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Subject: Re: Here's two difficult positions for your program

Author: Howard Exner

Date: 04:29:34 09/09/99

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On September 09, 1999 at 02:22:03, Jouni Uski wrote:

>Both claimed virtually impossible for programs (couple of years ago):
>
>1. 8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - white wins

1. Kd1 Kb6 2. Rg2 Kc6 3. Re2 Kb6 4. Rg1 Kc6 5. Rgg2 Kb6 6. Ke1 Ka6 7. Kf2
Kb6 8. Re1 Ka6 9. Rc1 Kb6 10. Ke1 Ka6 11. Re2 Kb6 12. Kd1 Ka6 13. Re1 Kb6
14. Rc2 Ka6 15. Kc1 Kb6 16. Qa2 bxa2 17. b4 a1=Q 18. Rb2 Kb5 19. Rd1 Kb6
20. b5 Kc7 21. b6

>
>2. 1R6/7K/8/5P2/8/8/3n2kp/8 w - - white draws

1. Rb1 Nxb1 2. f6 h1=Q+ 3. Kg7 Kf3 4. f7 Qg1+ 5. Kh8 Qh2+ 6. Kg8 Qg3+ 7.
Kh8 Qe5+ 8. Kg8 Qg5+ 9. Kh8 Qf6+ 10. Kg8 Qe6 11. Kh8
>
>I don't know solutions myself yet...

Try these as possible solutions. I doubt if computers will be much help here.
Note on the first position, if at any time black captures a white rook then
white will be able to break through with pawn advances. Where did you find this
first one?

• Re: Here's two difficult positions for your program Hans Havermann 10:03:13 09/09/99
  • Re: Here's two difficult positions for your program Howard Exner 14:07:28 09/09/99
    • Re: Here's two difficult positions for your program Mark Young 15:10:29 09/09/99

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