Author: Heiner Marxen
Date: 15:08:35 05/04/01
Go up one level in this thread
On May 04, 2001 at 17:42:01, leonid wrote: >On May 04, 2001 at 17:09:35, Heiner Marxen wrote: > >>On May 04, 2001 at 16:05:36, leonid wrote: >> >>>On May 04, 2001 at 15:38:23, Angrim wrote: >>> >>>>On May 04, 2001 at 10:26:02, leonid wrote: >>>> >>>>>Hello! >>>>> >>>>>Had bad lack this midnight when one call came from my work. It took me 20 >>>>>minutes to do it but I went to my bed only at 2 o'clock. One good result from >>>>>broken sleep was this position that you can try to solve. It probably will >>>>>demand one sleepless night from your program, if you will insist on shortest >>>>>mate. >>>>> >>>>>[D]RnqkqnR1/qBNbNBq1/QqQqQqQ1/BrQqQrB1/3q4/8/3Q4/3K4 w- - >>>>> >>>>>Please indicate your result. >>>>> >>>>>Thanks, >>>>>Leonid. >>>> >>>>this one IS tough, >> >>Chest agrees: there is no mate in 12, as found in 2.1 hours (K7/600, 350MB). > > >Great, Heiner! It is for sure mate in 13. I just said this to Paul before >finding your message. Expected that maybe you will go farther that me, since >your branching factor is usually good and you have hash installed. With my hash >free (have no idea how much hash will be able to help me) at 10 moves my Every single MB will help! When I started to use a hash table computers had much less memory, and even half an MB was a lot of help for Chest, although hash entries for Chest are much larger (40 bytes) than for most other programs. But if you do not take the small risk of an undetected hash collision, you have to put in the complete board. BTW, I just started depth 13. Cheers, Heiner >computer (Celeron 600) took already 2 hours and 7 minutes to say no. > >My pleasure to see you at work, Heiner! > >Salut, >Leonid.
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