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Subject: Re: One mate to solve... for Champions

Author: leonid

Date: 18:30:34 06/04/01

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On June 04, 2001 at 17:47:05, Heiner Marxen wrote:

>On June 04, 2001 at 11:10:30, leonid wrote:
>
>>On June 02, 2001 at 23:54:08, leonid wrote:
>>
>>>Hi!
>>>
>>>If you would like to solve some easy mate then try this:
>>>
>>>[D]qqnqBB2/rqqNQQ2/kqQQQRnK/rqqNQR2/bbqQQQ2/8/8/8 w - -
>
>Hello Loenid,
>
>First it is "easy", then it is for champions... and after nearly 30 hours
>my K7/600 has not even finished depth 8!  Geez!  What exactly is easy about
>this one?  Chest obviously does not get it.

Sorry, Heiner! It was my mistake. When I realized it, I put: "For Champions!".

You are almost at the end of solving it. By selective it was solved in 9 moves
in only 3 sec. My brute force was not very lucky but I expected that it is just
my bad lack. Already 6 moves (brute forcce) took 1 hour and 19 min.


>>>I know that at Sunday we have more people coming to this place that usual. So,
>>>if you will find previous position just too little for you, then go with the
>>>next:
>>>
>>>[D]1Q1qq1Q1/2rnnr2/1rBkqBr1/2pbbp2/1NPPPN2/Q2R2Q1/2RKR3/1q3q2 w - -
>
>Well, I thought I'll try this second one, before the first is ready, but:
>there is no mate in 10, here (K7/600, 350 MB hash, 30 minutes).
>Does not look like an "easy" one, either.
>
>>>Please indicate your result.
>
>Yes, when I have something to indicate, I will.
>... No Leonid, we did not forget you ;-)


Here you are probably very close to the end. I had chance to see on this
position very good branching factor and went 9 moves by brute force in 17 min
and 7 sec. You could have even better chance. Mate is just between 10 and 12.

Selective here give strange responses. At 12 moves it take 2 sec. but in 13 only
0.5 sec.

Was just too eager to see those positions solved and have optimal solution that
lead to mate. I very liked them.

Cheers,
Leonid.


>>>Thanks,
>>>Leonid.
>
>Cheers,
>Heiner



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