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Subject: Re: If you like to solve mate...

Author: Uri Blass

Date: 13:29:28 02/14/01

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On February 14, 2001 at 13:55:54, Jeremiah Penery wrote:

>On February 14, 2001 at 06:38:34, leonid wrote:
>
>>Hi!
>>
>>If you like to solve forced mate then you can try this:
>>
>>[D]2kr3r/qq2q1qp/nnb1nbn1/1B2QnN1/3N1Q2/1NQ1B1B1/1P4Q1/R1R3K1 w - -
>>
>>Please, indicate your result.
>
>Modified Crafty with Singular Extensions finds:
>
>9    15:20  Mat09   1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Qxb7+
>                    Kxb7 4. Rxc7+ Nxc7 5. Qxc7+ Qxc7 6.
>                    Nc5+ Qxc5 7. Ba6+ Ka7 8. Bc8+ Na4 9.
>                    Qb8# <HT>
>
>Maybe the number of moves will go down later, but I'm not going to let it search
>any longer. :)

Is it the first mate that your modified Crafty discovers
If it is then Junior is faster:

Junior5.9 on p200 has the follwong evaluation

9 0:52 MATE10 1.Qcxc6+ Nec7 2.Qxb7+ Qxb7 3.Qxb7+ Kxb7 4.Bxa6+ Ka8 5.Bf1+ Kb8
6.Nc6+ Kb7 7.Ra7+ Kc8 8.Qxc7+ Qxc7 9.Qxf5+ Qgd7 10.Rxc7#

Unfortunately Junior stops to search when it finishes iteration when it finds a
mate for itself.

I guess that chessmaster is faster in finding a mate but I did not check it.

Uri



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