Search found 691 matches
- Mon Nov 21, 2016 8:15 am
- Forum: CCRL Public
- Topic: Newcomer's questions
- Replies: 6
- Views: 6599
Re: Newcomer's questions
I've just replied to your mail, then noticed that it was already too late! So quoting my reply here. But basically it's good idea to ask in the forum first whenever possible. Dear Deterdettol, Thanks for your question and interest, and welcome to the forum! Your questions are most certainly appropri...
- Thu Apr 14, 2016 9:54 am
- Forum: Endgame Tablebases
- Topic: Help needed with tablebase generator
- Replies: 15
- Views: 97038
Re: Help needed with tablebase generator
Your second method is roughly what I use in my solvers, it's called the "grandfather method". Is is described a bit here: https://chessprogramming.wikispaces.com ... #Algorithm and also in 1986 Ken Thompson's paper.
- Thu Apr 14, 2016 9:42 am
- Forum: Endgame Tablebases
- Topic: Help needed with tablebase generator
- Replies: 15
- Views: 97038
Re: Help needed with tablebase generator
Hi Dan, Here is a standard technique for finding bugs in a tablebase. Iterate through all positions in a finished tablebase. For each position, make all possible moves, including captures and promotions (search 1 ply deep). Compute the position value based on this search, and compare with the stored...
- Wed Feb 24, 2016 11:05 pm
- Forum: CCRL Public
- Topic: Request for deltas
- Replies: 1
- Views: 4995
Re: Request for deltas
Well the only way for us to provide such deltas is by running diff on complete databases of two weeks. Simply uploading a separate PGN of only last week's games is not enough, because sometimes engines are removed or renamed, or errors are corrected, which affects older games. We take special care t...
- Sat Jan 16, 2016 2:02 am
- Forum: Endgame Tablebases
- Topic: 2 questions about chessboard's symmetry
- Replies: 1
- Views: 33706
Re: 2 questions about chessboard's symmetry
Hello everyone, I would be grateful if you could give me answers to my questions: 1. Can I use only vertical/horizontal symmetry (i.e. restricting king to the a1-d1-d4-a4 square) in the pawnless endgame? I ask this question, because in early work they allowed black king to stay in the a1-h1-e4-d4 t...
- Wed Aug 26, 2015 9:05 am
- Forum: Endgame Tablebases
- Topic: EGTB data mining
- Replies: 3
- Views: 38177
Re: EGTB data mining
Hi Vincent,
If I remember correctly, Wilhelm should be able to do this sort of mining. Have you tried it?
If I remember correctly, Wilhelm should be able to do this sort of mining. Have you tried it?
- Mon Jul 06, 2015 3:23 am
- Forum: Endgame Tablebases
- Topic: W/D/L results for unique positions with specific materials
- Replies: 1
- Views: 33860
Re: W/D/L results for unique positions with specific materia
krkp - 4,054,640 positions with white to move, 4,986,658 positions with black to move (listed as kpkr in NULP stats file).Doirse wrote:(krkp - 4,054,640 ESM)
Welcome and good luck in your search!
- Mon Jul 06, 2015 3:19 am
- Forum: Endgame Tablebases
- Topic: Number of positions in chess endgames
- Replies: 20
- Views: 126450
Re: Number of positions in chess endgames
this is incredibly fascinating! It is! Is it possible to create W/D/L results for all possible positions in a specific endgame? For example, looking at the NULP results for KRKP endgames there are 9,041,298 possible legal positions. How would one go about determining how many of those are W/D/L for...
- Thu Mar 12, 2015 3:08 am
- Forum: Endgame Tablebases
- Topic: Question about interpreting Syzygy EGTB output
- Replies: 1
- Views: 36076
Question about interpreting Syzygy EGTB output
Someone asked me by email: Hello Kirill, Could you please explain me how should I interoperate the analysis results of the Syzygy EGTB running on Houdini 4. I am attaching a screenshot and would like to understand the meaning of the numbers within the parentheses. Thank you, Syzygy-egtb-question-ima...
- Thu Mar 12, 2015 2:59 am
- Forum: CCRL Public
- Topic: Mac vs. PC vs. humans some noob questions
- Replies: 3
- Views: 7264
Re: Mac vs. PC vs. humans some noob questions
In which direction would you say the error for top engines is? Carlsen is currently rated FIDE 2863. Stockfish is currently rated CCRL 3314, so theres a 451 point difference. Do you thinks this 451 over or under estimates the real performance difference? In other words: A: Are top engines even stro...
- Mon Mar 09, 2015 7:02 am
- Forum: CCRL Public
- Topic: Mac vs. PC vs. humans some noob questions
- Replies: 3
- Views: 7264
Re: Mac vs. PC vs. humans some noob questions
1. Does anybody know if Stockfish plays better/worse on PC vs. Mac (with equivalent settings)? Is there any reason to think that chess engines running through Mac OS might be inferior? Superior? --> For instance would Stockfish for Mac out play Stockfish for PC or vice versa? If there's a discernib...
- Thu Mar 05, 2015 10:54 pm
- Forum: CCRL Public
- Topic: Engine Elo estimation for Stockfish 6 4CPU
- Replies: 5
- Views: 9528
Re: Engine Elo estimation for Stockfish 6 4CPU
Perhaps a larger hash is dictated for the 10-15 minute analysis, a medium hash for 2 minute analysis? Yes, but I think the difference is not significant enough to worry about. 512 MB for 2 minutes and 2 GB for 10-15 minutes should be more than enough, IMO. I don't think it makes sense to keep chang...
