Author: Martin Giepmans
Date: 15:48:39 04/01/02
Go up one level in this thread
On April 01, 2002 at 17:51:15, Ed Schröder wrote:
>[d]8/7N/1k2pp2/3P4/8/8/2r5/5K1R w - - 0 1
>
>Solution:
>
>1. dxe6 Rc1+ 2. Kf2 Rxh1 3. e7 Rh2+ 4. Kf3 Rh3+ 5. Kf4 Rh4+ 6. Kf5 Rh5+
>7. Kxf6 Rh6+ 8. Kf5 Rh5+ 9. Kf4 Rh4+ 10. Kf3 Rh3+ 11. Ke2 Rh2+ 12. Kd3
>Rh3+ 13. Kd4 Rh4+ 14. Kd5 Rh5+ 15. Kd6 Rh6+ 16. Nf6 Rxf6+ 17. Kd5 Rf5+
>18. Kd4 Rf4+ 19. Ke3 Rf1 20. Ke2 1-0
>
>1.dxe6 is easy, I assume every chess program will find it instantly.
>
>Difficult to find is 2.Kf2!!
>
>And that's the hard challenge for your favorite engine.
>
>Ed
My Spider shows Kf2 in the PV after 42 seconds (AMD 1200, no TB):
13 00:00:42 + 1.18 D5xE6 C2-C1 F1-F2 C1xH1 E6-E7 H1-H2 F2-F3 H2-H3 F3-F4
H3-H4 F4-F5 H4-H5 F5xF6 H5-H6 F6-F5 H6-H5 H7-G5 H5-H8
G5-F7 H8-G8 F5-E5
Martin
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