domenica 10 giugno 2018

Why do engines fail to solve a 400 year old chess puzzle?

lunedì 16 aprile 2018

Stockfish Refuted One Of The Most Fantastic Puzzles Ever Seen!

Here is a refutation of a famous chess puzzle which was composed by a Russian chess composer Somov-Nasimovitch. This position in Forsyth-Edwards Notation (FEN) is : 7b/2R2Pq1/4b1B1/4P3/8/8/1PP2k2/K7 w - - 0 0
Analysis by Suren Aghabekyan

martedì 26 dicembre 2017

martedì 11 aprile 2017

Englund Gambit: Stockfish vs. Komodo (1-0)


15 minutes game

 [Event "Komodo vs Stockfish"] [Site "https://lichess.org/sWITcYcC"] [Date "2017.04.11"] [White "Stockfish 8"] [Black "komodo 10.1"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [PlyCount "155"] [Variant "Standard"] [TimeControl "-"] [ECO "A40"] [Opening "Englund Gambit Complex: Hartlaub-Charlick Gambit"] [Termination "Normal"] [Annotator "lichess.org"]

1. d4 e5 2. dxe5 d6 { A40 Englund Gambit Complex: Hartlaub-Charlick Gambit } 3. Nf3 Nc6 4. Bg5 f6 5. exf6 Nxf6 6. e4 Be7 7. Nc3 O-O 8. Be2 h6 9. Be3 Ng4 10. Bd2 Nd4 11. h3 Nxe2 12. Qxe2 Ne5 13. O-O-O Qe8 14. Nd4 Qf7 15. Nd5 Bd8 16. f4 Nc6 17. Nf3 a5 18. a3 Ne7 19. Nc3 b6 20. Nd4 c6 21. a4 d5 22. Kb1 dxe4 23. g4 Nd5 24. Nxe4 Bc7 25. f5 Re8 26. Rhe1 Bd7 27. Qc4 c5 28. Ne6 Bxe6 29. fxe6 Qxe6 30. Bxh6 Ne3 31. Qc3 Qxh6 32. Rxe3 Kh8 33. h4 Be5 34. Qd3 Qg6 35. Ree1 Bd4 36. Nxc5 Qxd3 37. Nxd3 Kg8 38. c3 Be3 39. Re2 Re4 40. Rde1 Rae8 41. Nf2 R4e7 42. Kc2 g6 43. h5 Kf7 44. Nd1 Bg5 45. Rxe7+ Bxe7 46. hxg6+ Kxg6 47. Re6+ Kf7 48. Rxb6 Bd8 49. Rb8 Re2+ 50. Kd3 Re1 51. Ne3 Bg5 52. Nc4 Rg1 53. Rb5 Rg3+ 54. Kc2 Bf6 55. Rxa5 Rxg4 56. Ra7+ Ke6 57. Ra6+ Kd7 58. Rxf6 Rxc4 59. b4 Ke7 60. Rb6 Kd7 61. a5 Kc7 62. Rf6 Re4 63. b5 Kb7 64. a6+ Ka7 65. Rf7+ Kb6 66. Rb7+ Kc5 67. Kb3 Re8 68. a7 Ra8 69. b6 Kd6 70. Rb8 Kc5 71. Rxa8 Kxb6 72. Rb8+ Kxa7 73. Rb5 Ka6 74. Kb4 Ka7 75. Ka5 Ka8 76. Kb6 Kb8 77. Rc5 Ka8 78. Rc8# { White wins by checkmate. } 1-0

Englund Gambit: Komodo vs. Stockfish (1/2-1/2)


15 minuti per tutta la partita.

