Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Hard K+P ending position

Author: Jeremiah Penery

Date: 21:38:50 06/29/03

Go up one level in this thread


On June 30, 2003 at 00:36:08, Jeremiah Penery wrote:

>On June 29, 2003 at 18:16:58, Mike Byrne wrote:
>
>>On June 29, 2003 at 15:30:03, Jeremiah Penery wrote:
>>
>>>[D]8/5p1p/8/6k1/8/6P1/5PP1/7K w - -
>>>
>>>This position was part of a test posted quite some time ago.  All the other
>>>positions were solved without huge difficulty by programs, but this one was not.
>>> I've seen a couple of times where programs come up with the first move, but
>>>they don't really know what's going on.
>>>
>>>I want to see a program get the correct line with a decent score (more than +1
>>>or so).
>>>
>>>The line is 1. Kh2 f6 2. Kh1! f5 3. Kg1 Kf6 4. Kf1 Ke5 5. Ke1 Kd5 6. Kd1 Ke5 7.
>>>Kc2! Kd4 8. Kd2 Ke4 9. Ke2 h6 10. Kf1! Ke5 11. Kg1 Kf6 12. Kh2 Kg6 13. Kh3, and
>>>now the win is not hard to find.
>>
>>Crafty v19.3 (2 cpus)
>>
>>               31->   3:13   1.02   1. Kh2 f6 2. Kh1 f5 3. Kg1 Kf6 4. Kf1
>>                                    Ke5 5. Ke1 Kd5 6. Kd1 Ke5 7. Kc2 Kd4
>>                                    8. Kd2 h6 9. Kc2 Kc4 10. f3 Kd5 11.
>>                                    Kd2 Ke5 12. Ke3 h5 13. f4+ Ke6 14.
>>                                    Kd4 Kd6 15. Kd3 Kd5 16. Ke3 Ke6
>
>Even here, Crafty doesn't really know what's going on.
>
>>Playing from the postion at G/25, it see mate on the 9th move.
>>
>>1. Kh2 f6 2. Kh1 f5 3. Kg1 Kf6 4. Kf1 Ke5 5. Ke1
>>Kd5 6. Kd1 Ke5 7. Kc2 Kd4 8. Kd2 Ke4 9. Ke2  1-0
>
>Sure, only because it plays the horrible 2. ...f5.

Sorry, I shouldn't post so late at night. :/  That line is correct.



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.