hi all i need help with Gaviota and scorpio bitbases do they exist?
is there any software to generate them .thanks
http://www.cruxis.com/chess/houdini.htm
6 men Gaviota and Scorpio bitbases
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saanjh3163
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User923005
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Re: 6 men Gaviota and Scorpio bitbases
Neither one exists.
Probably, they are not practical today anyway, unless you have 100 Gigs of RAM or so.
Recall that these bitbase tables reside in main memory, and that in doing so they also subtract from the available size of the hash table.
Hence, to be most useful, they must reside entirely in memory and also must offer more gain than the loss in size of hashtable loses Elo.
For 5 man files, this has been clearly demonstrated on current hardware. I guess that for 6 man files you will need a stupendous amount of RAM before such tables would be worthwhile.
That is on the one hand. On the other hand, size of available memory scales exponentially over time so that soon 100[*] Gigs of main memory RAM will be common place.
[*] Depending on your available cash and level of sanity, it can even be available today.
Probably, they are not practical today anyway, unless you have 100 Gigs of RAM or so.
Recall that these bitbase tables reside in main memory, and that in doing so they also subtract from the available size of the hash table.
Hence, to be most useful, they must reside entirely in memory and also must offer more gain than the loss in size of hashtable loses Elo.
For 5 man files, this has been clearly demonstrated on current hardware. I guess that for 6 man files you will need a stupendous amount of RAM before such tables would be worthwhile.
That is on the one hand. On the other hand, size of available memory scales exponentially over time so that soon 100[*] Gigs of main memory RAM will be common place.
[*] Depending on your available cash and level of sanity, it can even be available today.
Re: 6 men Gaviota and Scorpio bitbases
Depends what you call soon...User923005 wrote:soon 100[*] Gigs of main memory RAM will be common place.
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User923005
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Re: 6 men Gaviota and Scorpio bitbases
I estimate 6-8 years, assuming a 4 GB average today.ernest wrote:Depends what you call soon...User923005 wrote:soon 100[*] Gigs of main memory RAM will be common place.
It goes in fits and starts, but roughly doubles each year.
My first PC was fully loaded with 640K of RAM, a 5 MB hard drive and an 8087 processor. With the color monitor the cost was a mere $5000.
This machine has 13 GB RAM, 3 TB hard disk, 8 cores and a GPU card that can perform 2 TFlops. I think it was about half the cost of the first PC I used (but I did not purchase it so I am not sure).
When you're an old guy like me, you've seen miracles. In fact, I've come to expect them and I will be entirely disappointed if new miracles fail to manifest themselves on a yearly basis.