Author: Christophe Theron
Date: 17:53:15 10/20/03
Go up one level in this thread
On October 20, 2003 at 16:44:03, Ed Schröder wrote:
>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
Bad and good news. The good news is that Rebel will be a little stronger when
you fix this.
Christophe
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.