[Event "Komodo vs Stockfish"] [Site "?"] [Date "2017.04.11"] [Round "1"] [White "komodo 10.1"] [Black "Stockfish 8"] [Result "1/2-1/2"] [TimeControl "15/0"]

1.d4 e5 2.dxe5 d6 3.Nf3 Nc6 4.Bg5 f6 5.exf6 Nxf6 6.e3 Be6 7.Bb5 Be7 8.Nd4 Bd7 9.Nc3 O-O 10.Bc4+ Kh8 11.Ne6 Bxe6 12.Bxe6 Ne5 13.O-O c6 14.Bf4 Qe8 15.Bh3 Nh5 16.Qd4 Ng6 17.g3 d5 18.Rae1 Qf7 19.Bg2 Rfe8 20.Ne2 Bf6 21.Qd2 Rad8 22.Nd4 Nf8 23.h4 Ne6 24.Nxe6 Rxe6 25.Bg5 Qe7 26.Qa5 b6 27.Qa4 Bxg5 28.hxg5 Qxg5 29.Qxa7 b5 30.Qc7 Rf8 31.a4 bxa4 32.Ra1 Qg4 33.Qa7 Qe2 34.Qc5 Kg8 35.e4 dxe4 36.Rae1 Qb5 37.Qxb5 cxb5 38.Bxe4 Rb6 39.Bd3 Nf6 40.Re5 Rfb8 41.Kg2 g6 42.Rfe1 Kf8 43.R1e2 Nd7 44.Re7 Nc5 45.Rxh7 Nxd3 46.cxd3 R6b7 47.Ree7 Rxe7 48.Rh8+ Kf7 49.Rxb8 Rd7 50.Rxb5 Rxd3 51.Kh3 Rf3 52.Rb7+ Kf6 53.Rb6+ Kg7 54.Kg2 Rd3 55.f4 a3 56.bxa3 Rxa3 57.Kh3 Ra4 58.Rd6 Kf7 59.Kh4 Kg7 60.Rb6 Rd4 61.Re6 Kf7 62.Re5 Kf6 63.Kh3 Rd1 64.Kg2 Kf7 65.g4 Rd6 66.Kf3 Kf6 67.Ra5 Rd3+ 68.Ke4 Rg3 69.g5+ Kf7 70.Ra7+ Kf8 71.Rc7 Rb3 72.Rd7 Rb4+ 73.Kf3 Rb3+ 74.Kg4 Rb4 75.Ra7 Rb1 76.Kh4 Rf1 77.Kg3 Rb1 78.Rd7 Rb3+ 79.Kg4 Rb4 80.Rd6 Kf7 81.Kf3 Kg7 82.Ra6 Rb1 83.Ra8 Rf1+ 84.Kg3 Rb1 85.Rc8 Kf7 86.Rc7+ Kf8 87.Kf3 Rb3+ 88.Ke4 Rb4+ 89.Ke5 Rb1 90.Kd4 Rb4+ 91.Rc4 Rb1 92.Kd5 Kf7 93.Rc7+ Kg8 94.Ke6 Rb6+ 95.Ke5 Rb5+ 96.Kd4 Rb1 97.Kd5 Kf8 98.Rd7 Rf1 99.Ke5 Rb1 100.Rc7 Rb5+ 101.Kd4 Rb4+ 102.Rc4 Rb1 103.Ke4 Rb3 104.Rc6 Rb4+ 105.Ke5 Kf7 106.Rc7+ Kf8 107.Rd7 Rb1 108.Rc7 {3 fold repetition. wtime 33046, btime 23597. wtime 33046, btime 23597} 1/2-1/2

venerdì 11 novembre 2016

sabato 15 ottobre 2016

Spanish: Open variation, 11....Nxf2 - Very good for Black !

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 O-O 11.Bc2 Nxf2 12.Rxf2 Bxf2+ 13.Kxf2 f6 14.exf6 Qxf6

Database: Big2011twic1142 (5,381,583 games)
Report: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 O-O 11.Bc2 Nxf2 ! 12.Rxf2 Bxf2+ 13.Kxf2 f6 14.exf6 Qxf6 (296 games)
ECO: C82p [Spanish: Open, Dilworth, 14.Kxf2]
Generated by Scid vs. PC 4.14, 2016.10.15


1. Statistics and History

1.1 Statistics

                   Games     1-0     =-=     0-1    Score
-----------------------------------------------------------
 All report games    298      81     100     117    43.9%
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