Search found 605 matches

by duncan
Sun Jul 05, 2020 4:06 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 4559

Re: Throwing out draws to calculate Elo

hgm wrote:
Sat Jul 04, 2020 11:48 am
It is difficult to deduce what his problem is, as what he writes is self-contradicory. He doesn't disagree with the number, but with its value... What the heck does that mean???
I assume it just means the model is wrong. So while in theory it is 1/256. In practise it is much lower.
by duncan
Fri Jul 03, 2020 8:58 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 4559

Re: Throwing out draws to calculate Elo

Dann Corbit wrote:
Fri Jul 03, 2020 7:36 am


Do you actually believe in a file of 8 million games with 8 wins and no losses that the 8 wins are not statistical noise?
Not been following this properly but in your opinion what is the maximum amount of games that you can have for the 8 wins not to be statistical noise?
by duncan
Fri Jun 26, 2020 4:14 pm
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

So RAM cost will dominate when it becomes feasible for ordinary {albeit a bit nuts} humans to do it. I might even be able to give it a go. But who knows. The only people who are a bit nuts is the government for not spending a paltry million dollars for a stunning 8 piece database. If you do it, you...
by duncan
Fri Jun 26, 2020 8:56 am
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

Dann Corbit wrote:
Thu Jun 25, 2020 4:20 pm
You don't need enormous ram to use the tablebase files.
You need enormous ram to build them.
But even accessing 8 men files, you will need a lot of RAM.
Either that, or there will be a speed trade-off.
and by a lot of RAM to access 8 men files do you mean many TBs of RAM ?
by duncan
Thu Jun 25, 2020 9:59 am
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

Around 2,000 TB of disk space would probably be enough to store the full 8-piece set (WDL+DTZ). Today, storage is $20/TB https://edwardbetts.com/price_per_tb/ So only $40,000 for the disk. Server memory currently runs about $10K/TB (unless you need the greasy fast stuff) $640,000 for RAM. In five y...
by duncan
Mon Jun 22, 2020 7:27 pm
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

Supercomputers provide transparent (via kernel related special software) access to all memory as a globally adressable block, though it is not fastest possible approach (penalty can be 10-20x times, in some cases 100-1000x times). Specially written algo can be faster, but any cluster-unaware progra...
by duncan
Sun Jun 21, 2020 11:20 pm
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

This article from the Lomonosov tablebase page estimates that the size of an 8-man tablebase will be ~100x larger than a 7-man table base and will take a minimum of 10,000 TB of disk space and 50 TB of RAM, limiting its completion to a top-10 super computer Syzygy 7-piece was about 1 Tb of Ram and ...
by duncan
Sun Jun 21, 2020 12:25 am
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

This article from the Lomonosov tablebase page estimates that the size of an 8-man tablebase will be ~100x larger than a 7-man table base and will take a minimum of 10,000 TB of disk space and 50 TB of RAM, limiting its completion to a top-10 super computer Syzygy 7-piece was about 1 Tb of Ram and ...
by duncan
Thu Jun 18, 2020 8:14 pm
Forum: Computer Chess Club: General Topics
Topic: What is the best way to obtain the 7-piece tablebases?
Replies: 44
Views: 6370

Re: What is the best way to obtain the 7-piece tablebases?

If you want to let an engine probe the TBs during the search, the RTBW files should be on SSD or the search will slow down a lot. For RTBZ files this is much less critical. My apologies for being off topic, but if you had access to Summit scientific supercomputer, how many piece tablebase would it ...
by duncan
Fri Jun 12, 2020 6:23 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish play very decent giving pawn odds.........
Replies: 99
Views: 6933

Re: Stockfish play very decent giving pawn odds.........

My question is if Carlsen need three takeback moves, how many takeback will a master rated player needs at lest 20 or he will need to replay the same game one hundredth time until he draw . Maybe Carlsen needs 20 to draw. Maybe 100 aren't enough. We can't even start to speculate because this terrai...