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Subject: Re: In special mate searching mode or normal?

Author: Dann Corbit

Date: 15:22:37 08/17/00

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On August 17, 2000 at 18:08:36, Vincent Diepeveen wrote:

>On August 16, 2000 at 18:41:59, Lars Sandin wrote:
>
>>On August 16, 2000 at 17:48:20, Dann Corbit wrote:
>>
>>>On August 16, 2000 at 17:35:44, Jari Huikari wrote:
>>>
>>>>On August 16, 2000 at 17:23:33, Dann Corbit wrote:
>>>>
>>>>>Took 2 seconds to solve the hardest two.  The other took one second.  The
>>>>>machine was not a very fast one.  On one of the fast machines, it would probably
>>>>>do a lot better.
>>>>
>>>>Was the program searching especially for mates?
>>>
>>>Chest 3.19 by Heiner Marxen (the best mate solver on the planet by a landslide).
>>>
>>>>How much time would need
>>>>to find the moves, if these positions were in normal game?
>>>
>>>Infinite.  It does not play chess, since it's just a mate solver.  On the other
>>>hand, on a multithreading machine, you could have the mate solver buzzing away
>>>in its own little thread while your chess engine is playing chess in a normal
>>>fashion.  Then, if the mate solver sees something interesting, it could report
>>>it to the chess engine.  It is actually an idea I have been entertaining, and
>>>incredibly simple to implement.
>>
>>How fast (approx.) does the program see longer mate-sequences; for instance in a
>>normal game - a mate in about 10 moves?
>
>Oh well it's a mate only searcher. Let's give it a huge mate
>(which a selective searcher could find real quick btw)
>
>8/Bk3p1p/1P3p2/KP2n2p/1P1p4/1Pp2p2/B1P5/7B w - -
>
>If it finds a mate here, please post the line,
>as i don't have the winning line for this position. I know how to win
>it, but DIEP will not soon see a mate here, stack problem...
>...but i like to keep my mating probs complete.

That's not a mate in 10.  It is more than 20 ply to any mate from that position.



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