Search found 3811 matches

by jdart
Wed Jul 01, 2020 10:29 am
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.1
Replies: 11
Views: 629

Re: Arasan 22.1

fjpv wrote:
Wed Jul 01, 2020 10:02 am
Trying to download the Arasan 22.1 Windows installer and I receive a message 404 Error - Page Not Found.
Please try again - should be fixed now.

--Jon
by jdart
Wed Jul 01, 2020 12:58 am
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.1
Replies: 11
Views: 629

Arasan 22.1

Arasan 22.1 is available from https://www.arasanchess.org . Changes in Arasan 22.1: 1) Remove potential passer scoring. 2) Tighten validation of hash/killer moves 3) Fix Resign threshold option (CECP mode) 4) Simplify lmp threshold computation. No longer different for PV. 5) Modify formula for lmp c...
by jdart
Sun Jun 28, 2020 4:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Syzygy 6 dtz problem
Replies: 3
Views: 291

Re: Syzygy 6 dtz problem

But the 6 dtz isn't read by the computer.
Not clear what program/interface you are using?
by jdart
Sun Jun 28, 2020 2:28 pm
Forum: Computer Chess Club: General Topics
Topic: Test position: Lc0 vs Stockfish, TCEC 18, game 65
Replies: 28
Views: 1109

Re: Test position: Lc0 vs Stockfish, TCEC 18, game 65

Several TCEC games have been featured on https://www.chesspublishing.com recently. Formerly they used to pretty much ignore computer games, but now the GMs writing their columns are paying attention.

--Jon
by jdart
Sat Jun 27, 2020 9:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Testing Search and Evaluation
Replies: 6
Views: 291

Re: Testing Search and Evaluation

Fixed-depth testing is not really an established method for eval tuning.

The standard way to tune eval parameters is the "Texel" tuning method, more properly termed logistic regression. Lots of discussion of that in this forum, if you search.

--Jon
by jdart
Mon Jun 22, 2020 9:23 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Java vs C. It's not like one would think.
Replies: 13
Views: 777

Re: Java vs C. It's not like one would think.

Obviously my experience is absurdly out of date, but I am curious what things are like now: not just whether one can get high-performance Java (one always could if one wrote everything in terms of primitives and arrays) but whether one can write at a high level of abstract and still get good perfor...
by jdart
Fri Jun 19, 2020 2:17 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tool and data for Texel Tuning
Replies: 3
Views: 368

Re: Tool and data for Texel Tuning

4. Either cull, or Qsearch and play out the PV if there is one. I'm not sure this play-out idea works in practice. My tuning program accepts non-quiet positions. It does a shallow-depth search on each position, producing a PV. Then the position at the end of the PV is scored. Its score is used inst...
by jdart
Wed Jun 03, 2020 6:50 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Ryzen 2 and BMI2?
Replies: 41
Views: 6609

Re: Ryzen 2 and BMI2?

In the USA power is cheap
It varies by locality. It is not cheap in Northern California. I finally had to get solar because running multiple servers 24/7 was pushing my power bill above $500/month, at least in the summer when I also run air conditioning.

--Jon
by jdart
Mon May 25, 2020 5:21 pm
Forum: Computer Chess Club: General Topics
Topic: Is the Latvian losing?
Replies: 43
Views: 3027

Re: Is the Latvian losing?

Here is some data for the Latvian Gambit: I don't think those are all Latvian positions, for example: rnbqkb1r/ppp2ppp/4n3/3pP3/8/3P1Q2/PPP3PP/RNB1KBNR w KQkq - Black apparently hasn't played .. f5. But your comment about the opening is valid. A lot of the entertaining positions for Black are in li...
by jdart
Sat May 23, 2020 10:51 pm
Forum: Computer Chess Club: General Topics
Topic: SSD SATA Recommendation
Replies: 28
Views: 1419

Re: SSD SATA Recommendation

Samsung 860 PRO and 860 EVO series are good in my experience. M.2 drives are faster though (Samsung 970 series).