Author: Ed Schröder
Date: 13:44:03 10/20/03
Go up one level in this thread
On October 20, 2003 at 14:04:47, Christophe Theron wrote: >On October 20, 2003 at 03:54:42, Ed Schröder wrote: > >>On October 19, 2003 at 18:27:35, Christophe Theron wrote: >> >>>On October 19, 2003 at 16:40:19, Eelco de Groot wrote: >>> >>>>On October 19, 2003 at 15:27:49, Ernst Walet wrote: >>>> >>>>>On October 19, 2003 at 15:15:37, Theo van der Storm wrote: >>>>> >>>>>>Dutch games link(nt) http://www.computerschaak.nl/pgn_base/docc03.pgn >>>>> >>>>>As far as I recall, in the game Diep-Rebel, the last move in the PGN was not >>>>>played. Rebel played a2, completely missing the obvious, and Jeroen offered >>>>>draw right away. >>>>> >>>>>Ernst. >>>>[Event "23rd DOCC"] >>>>[Site "Leiden NED"] >>>>[Date "19/10/2003"] >>>>[Round "06"] >>>>[White "Rebel"] >>>>[Black "Diep"] >>>>[Result "1/2-1/2"] >>>> >>>>1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. d5 Ne5 5. Qd4 Ng6 6. e4 e5 7. Qxc4 Bd6 8. Qa4+ >>>>Bd7 9. Bb5 >>>>Nf6 10. Nf3 O-O 11. Bxd7 Qxd7 12. Qxd7 Nxd7 13. Be3 Nf4 14. Bxf4 exf4 15. Nd4 >>>>Be5 16. O-O-O >>>>Rae8 17. Rhe1 a6 18. Kc2 g6 19. Nce2 Re7 20. f3 Rfe8 21. Rg1 Bd6 22. Rgf1 h5 23. >>>>Nc1 f5 >>>>24. exf5 Nb6 25. Ne6 gxf5 26. Kb1 Nc4 27. Rh1 Ne3 28. Rd2 c6 29. Nd3 Nxd5 30. >>>>Nec5 b6 >>>>31. Na4 Re2 32. Kc1 Kh7 33. Rhd1 R2e6 34. Kb1 Bf8 35. Rg1 Bg7 36. Rgd1 a5 37. >>>>Kc1 Bd4 >>>>38. Kb1 c5 39. Nc1 Ne3 40. Rh1 b5 41. Nc3 Nc4 42. Rc2 Bxc3 43. Rxc3 Rg6 44. Rg1 >>>>Nd2+ 45. Kc2 >>>>b4 46. Rd3 Nc4 47. Rd7+ Kh6 48. Kb3 Nb6 49. Rc7 c4+ 50. Kc2 Nd5 51. Rc5 Ne3+ 52. >>>>Kb1 a4 >>>>53. Ne2 Rxg2 54. Rc6+ Kg5 55. Rh1 h4 56. Nd4 a3 57. bxa3 bxa3 58. Ne6+ Rxe6 59. >>>>Rxe6 >>>>Nd5 60. Re8 Rb2+ 61. Kc1 Nb4 62. Rg1+ Kf6 63. Rgg8 Nxa2+ 64. Kd1 Nc3+ 65. Ke1 a2 >>>>66. Rgf8+ 1/2-1/2 >>>> >>>>Ouch! I think that is one for the chesscolumns, Ernst! Tien punten voor de >>>>blunderubriek! From your story, I take it that Diep played 65...a2?? here >>>> >>>>[D]4R1R1/8/5k2/5p2/2p2p1p/p1n2P2/1r5P/4K3 b - - 3 1 >>>> >>>>Rebel would also have played that... >>>> >>>>00:00:01.2 3,24 1 5 Rxh2 >>>>00:00:01.2 3,71 1 8 a2 >>>>00:00:01.2 3,72 1 21 Nd5 >>>>00:00:01.3 2,56 2 171 Nd5 Ra8 >>>>00:00:01.3 3,66 2 644 a2 Rgf8+ Kg6 Rg8+ Kf7 >>>>00:00:01.4 3,66 3 1694 a2 Rgf8+ Kg6 Rg8+ Kf7 >>>>00:00:01.6 3,66 4 4669 a2 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ >>>>00:00:01.7 3,66 5 11164 a2 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ >>>>00:00:01.9 3,66 6 27649 a2 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ >>>>00:00:02.5 3,66 7 101036 a2 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ >>>>00:00:04.3 3,66 8 326846 a2 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ Kg6 Rg8+ Kf7 Rgf8+ >>>>00:00:11.1 3,51 9 1801567 a2 Rgf8+ Kg6 Rg8+ Kf7 Ref8+ Ke6 Ra8 >>>>00:00:51.4 3,66 10 10858785 a2 Rgf8+ Kg7 Rg8+ Kf7 Rgf8+ Kg6 Ra8 >>>>00:02:21.3 3,66 11 31260296 a2 Rgf8+ Kg7 Rg8+ Kf7 Rgf8+ Kg7 Rg8+ Kf7 Rgf8+ >>> >>> >>> >>>This analysis is very strange. The line is obviously a quick draw by threefold >>>repetition. Rebel is usually very good at seeing very long check-check lines and >>>should have seen that a2 is an almost immediate draw. >>> >>>After a2, Chess Tiger sees the draw after a 5 plies search (that is to say >>>instantly). >>> >>>I have not tried with other chess programs but I am pretty sure that they all >>>see very quickly that a2 is just a draw... >>> >>> >>> >>> Christophe >> >> >>Thanks buddy, you just found a terrible bug that sneaked in since Century 4. >>Lucky Vincent :) >> >>Ed >I did not want to mention the word "bug" in my previous message, but that was >the idea. :) Your diplomatic skills have always been more than excellent :) >Now that you have fixed it, I guess Rebel wants to play Rb6 or Rb7? Unfortunately I haven't traced the bastard yet, it is something deep I am afraid :( Ed
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