Computer Chess Club Archives




Subject: Re: If you like to solve real mate... Correction!

Author: Heiner Marxen

Date: 10:14:59 01/27/01

Go up one level in this thread

On January 27, 2001 at 12:39:36, Paul wrote:

>On January 27, 2001 at 11:35:13, leonid wrote:
>>>[D]qn1kbrqn/n1nqn1bp/bN1N1N1N/B1N1Nn1B/N1N1N1N1/8/1R1Q1R2/3K4 w - -
>>>Mate existe for sure in 12 moves. (Before I wrote 11.) Response was found by selective search and minimal number of moves is unknown.
>Wot ...? No Kangaroos? ;)

Pleazzee, no Kangaroos, Chest caaant do themm!  ;-)

>Ok, couldn't resist ... how about this:
>WM8 1. Nxa8 Ne3+ 2. Kc1 Qxc4+ 3. Ndxc4 N7d5 4. Bxc7+ Qxc7 5. Qxd5+ Nxd5 6. Ne6+
>Ke7 7. Nxd5+ Kxe6 8. Naxc7x

You can try 4.Nxc7, that should be 1 move less deep.

According to Chest this is a mate in 7 and has 2 key moves: Nxa8 and Nbxd7:

 Nxa8  Ne3+ Kc1  N7d5 Ndb7+ Bxb7 Nxb7+ Ke7  Nhxg8+ Rxg8 Nxg8+ Ke6 Nec5#
 Nbxd7 Nb5  Nxf8 Nc3+ Kc1   Bd7  Nhf7+ Qxf7 Nexf7+ Nxf7 Nxf7+ Kc8 Ncb6#

Although there are 7 different checking moves, the key moves are to
capture a queen, and allow black to check white.  Funny.

(15.2 minutes K7/600 60MB hash)


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