Search found 3953 matches

by jdart
Sun Dec 27, 2020 2:40 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Manually tuned evaluation
Replies: 18
Views: 1403

Re: Manually tuned evaluation

There is lots of stuff on evaluation tuning in this forum, see for example this thread:
http://talkchess.com/forum3/viewtopic.php?f=7&t=75234. Most people are automating it now. You can try changing values manually and see how that performs but you are not likely to find optimal values that way.
by jdart
Sun Dec 27, 2020 1:56 am
Forum: Computer Chess Club: General Topics
Topic: Deep Analysis
Replies: 21
Views: 1175

Re: Deep Analysis

ChessBase is just essential IMO. Go ahead, pay the $$$, prepare to be hooked.

But for analysis, should also mention the Chess Cloud Database project: https://www.chessdb.cn/queryc_en/. Live book you can query, and you can submit positions for analysis.

--Jon
by jdart
Sat Dec 26, 2020 10:32 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.2
Replies: 10
Views: 1274

Re: Arasan 22.2

3) Do you mean that you now always extend checks even if see < 0? What's the Elo diff with see >= 0 only?
There is no see test for extensions. However, bad checks can be pruned at low depth. This change, vs. having a SEE test on the extension, was very close to neutral (no ELO change).
by jdart
Sat Dec 26, 2020 3:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: question about gensfen
Replies: 9
Views: 612

Re: question about gensfen

For eval training (Texel method) I have also "decided to label the positions afterwards," as Joost Buijs did. I have used several methods to generate them including sampling from the search. But then I play out games from the positions using this script: https://github.com/jdart1/arasan-chess/blob/m...
by jdart
Sat Dec 26, 2020 1:20 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: question about gensfen
Replies: 9
Views: 612

question about gensfen

I am looking at: https://github.com/nodchip/Stockfish/blob/master/src/learn/gensfen.cpp The question is - it looks like by default it occasionally inserts a random move into the played games to increase variety. But then when the game is ended, it assigns the same result to all the generated FENs fo...
by jdart
Thu Dec 24, 2020 8:54 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.2
Replies: 10
Views: 1274

Re: Arasan 22.2

NO NN or NNUE Support ?
No, not yet. If you want it, you can submit a pull request ;-).

--Jon
by jdart
Thu Dec 24, 2020 8:53 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.2
Replies: 10
Views: 1274

Re: Arasan 22.2

>Arasan test suite is no more updated? I use it a lot. One buggy position is probably 121 I have collected some newer test positions but haven't put them into a new test suite, not yet. It is on my to-do list. Meanwhile, thanks for the correction. I will do some testing on this one but it looks like...
by jdart
Wed Dec 23, 2020 2:47 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: FRC in CECP
Replies: 31
Views: 2126

Re: FRC in CECP

CECP should have died 2 decades ago I think it is unnecessarily complex. And, as noted, can be poorly implemented. But UCI has its own issues too, and can be poorly implemented also. My main issue with UCI is that it basically treats the engine as a remote callable search function. It assumes you h...
by jdart
Wed Dec 23, 2020 12:04 am
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.2
Replies: 10
Views: 1274

Re: Arasan 22.2

When I download the windows engine + book file, it has 0kb. It's definitely on the server and is downloadable. You might want to check your antivirus. For example, Bitdefender may block the download, not because it detects malware, but because "this file is not commonly downloaded". But if I got to...
by jdart
Tue Dec 22, 2020 10:27 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.2
Replies: 10
Views: 1274

Arasan 22.2

Arasan 22.2 is available from https://www.arasanchess.org Changes in Arasan 22.2: 1) Cleanups and fixes in Makefile + CMakeLists.txt. Fix GCC version detection. Better detection of clang compiler. Support Intel oneAPI complier. 2) Bug fixes in protocol class for cases where ponder search terminates ...