63. Qf4+ Rf6 64. Qc7+ Kg6 65. Qd8 Kg7 66. Qe7+ Kg6 67. c4 h6
68. Kh3 Rf7 69. Qe8 Kg7 70. g4 Rf8 71. Qd7+ Rf7 72. Qd4+ Rf6 73. Kh4 Kf7
74. Qd7+ Kg8 75. Qe7 Rf8 76. Kg3 Ba8 77. f4 Bh1 78. f5 Rf7 79. Qe6 Bb7 80.
c5 Kf8 81. c6 Bxc6 82. Qxh6+ Ke7 83. Qxc6 Kd8 84. f6 Rd7 85. Qf3 Kc8 86. f7
Rd8 87. f8=Q Rxf8 88. Qxf8+ Kc7 89. g5 Kc6 90. g6 Kb6 91. g7 Kb5 92. g8=Q
Kb6 93. Qb4+ Kc7 94. Qc5+ Kd7 95. Qgc8# 1-0
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.05"]
[Round "2"]
[White "Stockfish-9_180131"]
[Black "Stockfish_18020517"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "65"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4
f6 21. Be3 Kg7 22. Rad1 Qe6 23. hxg5 Qf7 24. gxf6+ Bxf6 25. Rd6 Kg8 26. Bd4
b5 27. Qd1 Bxd4 28. Qxd4 Qg7 29. Qh4 Qg4 30. Qh6 Qg7 31. Qh4 Qg4 32. Qh6
Qg7 33. Qh4 {3-fold repetition} 1/2-1/2
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.05"]
[Round "3"]
[White "Stockfish_18020517"]
[Black "Stockfish-9_180131"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "132"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3 Kg7 22. Rad1 Qe6 23. hxg5 Qf7 24. Bd4 Bf5 25. g4 b5 26. Qa5
Be6 27. Qc7 Nd7 28. Qxc6 Ne5 29. gxf6+ Bxf6 30. Bxe5 Bxe5 31. Qc5 Bf6 32.
Bxa8 Bxg4 33. Rd4 Qg6 34. Be4 Bf5+ 35. Kf1 Bxd4 36. Qxd4+ Qf6 37. Qxa7+ Rf7
38. Qd4 Qxd4 39. cxd4 Bxe4 40. Rxe4 Ra7 41. Re2 Ra3 42. Rb2 Kg6 43. Rxb5
Rxa2 44. Rd5 h5 45. Rd8 h4 46. d5 h3 47. Rg8+ Kh5 48. Rh8+ Kg4 49. Rg8+ Kf4
50. Rh8 Ra1+ 51. Ke2 Ra2+ 52. Kd3 Ra6 53. Kd4 Kg4 54. Ke3 Ra3+ 55. Kd4 Ra2
56. f3+ Kg3 57. Ke3 Ra3+ 58. Ke4 Ra1 59. Rg8+ Kf2 60. Rh8 Kg3 61. d6 Rd1
62. Rg8+ Kf2 63. Rh8 Kg2 64. Rg8+ Kf2 65. Rh8 Kg2 66. Rg8+ Kf2 {3-fold
repetition} 1/2-1/2
[Event "Stockfish-9 vs A0. Game 99, 21.Be3."]
[Site "Open Source Land"]
[Date "2018.02.05"]
[Round "4"]
[White "Stockfish-9_180131"]
[Black "Stockfish_18020517"]
[Result "1/2-1/2"]
[ECO "E17"]
[PlyCount "129"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3 Kg7 22. Rad1 Qe6 23. Bd4 Qf7 24. hxg5 Bf5 25. g4 b5 26. Qa5
Be6 27. Qc7 Nd7 28. Qxc6 Ne5 29. Qe4 Bxg4 30. Rb1 Rae8 31. Rxb5 Kg8 32.
gxf6 Bxf6 33. Rxe5 Bd7 34. Rxe8 Rxe8 35. Qb1 Rxe1+ 36. Qxe1 Bxd4 37. cxd4
Qxa2 38. d5 Qc2 39. Be4 Qa4 40. f3 Qd4+ 41. Kf1 Kf7 42. Bxh7 Bh3+ 43. Ke2
Qxd5 44. Qa1 a5 45. Be4 Qc5 46. Qh8 Qc4+ 47. Kd1 Qb3+ 48. Kc1 Qe3+ 49. Kb1
Qb3+ 50. Ka1 Qa3+ 51. Kb1 Be6 52. Qh7+ Kf6 53. Qh8+ Kf7 54. Kc2 Qc5+ 55.
Kb2 a4 56. Qh7+ Kf6 57. Qh8+ Kf7 58. Qh7+ Kf6 59. Qh6+ Ke7 60. Qh4+ Kd7 61.
Qh7+ Kd6 62. Qh2+ Kd7 63. Qh7+ Kd6 64. Qh2+ Kd7 65. Qh7+ {3-fold
repetition} 1/2-1/2
.....
Tournament Conditions:
Competition Mode: LTC Match. Time control: 30/120' + 30/60' repeating.
Engine Threads: 1 core
Pondering: Off
Tournament held in 2018, between January 31 and February 05.
Start Position:
[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "Pomar, Polugaevsky, 8...c6 9.cxd5 Nxd5 10.Nf5 Nc7 11.e4"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3
Chess engines:
Sugar-xpro-220118. Author: Marco Zerbinati & Sergei A. K.
Gull 3.1 jv. Author: Vadim Demichev.
Booot 6.2. Author: Alex Morozov.
[ECO "E17"]
[Opening "Queen's Indian"]
[Variation "Pomar, Polugaevsky, 8...c6 9.cxd5 Nxd5 10.Nf5 Nc7 11.e4"]
1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8.
Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14.
Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1? Kxh6 20.
h4 f6 21. Be3
Chess engines:
Sugar-xpro-220118. Author: Marco Zerbinati & Sergei A. K.
Gull 3.1 jv. Author: Vadim Demichev.
Booot 6.2. Author: Alex Morozov.
Antonio Maravi.
...........................................
Notas:
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