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Subject: Re: Endgame easy test position

Author: Uri Blass

Date: 07:53:39 09/18/01

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On September 18, 2001 at 10:45:15, José Carlos wrote:

>On September 18, 2001 at 09:56:32, Ed Schröder wrote:
>
>>On September 18, 2001 at 09:40:26, Eduard Nemeth wrote:
>>
>>>First the game:
>>>
>>>[Event "TCh-YUG Herceg Novi YUG"]
>>>[Site "?"]
>>>[Date "2001.??.??"]
>>>[Round "?"]
>>>[White "Vukic,M"]
>>>[Black "Marinkovic,I"]
>>>[WhiteElo "2470"]
>>>[BlackElo "2440"]
>>>[ECO "A30"]
>>>[Result "1-0"]
>>>
>>>1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O g6 5. c4 c5 6. Nc3
>>>Bg7 7. d4 cxd4 8. Qxd4 d6 9. Be3 Nbd7 10. Rac1 Rc8 11. b3
>>>O-O 12. Qd2 Nc5 13. Rfd1 Nce4 14. Nxe4 Nxe4 15. Qe1 Qd7
>>>16. Nd4 Nf6 17. Nf3 Ne4 18. Qb4 Nc3 19. Rd2 Ne4 20. Rd3 Nc5
>>>21. Rdd1 Rfd8 22. Ne1 h5 23. Bxc5 Rxc5 24. Nd3 Bxg2
>>>25. Kxg2 Qb7+ 26. f3 Rc7 27. Nf2 Rdc8 28. Qd2 b5 29. cxb5
>>>Qxb5 30. Kf1 Bc3 31. Qd3 Qa5 32. Rc2 Bf6 33. Rdc1 Rxc2
>>>34. Rxc2 Rxc2 35. Qxc2 d5 36. e3 Kg7 37. Nd3 e6 38. Ke2 Qa3
>>>39. f4 Kg8 40. h3 Kg7 41. Kf3 Qd6 42. g4 hxg4+ 43. hxg4 e5
>>>44. fxe5 Bxe5 45. Nxe5 Qxe5 46. Qc5 Qf6+ 47. Kg3 Qe5+
>>>48. Kh3 a6 49. Qd4 Kf6 50. b4 Ke6 51. a4 Qc7 52. g5 Qc2
>>>53. Qf6+ Kd7 54. Qxf7+ Kd6 55. Qf6+ Kd7 56. Qd4 Ke6 57. Kg3
>>>Qb1 58. Qb6+ Ke7 59. Qb7+ Kf8 60. Qxd5 Qxb4 61. Qd8+ Kg7
>>>62. Qd4+ 1-0
>>>
>>>Position after move 61. Kg7:
>>>
>>>[D]3Q4/6k1/p5p1/6P1/Pq6/4P1K1/8/8 w - -
>>>
>>>After 62. Qf6+ is the win not easy. But after 62. Qd4+ is the game easy to win,
>>>and the game end! For any programs ist the move Qd4+ not easy to find.
>>>
>>>:-(
>>
>>
>>I am sure all Rebel programs find this instantly. A simple chess rule says:
>>"one pawn up in a pawn ending wins".
>>
>>Ed
>
>  Are you serious Ed? In this position, it's a clear win, but in most pawn
>endgames, you have to calculate a lot, or otherwise know some rules (which names
>I don't know how to translate from spanish to english) to figure if it's a win
>or not.
>
>  Maybe you were simply joking, and I didn't catch it... :)

In most pawn endgames one pawn advantage is enough to win the game.
It is not something that always happens but computer can safely evaluate
+2 for positions with one pawn advnatage if they do not see a positional
advantage for the side that has less pawns.

Uri



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