Search found 3632 matches

by jdart
Fri Jul 19, 2019 1:43 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 25
Views: 933

Re: Math question

A huge advantage of self-play is that the time can be hidden in “normal” testing inside the testing frame work. The time controls for these games is VERY fast and a huge number of games are played per year. e.g. SF testing frame work can produce 1,000 to 2,000 games per minute or between 500,000,00...
by jdart
Thu Jul 18, 2019 9:04 am
Forum: Computer Chess Club: General Topics
Topic: Buying a refurbished computer
Replies: 1
Views: 225

Re: Buying a refurbished computer

I have several refurbished workstations, mostly HP. Businesses tend to lease these for 3 years. Once they are off lease, they are sold to a liquidator, and are often available at attractive prices. It is pretty common to remove the hard drive for security reasons. eBay usually has a large selection....
by jdart
Wed Jul 17, 2019 2:43 pm
Forum: Computer Chess Club: General Topics
Topic: buying a new computer
Replies: 163
Views: 4802

Re: buying a new computer

Human opening theory is almost irrelevant to modern engine play even though I think engines suck at opening play as compared to their middle game play. AND human opening theory could be made completely irrelevant if learning books were widely used in engines. What we call human opening theory these...
by jdart
Wed Jul 17, 2019 1:57 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 25
Views: 933

Re: Math question

Well, if your keeping the book statistics up to date as new games are played then the highest scoring move should be played next. But, this isn't the best move AND it's not meant to be the best move. There are two consideration involved, one is the best scoring move and the other is the move that t...
by jdart
Tue Jul 16, 2019 5:02 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 25
Views: 933

Re: Math question

You can view move selection as an example of the "multi-armed bandit" problem. You have a prior distribution of outcomes (win/loss/draw) and you are trying to optimize the future "payout" (score). There is a very large literature on this but one approach is called Thompson Sampling (https://en.wikip...
by jdart
Tue Jul 09, 2019 7:33 pm
Forum: Computer Chess Club: General Topics
Topic: Ferret 1.00 v258 - program from 1995
Replies: 36
Views: 3177

Re: Ferret 1.00 v258 - program from 1995

Ferret competed in quite a few tournaments from 1995-early 2000s, and it was active on chessclub.com. Some games are available here:

http://www.chessgames.com/perl/chessplayer?pid=30003
by jdart
Mon Jul 08, 2019 1:38 am
Forum: Computer Chess Club: General Topics
Topic: 7 Man Syzygy and SSD
Replies: 46
Views: 3941

Re: 7 Man Syzygy and SSD

Nordlandia wrote:
Sat Jul 06, 2019 5:54 pm
MikeB: if you have time please comfirm whether cutechess gui adjourn 7-piece positions.
It doesn't. See:

https://github.com/cutechess/cutechess/issues/499
by jdart
Fri Jul 05, 2019 12:16 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: syzygy / fathom
Replies: 6
Views: 432

Re: syzygy / fathom

Which Fathom are you using? Is it https://github.com/jdart1/Fathom? If the command-line tool works on your position, then you have to be passing something different into the API for it to not work for you. You do have to call tb_init first. Btw. the newer and now preferred root level probing API cal...
by jdart
Wed Jul 03, 2019 9:56 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Severe windows 10 problems. What to do?
Replies: 49
Views: 1529

Re: Severe windows 10 problems. What to do?

I wouldn't conclude it is software - could be your disk is failing/has bad sectors.

You could try to reinstall the OS from media. You might find this helpful (no guarantees):

https://www.intowindows.com/how-to-rein ... sing-data/
by jdart
Wed Jul 03, 2019 3:50 am
Forum: Computer Chess Club: General Topics
Topic: Arasan 21.4
Replies: 3
Views: 495

Re: Arasan 21.4

I noticed arasanx-64-bmi2.exe (BMI2 but non-NUMA build) was missing from the engine archive (arasan21.4.zip) so I updated it to include that.

--Jon