19 votes

Where did ChatGPT get this game from?

If you've attempted to play chess against ChatGPT, you quickly learn it doesn't know how to play, and constantly makes illegal moves. So I'm puzzled how it came up with a plausible game of chess. I ...
Polytropos's user avatar
17 votes
Accepted

What are the biggest free chess game databases? Is it legal to download games from them?

FICS database Lichess database Million base 2.2 PGNMentor Is it possible to use this information for my own purposes Absolutely! Nobody has the copyright. Enjoy your machine learning adventure!
SmallChess's user avatar
  • 22.5k
17 votes

Where did ChatGPT get this game from?

As this interesting video which explains how ChatGPT (and similar AIs) works, says about ChatGPT's problems when generating "answers": Hallucinations: model might make up wrong facts And ...
Brian Towers's user avatar
  • 97.1k
12 votes

Where did ChatGPT get this game from?

ChatGPT is a language predictor - it doesn't "know" anything but what words are likely to come next. What's interesting is that the Detector at https://openai-openai-detector.hf.space/ ...
Criggie's user avatar
  • 383
12 votes

What are the commonest checkmating moves in the Lichess (or similar) database?

I've downloaded the Lichess database from 2013 to the end of 2022, and counted the final move of all the games, including whether it was a check or checkmate. For space reasons, I processed this in a ...
Danya02's user avatar
  • 293
11 votes
Accepted

How can I get a collection of chess games with a 'Greek gift' sacrifice?

Something which might help here is Chess Query Language. Just like SQL does for relational databases, CQL can search in a database of chess games for positions/games which match certain criteria. I ...
Glorfindel's user avatar
  • 24.8k
11 votes
Accepted

Is testing an opening by having a computer play against itself viable?

If you're concerned about whether an opening is objectively good, then using computer games is a good approach. Computers don't play perfectly, but they are by far our best option. You could also ...
Inertial Ignorance's user avatar
10 votes

How can someone find their Morphy number?

You'd have to find a list of players Morphy has played. Then, you'd research as many players who played each of those players. This can all be done by searching by player in a large database. ...
Inertial Ignorance's user avatar
9 votes
Accepted

Generalise 'grandmaster games (...) castle opposite sides and the queenside players loses?' to finding games based on themes

Question: Is there a way I can search this up myself? Yes. There is a tool called CQL (Chess Query Language) which allows you to search a PGN file database of games for games that match some set of ...
Brian Towers's user avatar
  • 97.1k
8 votes
Accepted

What's the difference between SCID and SCID vs PC?

Shane's Chess Information Database (SCID) is a powerful Chess Toolkit, with which one can create huge databases, run chess engines, and play casual games against the computer or online with the Free ...
ferit's user avatar
  • 4,434
8 votes
Accepted

Is there a database of endgame positions with known perfect play?

Yes, it is call Lomonosov table : link It is all the positions with 7 or less pieces and the whole answer is known.
Sylvain Julmy's user avatar
8 votes

How can someone find their Morphy number?

I never heard of the 'Morphy number' until I read your post. I found that my Morphy number is 5. Here is how I did it. I started with Wikipedia After looking at the list I realized that my best ...
Michael West's user avatar
  • 5,196
8 votes
Accepted

Find an opening based on the position of one player only

Using my free, open source pgn-extract program you can specify a grep-like FEN pattern to be searched for in a PGN file of games. The program comes with a file of opening lines (eco.pgn) so a search ...
kentdjb's user avatar
  • 1,781
8 votes

Find an opening based on the position of one player only

As kentdjb already noted, there is no variation with that exact position which has an ECO entry. But it happened in sub lines of some ECO codes. I did a search on this database (only contains GM games ...
Nils Lindemann's user avatar
7 votes
Accepted

Personal chess database

SCID does everything you are looking for, it's great chess database software.
RemcoGerlich's user avatar
7 votes
Accepted

What is a chess database used for?

what is that database, really? A chess database is basically a collection of chess games, i.e. a collection of moves with metadata such as player names, date, Elo rating of players, place, opening ...
user1583209's user avatar
  • 20.7k
7 votes

Game databases vs. various languages/character sets

You don't need good English to play chess... https://tieba.baidu.com/p/5369964903 is Baidu (China's larger search engine) page on chess. Do you see? The Chinese know Nxf2, Qxe3+, Bg3. The ...
SmallChess's user avatar
  • 22.5k
7 votes
Accepted

Free opening name database?

There is an "eco" GitHub project available which I believe, based on the name, is based on the Encyclopedia of Chess Openings. This project used to provide a JSON file with all openings, but now ...
itub's user avatar
  • 10.5k
7 votes
Accepted

What are the percentage rates for each promotion type?

Here are the percentages for each promotion type according to different sources: |Promotion type | ChessBase | TWIC | ICCF | -------------------------------------------- | Queen | 96.9 |...
lodebari's user avatar
  • 3,363
7 votes
Accepted

FIDE database used for calculating current ELO

Is there somewhere the database FIDE use for calculating ELO rating of players? Yes and No. FIDE have such a database and they let us see some of the data but not in an easily downloadable form. For ...
Brian Towers's user avatar
  • 97.1k
6 votes

What is the average length of a game of chess?

We can make a small analysis from a theoretical point of view: Let us call 'n' the number of pieces on the board. In a match between players of similar strength, it is expected to find ~n/2 pieces ...
Diedrsch's user avatar
  • 429
6 votes

Is there an online database for the endgame KRPPKRP?

All of the Syzygy tablebases are available here: https://syzygy-tables.info/ These cover all endgames up to 7-man, and provide WDL (win-draw-loss) and DTZ (distance to zeroing move) data. Syzygy ...
Chromatix's user avatar
  • 1,679
6 votes

What are examples of grandmaster games where both Black and White castle opposite sides and the queenside players loses?

That's a pretty typical scenario, you'll find a lot of examples if you search for games in the sicilian opening. [Event "Sarajevo"] [Site "Sarajevo BIH"] [Date "2000.05.29"] [EventDate "2000.05.17"] [...
BlindKungFuMaster's user avatar
6 votes

Game databases vs. various languages/character sets

How do people use chess software in large countries like China, India or Russia, if they don't speak English, and more importantly, if they don't even know Latin letters? If they play FIDE rated ...
Brian Towers's user avatar
  • 97.1k
6 votes

Recommended software for ICCF play?

The best engine to use for analysis is most likely stockfish. Works with multiple procs, probably the strongest tactically. And as a bonus, it's free (but you should get a good UCI. I use Fritz UCI ...
Emphyrio's user avatar
  • 376
6 votes

Chess Problem Database with PGN or FEN

http://gorgonian.weebly.com/pgn.html https://exeterchessclub.org.uk/downloads (in chessbase format) Exeter chess club has many other valuable resources.
Fred Knight's user avatar
  • 3,132
6 votes
Accepted

Why is it so hard to find a free downloadable chess database with older/historical chess games?

I invite you do it yourself... https://github.com/student-t/ExtractPGN This is my Python repository for web crawling chess games. I use it to extract PGN chess games from Chessgames. This is an ...
SmallChess's user avatar
  • 22.5k
6 votes
Accepted

Dataset: Chess Positions and evaluation value

This is what I use for my training purposes for this project. Source
Sam Liu's user avatar
  • 108
5 votes
Accepted

Is it still possible to develop new openings?

Yes, it is still possible to find new openings. The combinatorial space after 3-4 moves is such large, that there are still many uncharted waters in opening theory. Many of such openings probably ...
Sir Cornflakes's user avatar

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