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Subject: Re: Mate in 24?

Author: Mike Byrne

Date: 16:49:00 10/03/04

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On October 03, 2004 at 19:39:39, David Dahlem wrote:

>[D]8/1k6/3KN3/8/2p5/2N5/8/8 w - - 0 1
>
>Could someone check this position with egtb to verify if this proposed solution
>is correct?
>
>1. Kc5 Ka7 2. Kc6 Ka6 3. Nf4 Ka7 4. Kc7 Ka6 5.Nfd5 Ka5 6.Kd6 Ka6 7.Kc6 Ka5 8.Kc5
>Ka6 9.Ne7 Kb7 10.Kd6 Kb8 11.Kd7 Ka8 12.Kc7 Ka7 13.Kc6 Ka6 14.Nc8 Ka5 15.Kc5 Ka6
>16.Nd6 Ka5 17.Nb7+ Ka6 18.Kc6 Ka7 19.Nc5 Kb8 20.Kd7 Ka7 21.Kc7 Ka8 22.Nb5 c3
>23.Nd7 c2 24.Nb6#
>
>Can any engine find this without tablebases?
>
>Regards
>Dave

White(1): 8/1k6/3KN3/8/2p5/2N5/8/8 w - - 0 1
1. Kc5! Ka7! 2. Kc6! Ka6! 3. Nc7+ Ka5 4. N7d5! Ka6 5. Kc7 Ka5! 6.
Kd7 Ka6 7. Kc6! Ka5! 8. Kc5! Ka6 9. Ne7! Kb7! 10. Kd6! Kb8! 11. Kd7!
Ka8! 12. Kc7! Ka7 13. Nc8+ Ka6! 14. Kc6! Ka5 15. Kc5! Ka6 16. Nd6!
Ka5! 17. Nb7+! Ka6 18. Kc6! Ka7 19. Nc5! Kb8! 20. Kd7! Ka7 21. Kc7!
Ka8 22. Nb5! c3 23. Nd7 c2 24. Nb6#

The exclamation points are best single move to either quickest mate or to hold
off mate.



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