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Subject: Re: Forced mate so solve...

Author: Hermano Ecuadoriano

Date: 11:04:11 02/05/01

Go up one level in this thread


On February 05, 2001 at 13:45:13, Hermano Ecuadoriano wrote:

>On February 05, 2001 at 08:07:35, Christophe Theron wrote:
>
>>On February 05, 2001 at 07:23:58, leonid wrote:
>>
>>>Hi!
>>>
>>>If you like to solve forced mate position full of "depleted uranium"...
>>>
>>>[D]NKBN4/QRQ3rR/2Qb2r1/N1b1nb2/B2nbbbB/1RNqqqq1/8/2N2k2 b - -
>>>
>>>Please, indicate your result.
>>>
>>>Thanks,
>>>Leonid.
>>
>>
>>Chess Tiger 14 (experimental version) finds:
>>* a mate in 11 in 6.21s (Bxa7+...)
>>* a mate in 9 in 15.27s (still Bxa7+...)
>>on a K6-2 450 with 6Mb hash tables.
>
>It is hard to resist posting that Tiger 13 found mate in 8.
>
>Tiger 13 PII-300 48M hash
>snipped from the Statistics window:
>
>00:00:00.3	37.60	6	42729	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6 Bxc7+ Ka8
>Bxc6+ Nxc6 Qxc6+
>00:00:01.7	35.98	6	105627	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6 Bxc7+
>Ka8 Bxc6+ Nxc6 Qxc6+ Rbb7
>00:00:02.5	35.98	7	211978	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6 Bxc7+
>Ka8 Bxc6+
>00:00:03.5	36.88	8	339300	Bxa7+
>00:00:09.8	 Mate in 9	8	1020636	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6
>Bxc7+ Ka8 Bxc6+ Nb7 Bxb7+ Bxb7
>00:00:21.1	 Mate in 8	9	2221209	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6
>Bxc7+ Ka8 Bxc6+ Nb7 Bxb7+ Bxb7
>00:00:47.9	 Mate in 8	10	4865000	Bxa7+ Rxa7 Nexc6+ Ndxc6 Bxc7+ Nxc7 Nxc6+ Bxc6
>Bxc7+ Ka8 Bxc6+ Nb7 Bxb7+ Bxb7

I just learned that it is not counting the mating move: it is not mate in 8.
It is mate in 9. Probably this is something already known.

>
>
>>
>>
>>    Christophe



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