Computer Chess Club Archives




Subject: Re: Try to solve mate.

Author: Paul

Date: 05:51:31 09/14/02

Go up one level in this thread

On September 14, 2002 at 07:55:35, leonid wrote:

>This mate is easy and only 9 moves deep:
>[D]bqRNNkqr/Q7/qPnPqBqN/Q4q2/5Qr1/5q2/5nQ1/bQqQqBKR w - -

Hi Leonid,

Pretz (p3/1000) also finds this one easy, it gets this in 3 seconds:

00:03 WM9 06 Nxe6+ Qgxe6 Be7+ Nxe7 dxe7+ Qxe7 Qaxf5+ Bf6 Nxf6+ Qaxc8 Nh7+ Ke8
Qxg6+ Rxg6 Qgxg6+ Qf7 Qaxf7#

>Still, maybe, You will be tempted for something more heavy and I this way will
>be able to find more on this position:
>[D]2qRQq2/p6P/q1BqqR1N/r6B/n1QNQQ1B/r6k/b1QKNP1q/bq4qn w - -
>On description of this mate I can see that it was solved by selective in 13
>moves but brute force search went not up to the end in order to find shortest
>move. Brute force search, without finding any mate, went only 9 moves deep.

This one was indeed a lot more difficult, mine didn't fare so well here:

06:49 WM11 07 Q8xe6+ Qdxe6 Qff3+ Rxf3 Qxf3+ Kxh4 Nhf5+ Rxf5 Nxf5+ ...

So it found a mate in 11 in almost 7 minutes, with an incomplete pv ... these
d#*&#@rned hashtables ;) ... will have to think about this ... any tips anyone?

>Please indicate Your result.

Thanks for your mates as usual ...


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