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Questions tagged [python-chess]

For questions about the python-chess library (for questions about your own chess algorithm, use the [chess] tag instead).

Refers to the python-chess library, developed by Niklas Fiekas.

python-chess is a pure Python chess library with move generation, move validation and support for common formats.

This tag should be used only for questions about the python-chess library.

For general questions about chess-playing algorithms, use the tag combined with the tag. If your question is not actually about chess or the algorithms involved, you should not use the tag.

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Extract Moves as Strings from PGN file Using python-chess

I am using the module python-chess (https://python-chess.readthedocs.io/en/latest/index.html) to extract analyze 4 million chess games (http://caissabase.co.uk/). How do I load all moves for a game as strings into a list? The idea is for me to be…
Quentin James
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Why are there different scores when chess.engine analyses a position multiple times in the same script?

beginner programmer here, trying to make an app that detects blunders and wanting to learn more about the chess.engine library. I assume that using the analyse function is a discrete, self-contained process that doesn't rely on cache or memory of…
Vigoxin
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How to track movement of a single chess piece?

I'm using python-chess and I would like to know what is a good way to track movement of let say a black King throughout a single match recorded in pgn format using python-chess. Essentially creating a string of every position it achieved.
JakaKorosak
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How to guess the positions of the queens in a chess game

I recently participated in a programming competition and I was able to answer six out of seven questions in time. the last question was: "take a number from the user and make a chess board by the power of the given number and put as many queens as…
Omid Ketabollahi
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AttributeError: 'NoneType' object has no attribute 'symbol' python-chess

I'm working on rating positions but I don't know if a piece is on a certain square. when I run my code I get AttributeError: 'NoneType' object has no attribute 'symbol' Here is the code: for i in range(0,8): for j in range(0,8): …
Kevin
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How to create a Lichess-like engine-to-player communication API in Python, Python-chess and Flask for my own chess based website?

So, this is for a big college project that I am trying to create a website with the player being able to login, play with an engine (which would run locally on a team mate's PC or a server) then display the output, let the player play moves and…
Kushagra Manish
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Printing remaining clock time per move with the python-chess library

I want to sequentially print the remaining clock time (one string per move at a time) from a game I read (using the python-chess library) from a text file. So, say I have a pgn file with a game that has the following moves... f3 { [%clk 0:05:00] }…
BaDer
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Python Chess: How to stop chess.engine.SimpleEngine.popen_uci() from opening the shell

I'm making my own chess GUI and am using python chess and stockfish for it. After freezing it into an executable, every time I call chess.engine.SimpleEngine.popen_uci('location\\of\\stockfish'), it opens the shell for stockfish and if I close the…
IgnisNoctum
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Python-Chess Import Failed

I am trying to Install python-chess on Ubuntu 16. Installed it via pip3, but getting error while importing chess. ujesh@suyodhana:~$ pip3 install python-chess Collecting python-chess Using cached…
Ujesh Lal
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Integrating chess-svg texture into kivy object

Previously I have had success in integrating bytes of png files into a kivy image using the obj.texture reference. I am currently trying to do this with a chess.svg string but am not having much success. MWE below: # dependencies import kivy from…
Justapigeon
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python-chess returns "none" when the score is like "-M8"

I'm using python 3.6 with Jupyter and Anaconda. The script goes move by move in a chess game from a PGN file, and it returns a score. That works great. The problem comes when the score returned is "-M8", which means black can give checkmate in 8…
JonTargaryen
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How to get a string of the FEN position

After I do import chess board = chess.Board() how can I have a string with the FEN of the position? In other words, how can I extract from board the FEN of the position as a string, with the same output as if I…
3sm1r
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Why only call a private function in a public function?

I was wandering in the source code of the fabulous python-chess library when I saw the following code: def _reset_board(self): # code... def reset_board(self): self._reset_board() The reset_board() function only does one thing, call its…
Null User
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Get clicked chess piece from an SVG chessboard

I am developing a chess GUI in Python 3.6.3 using PyQt5 5.9.1 (GUI framework) and python-chess 0.21.1 (chess library) on Windows 10. I want to get the value of a piece that was clicked on an SVG chessboard (provided by python-chess) so that I can…
Boštjan Mejak
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Slicing and List Copies

I'm in the very early stages of my chess implementation and I'm working on how to move the pawn. The problem is, I can't figure out what is going on with the list slicing! This is my variable board: board = [['R', 'N', 'B', 'Q', 'K', 'B', 'N',…
user6142489
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