- Wed Mar 04, 2015 2:03 pm
- Forum: CCRL Public
- Topic: Engine Elo estimation for Stockfish 6 4CPU
- Replies: 5
- Views: 9528
Re: Engine Elo estimation for Stockfish 6 4CPU
In general hash size has very minor effect on engine performance (outside of extremely small sizes). The gain from hashtable size saturates at some point, depending on time control and hardware speed. Any engine playing blitz game won't benefit much from a 64 GB hashtable, at least not measurably mo...
- Wed Mar 04, 2015 1:54 pm
- Forum: CCRL Public
- Topic: Project
- Replies: 1
- Views: 4599
Re: Project
Welcome and good luck with this project! Elo weights recent games more heavily than older games (weighted average). True for human games, but not in computer chess. In engine games generally all games are weighted equally when computing the ratings. 1. Where can I find the data in a manageable form ...
- Thu Dec 18, 2014 1:53 pm
- Forum: CCRL Public
- Topic: Newb Qustions
- Replies: 3
- Views: 6015
Re: Newb Qustions
I understand that you run BayesElo with the whole database before each list update to get the ratings, am I right? Yes. If so, how do you precisely then determine the number to add to the ratings to get the numbers given in the list? Reason for asking: I'd like to know roughly the "CCRL rating...
- Wed Sep 17, 2014 12:52 pm
- Forum: Endgame Tablebases
- Topic: Using the retro chess .dll in a c++ program
- Replies: 2
- Views: 36519
Re: Using the retro chess .dll in a c++ program
Hi and welcome back! This is very much on topic here. Unfortunately I have no answer, as I never used RetroChess. Hopefully someone can help.
(Also, If I may, I'll point out that this question demonstrates how closed probing code may be a major obstacle to tablebase format adoption).
(Also, If I may, I'll point out that this question demonstrates how closed probing code may be a major obstacle to tablebase format adoption).
- Tue Jul 08, 2014 7:23 am
- Forum: CCRL Public
- Topic: A theoretical exercise...
- Replies: 2
- Views: 5198
Re: A theoretical exercise...
Here is one relevant chart: http://rwbc-chess.de/Additional/chronology.htm I think there should be more than 1000, just counting engines. Much larger number if you also counted non-engine chess program, including those for all obscure and ancient devices. (Also, it will depend a lot on your definiti...
- Mon Apr 14, 2014 8:53 am
- Forum: Endgame Tablebases
- Topic: Number of positions in chess endgames
- Replies: 20
- Views: 126450
Re: Number of positions in chess endgames
Someone asked me about the number of positions with en passant capture rights, and how it compares to number of positions with castling rights. So I added such numbers to the NULP site ( link ). In particular, the following chart may be interesting. http://kirill-kryukov.com/chess/nulp/images/Propor...
- Thu Mar 20, 2014 7:58 am
- Forum: CCRL Public
- Topic: How do I access my own posts?
- Replies: 2
- Views: 5000
Re: How do I access my own posts?
Can you tell me how to access the message recently posted by me in the Endgame Tablebases forum? Endgame Tablebases is a public forum, so your post should be accessible by you as well as anyone else by following this link: http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=6&t=743...
- Mon Jan 06, 2014 3:06 am
- Forum: Endgame Tablebases
- Topic: Number of positions in chess endgames
- Replies: 20
- Views: 126450
Re: Number of positions in chess endgames
The number of 8-piece FRC positions: 39,587,704,309,395,475.
- Wed Jan 01, 2014 1:39 pm
- Forum: Endgame Tablebases
- Topic: Some DTM50 work.
- Replies: 23
- Views: 159807
Re: Some DTM50 work.
Hi galen, thank you for sharing your very interesting results!
Can you verify your tables against Kronsteen's ones?
Do you think you could compute all 6-piece tables using 64 GB or RAM?
Are you planning to release the generator, the tables, or to make a web-interface?
Welcome to this forum!
Can you verify your tables against Kronsteen's ones?
Do you think you could compute all 6-piece tables using 64 GB or RAM?
Are you planning to release the generator, the tables, or to make a web-interface?
Welcome to this forum!
- Fri Dec 27, 2013 8:34 am
- Forum: Endgame Tablebases
- Topic: Number of positions in chess endgames
- Replies: 20
- Views: 126450
Re: Number of positions in chess endgames
The number of unique legal positions in 8-piece chess endgames: 38,176,306,877,748,245. Not sure if I'll count for 9-pieces. ![Smile :-)](./images/smilies/icon_smile.gif)
![Smile :-)](./images/smilies/icon_smile.gif)
- Thu Sep 12, 2013 3:29 am
- Forum: Endgame Tablebases
- Topic: New 6-piece tablebase generator
- Replies: 14
- Views: 80381
Re: New 6-piece tablebase generator
Here is a Windows 64-bit binary of Stockfish 4 with added syzygybases access capability. Compiled with MinGW GCC 4.8.1 from Cygwin64 distribution. Non-PGO build, "x86-64-modern" architecture (with popcnt). The source was obtained from here (link was posted by Ronald on CCC).
- Tue Aug 13, 2013 2:53 pm
- Forum: Endgame Tablebases
- Topic: Longest Win for each Bishop Combination?
- Replies: 4
- Views: 12451
Re: Longest Win for each Bishop Combination?
Yes, this archaic software unfortunately has some issues with Vista and 7. I managed to install it on Vista few years ago, but I forgot the details now. Still, it's excellent once you manage to install it. May be try experimenting with compatibility options, or install XP in a virtual machine. Sorry...
- Tue Aug 13, 2013 1:51 pm
- Forum: Endgame Tablebases
- Topic: Tablebases - what now ?
- Replies: 2
- Views: 10467
Re: Tablebases - what now ?
Hello muzzoid, and welcome to this forum! About the Lomonosov 7-man tablebases - they may be complete, but they are not available (unless I am missing something), as well as the generator they used. So there is still work to be done in this area. In 6-man tablebases, probably syzygy's project is the...