Computer Chess Club Archives




Subject: Re: One mate to solve... that now is very easy.

Author: leonid

Date: 10:20:00 05/06/01

Go up one level in this thread

On May 06, 2001 at 11:55:05, Paul wrote:

>On May 06, 2001 at 10:13:27, leonid wrote:
>>On May 06, 2001 at 06:22:26, leonid wrote:
>>>If you would like to solve a mate, you can try this moderate position:
>>>[D]Qqrkrq1Q/1QqqqqQ1/qBbnnbBq/1NQ2QN1/8/2Q2Q2/3RR3/3K4 w - -
>>>Please indicate your result.
>Ok ... my guess, before Heiner moves in with his heavy artillary, a mate in 9:
>06:18 WM9 09 Bxc7+ Qbxc7 Qxc7+ Qxc7 Qxd6+ Qcxd6 Nxe6+ Qexe6 Qfxf6+ Re7 Rxd6+
>Qxd6+ Qxd6+ Bd7 Qhxf8+ Qxf8 Qcc7#
>>After sending this last position I went to see its branching factor on one
>>professional program. I took it recently from the Web. After thinking for a
>>while program stopped breathing. Sudden death. Then I felt me a little bit
>>guilty by presenting upper position for Sunday. Better will be the next one that
>>is really. I did it yesterday before comming to the position that is above.
>No ... it wasn't too hard, Leonid! You must really be a nice guy, thinking about
>our feelings like that, thanks! ;)
>>[D]nqrkrqn1/1QqnnqQ1/1BnbbnB1/BQNNNNQB/8/8/3RR3/3KQ3 w - -
>>Please indicate your result.
>This one's a bit too easy, haha, found a mate in 6:

Cerrect, Paul!

This position is very curious since it give very high nodes/second rate for some
strange reason. When I solved it by brute force, it was 491k. Usually it will
not go beyond 200k. Very often will be only 45k. What was your NPS for it? Never
mind that you did by selective.


>00:04 WM6 06 Qxc7+ Nxc7 Nxd6 Nxa5 Qxd7+ Nxd7 Nc6+ Nxc6 Ncb7+ Qxb7 Nxb7#
>Have a nice Sunday,

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