Author: Heiner Marxen
Date: 20:22:14 04/20/01
Go up one level in this thread
On April 20, 2001 at 10:06:37, Paul wrote:
>On April 20, 2001 at 09:31:06, leonid wrote:
>
>>Hi!
>>
>>If you would like to solve one mate then ask your program to do this for you.
>>This time it will respond with pleasure and grace.
>>
>>[D]R5NR/npkq4/3pQ1np/1Ppb1N1P/N1P1P2b/2BP4/2K5/1r2q3 w - -
>>
>>Please indicate your result.
>>
>>Thanks,
>>Leonid.
>
>Hi Leonid,
>
>This one's too easy :) ... an instantaneous mate in 8:
>
>00:00 WM8 06 Qxd7+ Kxd7 Nb6+ Kc7 Nxd5+ Kd7 Ndf6+ Bxf6 Nxf6+ Kc7 Rh7+ Ne7 Rxe7+
>Kb6 Nd5#
Hi Paul,
Chest confirms that Qxd7+ is the only key move for this mate in 8.
Here is a solution tree:
Qxd7+ Kxd7 Nf6+ Bxf6 Nb6+ Kc7 Nxd5+ Kd7 Nxf6+ Kc7 Nd5+ Kd7 Rh7+ Ke6 Nc7#
Ne7 Rxe7#
Ke6 Rae8+ Kf7 Rh7#
Ne7 Rxe7#
Ke6 cxd5+ Kf7 Nxh6+ Ke7 Rhe8#
Kg7 Rag8#
Kc7 Rh7+ Bf7 Rxf7+ Ne7 Rxe7#
Ne7 Rxe7#
Ke6 cxd5+ Kf7 Rh7#
Done on a K7/600 in 6.06 seconds. Yes, that was easy ;-)
>I don't measure fractions of seconds, so can't be more specific. I've made
>progress in finding my hashtable bug (have found the offending variation), but
>am not quite there yet, so debug, debug! :)
Good luck!
Heiner
>Greetings,
>Paul
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