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Syzygy and draw by repetition
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Jon Dart



Joined: 10 Mar 2006
Posts: 3352
Location: http://www.arasanchess.org

PostPost subject: Syzygy and draw by repetition    Posted: Fri Jul 22, 2016 4:41 pm Reply to topic Reply with quote

Following is a FICS game Arasan drew, despite getting mate scores from the TBs (Syzygy, 5-man). Apparently Komodo has a similar issue because it shows a mate score in analysis mode even after the last move 90. Qd5+. (This position is a Black win: Black can avoid repetition).


[Event "freechess.org"]
[Site "freechess.org"]
[Date "2016.07.19"]
[Round "?"]
[White "GnuCheese"]
[Black "Arasan 19.0.1"]
[Result "1/2-1/2"]
[ECO "B45"]
[WhiteElo "2547"]
[BlackElo "2659"]
[PlyCount "179"]
[EventDate "2016.??.??"]
[TimeControl "900+5"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4.
Nxd4 e6 5. Nc3 d6 6. Be3 a6 7. g4 Bd7 8. Be2 Na5 9. O-O h6 10. Qd2 Rc8 11. f4
Nc4 12. Bxc4 Rxc4 13. g5 b5 14. a3 Ne7 15. gxh6 gxh6 16. Rf3 Rg8+ 17. Rg3 Qc7
18. Rb1 Rxg3+ 19. hxg3 Bg7 20. Rf1 Ng8 21. f5 Be5 22. fxe6 Bxe6 23. Qd3 Nf6 24.
Bf2 Qc8 25. Nce2 Bg4 26. Nc3 Bh3 27. Rd1 Ng4 28. Nce2 Bxd4 29. Bxd4 Rxc2 30.
Rd2 Rc4 31. Nc3 Qe6 32. Rc2 Ne5 33. Bxe5 dxe5 34. Nd5 Rc6 35. a4 Kf8 36. axb5
axb5 37. Rf2 Qg6 38. Qe3 Be6 39. Nf6 Bg4 40. Nd5 Ra6 41. b4 Ra1+ 42. Rf1 Qa6
43. Qf2 Rxf1+ 44. Kxf1 Bh3+ 45. Kg1 Kg7 46. Kh2 Bd7 47. Ne7 Qd6 48. Nf5+ Bxf5
49. Qxf5 Qf6 50. Qh5 Qf2+ 51. Kh3 Qd4 52. Qf5 Kf8 53. Qc8+ Ke7 54. Qf5 Qd7 55.
g4 Qd4 56. Kg3 Kf8 57. Qc8+ Kg7 58. Qe8 Qxb4 59. Qxe5+ Kh7 60. Qf4 Qc3+ 61. Kh2
Qc4 62. Qf5+ Kg8 63. Qf4 b4 64. Qxh6 Qb5 65. Qd6 Qe2+ 66. Kg3 Qe3+ 67. Kh4 Qxe4
68. Qb6 Kg7 69. Qa5 Qe1+ 70. Kh3 Qe3+ 71. Kh4 b3 72. Qa1+ f6 73. Qa8 Qf2+ 74.
Kh3 b2 75. Qe4 Kh6 76. g5+ fxg5 77. Qe6+ Kg7 78. Qe7+ Kg6 79. Qxg5+ Kf7 80.
Qd5+ Kf8 81. Qd8+ Kf7 82. Qd5+ Kg7 83. Qg5+ Kh7 84. Qh5+ Kg7 85. Qg5+ Kh7 86.
Qh5+ Kg8 87. Qg5+ Kh8 88. Qh6+ Kg8 89. Qg5+ Kf7 90. Qd5+ 1/2-1/2
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Subject Author Date/Time
Syzygy and draw by repetition Jon Dart Fri Jul 22, 2016 4:41 pm
      Re: Syzygy and draw by repetition Robert Hyatt Fri Jul 22, 2016 5:18 pm
            Re: Syzygy and draw by repetition Jon Dart Fri Jul 22, 2016 5:43 pm
                  Re: Syzygy and draw by repetition Ronald de Man Fri Jul 22, 2016 8:50 pm
                        Re: Syzygy and draw by repetition Robert Hyatt Fri Jul 22, 2016 9:56 pm
                              Re: Syzygy and draw by repetition Ronald de Man Sat Jul 23, 2016 12:15 am
                  Re: Syzygy and draw by repetition Basil Falcinelli Sat Jul 23, 2016 10:05 am
                        Re: Syzygy and draw by repetition Jon Dart Sat Jul 23, 2016 10:16 pm
                              Re: Syzygy and draw by repetition Basil Falcinelli Sun Jul 24, 2016 3:34 pm
            Re: Syzygy and draw by repetition Ronald de Man Fri Jul 22, 2016 8:42 pm
                  Re: Syzygy and draw by repetition Robert Hyatt Fri Jul 22, 2016 10:00 pm
