Search found 3974 matches

by jdart
Sat Jan 09, 2021 7:47 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan20 testsuite VS 4 top solvers
Replies: 41
Views: 5986

Re: Arasan20 testsuite VS 4 top solvers

I am also going to suggest replacements for numbers 65 and 71: 8/8/Q4p1k/6p1/4pNqn/PP2P1P1/3r1P2/2R3K1 b - - bm gxf4; id "arasan20.65"; c0 "Arasan-Wasp, FICS 2020 (analysis)"; 5k2/2N2p2/1p1p1nr1/p2P4/P1P3Pb/1P2Q3/1q6/3B1RK1 b - - bm b5; id "arasan20.71"; c0 "Ethereal 11.0-Stockfish 9, Andreas St\ ra...
by jdart
Fri Jan 08, 2021 10:45 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan20 testsuite VS 4 top solvers
Replies: 41
Views: 5986

Re: Arasan20 testsuite VS 4 top solvers

I would like to suggest the following replacements for the problematic positions. These are from a list of candidate test positions I have been collecting. None are super-hard but difficult enough to be interesting IMO. r2r1k2/p3qpp1/1p1ppn1p/n5B1/P1PNbP2/2P3Q1/4B1PP/4RRK1 w - - bm Bg4; id "arasan 2...
by jdart
Fri Jan 08, 2021 4:52 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Help with Texel's tuning
Replies: 33
Views: 4714

Re: Help with Texel's tuning

Texel tuning is basically supervised learning using logistic regression. There is a very large literature on this, outside of the field of chess.

For just one example: https://web.stanford.edu/~jurafsky/slp3/5.pdf
by jdart
Thu Jan 07, 2021 6:40 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan20 testsuite VS 4 top solvers
Replies: 41
Views: 5986

Re: Arasan20 testsuite VS 4 top solvers

Another couple positions that were mentioned: r1q1k2r/1p1nbpp1/2p2np1/p1Pp4/3Pp3/P1N1P1P1/1P1B1P1P/R2QRBK1 b kq - bm Bxc5; id "arasan20.3"; c0 "Mapanare-XXAAXX, Tues 23 Feb Rapid Engine Tour, Infinity Chess 2016"; depth 50 seldepth 13 multipv 1 score +213 nodes 32640209729 nps 18133439 hashfull 1000...
by jdart
Thu Jan 07, 2021 4:48 am
Forum: Computer Chess Club: General Topics
Topic: Arasan20 testsuite VS 4 top solvers
Replies: 41
Views: 5986

Re: Arasan20 testsuite VS 4 top solvers

Erroneous positions I found : Multi-PV analysis of these with Stockfish-12, dual Xeon e5-2690v3 (16 cores, 16G hash), 1/2 hour per position: engine ready 5rk1/8/pqPp1r1p/1p1Pp1bR/4B3/5PP1/PP2Q1K1/R7 w - - bm Rxg5+; id "arasan20.61"; c0 "sedarpi-noamgmi, www.chesspresso.net 2014"; depth 48 seldepth ...
by jdart
Wed Jan 06, 2021 2:20 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Help with Texel's tuning
Replies: 33
Views: 4714

Re: Help with Texel's tuning

Gradient descent can be run on parallel threads if you are using an algorithm like ADAM. Does not readily work with "mini-batches," though.

--Jon
by jdart
Thu Dec 31, 2020 6:41 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: My test for Arasan 22.2-x64-bmi2
Replies: 2
Views: 522

Re: My test for Arasan 22.2-x64-bmi2

Around +100 Elo points compared to Arasan 22.1 x64
I don't think so, not in my testing. Arasan has a pretty good book, though. That might have influenced your test.
by jdart
Thu Dec 31, 2020 1:42 am
Forum: Computer Chess Club: General Topics
Topic: OM GOLEM database with 30 mio games
Replies: 15
Views: 1525

Re: OM GOLEM database with 30 mio games

It's unfortunate, but there are a lot of garbage games out there. At the least, people have mangled and abused the Event and Site fields, if not corrupted the actual game. Then the bad games are copied and pasted into other databases and the rot spreads. ChessBase is pretty good about cleaning up wh...
by jdart
Wed Dec 30, 2020 7:15 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: YBW engines past and present?
Replies: 15
Views: 2544

Re: YBW engines past and present?

Arasan used YBW before version 21.0. I don't think Crafty uses DTS - I think that was a Cray Blitz thing - but the last few versions do have some interesting mods to multithreading.

--Jon
by jdart
Wed Dec 30, 2020 12:43 am
Forum: Computer Chess Club: General Topics
Topic: Komodo Dragon is Kicking Ass in TCEC
Replies: 46
Views: 9375

Re: Komodo Dragon is Kicking Ass in TCEC

That's even worse, as it becomes a competition of which opening book is better rather than which engine is better. SSDF actually does test with opening books enabled, if the engine has one. They always have. I think that goes back to the days when the top engines were pretty much all commercial and...