Author: Dieter Buerssner
Date: 13:06:55 05/25/05
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On May 24, 2005 at 17:57:50, Andreas Guettinger wrote: >I created the bitbases. Bitbases didn't influence the nodes alot, but the search >time decreased. Bitbases can help to avoid TB-hits, and by this speed up the search. Depending on the position, they can also make the search tree smaller. But not so much, when searching for a mate, and the score is already very high. Bitbases will not report mate scores, but rather scores like +10 (which is enough, to help the engine to find a win). When searching for a score better +12, they often cannot help to cutoff the tree, when with +7 score, they would help. >It finds now the mate in 18 in under 6 mins. (See below) >I also increased the hashtable to 130M, which in contrast reduced the nodes that >have to be calculated (which makes sense actually). :) Your computer looks rather fast, considering the many TB hits, you will have had. >What HT size do you use? For the tests I posted, I used 600 MB. Typically, I use that much, as I have available. For example 850 MB on a 1 GB Ram computer when expecting no TB hits. Here I used a bit less, because many disk accesses could be expected, and I wanted to leave some space for the OS disk cache. I used a notebook with rather slow disk (compared to a typical modern desktop computer). >Lilo and Grub are not USB aware, the USB support is provided by the BIOS and >that unless your BIOS supports a USB keyboard, you may not be able to select a >non-default boot image using the USB keyboard. > >http://www.linux-usb.org/USB-guide/x194.html > >The option in the BIOS that hast to be enbled is called 'usb legacy support'. It >may help to update BIOS. Thanks. Seems my BIOS does not have this option :-( Regards, Dieter
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