                        Re: Syzygy and draw by repetition Greg Simpson Fri Jul 22, 2016 11:19 pm
                              Re: Syzygy and draw by repetition Dann Corbit Fri Jul 22, 2016 11:36 pm
                              Re: Syzygy and draw by repetition Robert Hyatt Fri Jul 22, 2016 11:49 pm
                              Re: Syzygy and draw by repetition J. Wesley Cleveland Sat Jul 23, 2016 12:08 am
                                    Re: Syzygy and draw by repetition Ronald de Man Sat Jul 23, 2016 12:24 am
                                    Re: Syzygy and draw by repetition Kevin Hearn Sat Jul 23, 2016 12:27 am
                                          Re: Syzygy and draw by repetition Arpad Rusz Sat Jul 23, 2016 8:59 am
                                          Re: Syzygy and draw by repetition H.G.Muller Sat Jul 23, 2016 10:19 am
                                                Re: Syzygy and draw by repetition Ronald de Man Sat Jul 23, 2016 11:16 am
                                                      Re: Syzygy and draw by repetition H.G.Muller Sat Jul 23, 2016 12:09 pm
                                                            Re: Syzygy and draw by repetition Ronald de Man Sat Jul 23, 2016 12:23 pm
                                                                  Re: Syzygy and draw by repetition H.G.Muller Sat Jul 23, 2016 12:49 pm
                                                                        Re: Syzygy and draw by repetition Ronald de Man Sat Jul 23, 2016 1:49 pm
                  Re: Syzygy and draw by repetition Jon Dart Fri Jul 22, 2016 10:15 pm
                        Re: Syzygy and draw by repetition Robert Hyatt Fri Jul 22, 2016 11:48 pm
      Re: Syzygy and draw by repetition J. Wesley Cleveland Sun Jul 24, 2016 1:30 am
            Re: Syzygy and draw by repetition Greg Simpson Sun Jul 24, 2016 2:21 am
            Re: Syzygy and draw by repetition Ronald de Man Sun Jul 24, 2016 2:43 am
                  Re: Syzygy and draw by repetition Greg Simpson Sun Jul 24, 2016 3:00 am
      Re: Syzygy and draw by repetition Jon Dart Sun Jul 24, 2016 9:52 pm
            Re: Syzygy and draw by repetition Ronald de Man Sun Jul 24, 2016 10:12 pm
                  Re: Syzygy and draw by repetition Jon Dart Sun Jul 24, 2016 11:23 pm
                  Re: Syzygy and draw by repetition Michel Van den Bergh Mon Jul 25, 2016 6:06 am
                        Re: Syzygy and draw by repetition Kevin Hearn Mon Jul 25, 2016 7:26 am
                              Re: Syzygy and draw by repetition Michel Van den Bergh Mon Jul 25, 2016 9:21 am
                                    Re: Syzygy and draw by repetition J. Wesley Cleveland Mon Jul 25, 2016 5:33 pm
                                          Re: Syzygy and draw by repetition Kevin Hearn Mon Jul 25, 2016 6:58 pm
                                          Re: Syzygy and draw by repetition Greg Simpson Mon Jul 25, 2016 7:09 pm
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