Author: Steffen Jakob
Date: 04:01:50 12/29/01
Go up one level in this thread
On December 29, 2001 at 06:38:51, Rafael Andrist wrote:
>On December 29, 2001 at 06:20:00, Steffen Jakob wrote:
>
>>Hi Rafael!
>>
>>On December 29, 2001 at 05:50:19, Rafael Andrist wrote:
>>
>>>On December 29, 2001 at 04:08:22, Steffen Jakob wrote:
>>>
>>>>On December 28, 2001 at 15:27:43, Rafael Andrist wrote:
>>>>
>>>>>On December 28, 2001 at 09:10:27, Steffen Jakob wrote:
>>>>>
>>>>>>Hi!
>>>>>>
>>>>>>Today Hossa played a blitz game with Tinker at ICC where a KBPKP endgame was on
>>>>>>the board:
>>>>>>
>>>>>>8/8/p4b1P/3K4/8/8/8/1k6 b
>>>>>>
>>>>>>Hossa evaluates this as a win for black, because the black pawn has a black
>>>>>>promotion square and there is no white pawn on the b file in front of the black
>>>>>>pawn. Unfortunately this position is a draw. Can you define a rule for such a
>>>>>>position class ("search will do it" doesn't count;
>>>>>
>>>>>my prog needs 7 ply and a bit less than a second to see the draw. Can you please
>>>>>post the game + time?
>>>>
>>>>I no longer have the time which was spent for each move but only the game score:
>>>>
>>>>[Event "ICC 3 1"]
>>>>[Site "Internet Chess Club"]
>>>>[Date "2001.12.28"]
>>>>[Round "-"]
>>>>[White "Tinker"]
>>>>[Black "Hossa"]
>>>>[Result "1/2-1/2"]
>>>>[ICCResult "Game drawn by repetition"]
>>>>[WhiteElo "2560"]
>>>>[BlackElo "2588"]
>>>>[Opening "French: Tarrasch, open variation"]
>>>>[ECO "C07"]
>>>>[NIC "FR.19"]
>>>>[Time "08:15:24"]
>>>>[TimeControl "180+1"]
>>>>
>>>>1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. O-O a6
>>>>8. Ne4 Qc7 9. Qxd4 Nc6 10. Qc3 e5 11. Bd5 Nf6 12. Nxf6+ gxf6 13. Bd2 Be6 14.
>>>>Be4 O-O-O 15. Qe3 h5 16. Bc3 Be7 17. a3 Rhg8 18. Bh7 Rh8 19. Bd3 Bf8 20.
>>>>Rfe1 Bh6 21. Qe4 Ne7 22. Nxe5 fxe5 23. Bxe5 Qc6 24. Bxh8 Qxe4 25. Rxe4 Rxh8
>>>>26. Rb1 Nc6 27. Rbe1 Rd8 28. Be2 Bg7 29. b3 Rd2 30. c4 Nd4 31. Bd1 Bf8 32.
>>>>b4 f5 33. R4e3 Bh6 34. Rh3 Bxc4 35. Bxh5 Rb2 36. Bd1 Bg5 37. Rh8+ Kd7 38.
>>>>Rh7+ Kc6 39. h4 Bf4 40. Rh8 Bc7 41. Bh5 Be6 42. Rh6 Bd6 43. Rc1+ Kb6 44. Re1
>>>>Kc6 45. Rc1+ Kb6 46. Rg6 Bb8 47. Rd1 Be5 48. Rxd4 Bxd4 49. Rxe6+ Kb5 50.
>>>>Be8+ Kc4 51. Bf7 Kb5 52. Kh2 Ka4 53. f4 Kxa3 54. Bg6 Bf2 55. h5 Rxb4 56.
>>>>Bxf5 Rxf4 57. g4 Kb2 58. h6 Bd4 59. Re1 b5 60. Rb1+ Ka2 61. Rh1 b4 62. Kg3
>>>>Rxf5 63. gxf5 b3 64. f6 Bxf6 65. Kf4 b2 66. Ke4 b1=Q+ 67. Rxb1 Kxb1 68. Kd5
>>>>a5 69. Kc5 Bc3 70. h7 Ka2 71. Kc4 Kb2 72. Kb5 Bh8 73. Ka4 Ka1 74. Ka3 Bg7
>>>>75. Kb3 Be5 76. Ka4 Bh8 77. Ka3 Bc3 78. Kb3 Bb2 79. Ka4 Bh8 80. Ka3
>>>>{Game drawn by repetition}
>>>>1/2-1/2
>>>>
>>>>Greetings,
>>>>Steffen.
>>>
>>>I went back to move Nr. 65 and saw that even there, the position is already a
>>>draw.
>>>
>>>[D]8/8/p4b1P/8/5K2/1p6/k7/7R b - - 0 65
>>
>>I think so too, but are you sure? I showed the position above because my point
>>was to emphasize the static evaluation problem. 64. f6?? was a bad move. 64. Kg4
>>and then Kg5 looks much better/winning. I think Hossa played f6?? because then
>>the wrong KBPKP evaluation was active in some lines.
>
>from the info you gave I thought Hossa played black. If White can win then
>64.f6?? surely gives the win away. Hossa drew a lost endgame, what do you want
>more?
Oops, I guess I shouldn't post in the morning after I went to bed too late :)
Hmmm, nevertheless I like my explanation; maybe Hossa would have played f6, too!
;-)
Greetings,
Steffen.
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