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

Author: Howard Exner

Date: 14:07:28 09/09/99

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On September 09, 1999 at 13:03:13, Hans Havermann wrote:

>On September 09, 1999 at 07:29:34, Howard Exner wrote:
>
>>>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
>
>17. … dc 18. Kb2 cb=Q+ 19. Rxb1 ab=Q+ 20. Kxb1 will delay the inevitable.

These types of positions really highlight the thinking between man
and machine. Computers just calculate from the starting position while we
at times work backwards to "look deeply". The only way for white to win
is the eventual Qa2 (threatening Qxb3). So all that's left is to manoevre the
white rooks and king into a winning position before the Qa2 move. It's also
interesting how humans would not spend any time considering  captures of the
rooks by the black pawns.



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