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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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129 questions
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Creating more than one row in a CSV file/Chess database creation

I am trying to create a database to train a basic machine learning algorithm off of. However, when I run the code, it only creates two rows, but I am trying to create multiple rows, of each individual position in the game, accompanied by a stockfish…
Thayer
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Python-chess: module 'chess.engine' has no attribute 'SimpleEngine'

This is part of a larger project, but I created a new file to solve this one problem. Sorry, I am still new to coding. Currently, I am trying to get stockfish evaluations for positions in Chess, however whenever I try to run the code, I get…
Thayer
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How can I manipulate this chess notation with python?

I'm trying to use some chess related libraries in python (e.g. chessnut and chess) and they use the following notation r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 4 I've searched about it and didn't find anything. How can I…
Giraffes are Fake
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How do I get python-chess SVG rendering working in Google Colab?

I'm trying to get this code sample from python-chess SVG rendering working. import chess import chess.svg chess.svg.piece(chess.Piece.from_symbol("R")) When I run the code, I get the following HTML output, but not the image of a white rook.
Hal Heinrich
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convert pgn database to pandas dataframe

Helo! Using chess.pgn to convert a Chess database into a dataframe, to read the nth game from the database do I need to read all the previous ones first? I can't jump directly to the game n? If I want to distribute the processing in a database with…
Hick Nax
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What is game state Moves evaluation in chess? why is stockfish API with python giving me rubbish evaluations

I am analyzing a chess game PGN File. I used the stockfish 13 API to perform game moves Analysis but, the engine is computing some rubbish evaluation scores. the same game gets an evaluation close to 0 for e2e4. but the output of my python code…
skwolvie
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python chess module doesn't work properly on google colab

I am using the python chess module in a google colab notebook. Specifically, I am running three commands related to this…
BLEB
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add variations/nodes to games in python-chess

I'm trying to build a chess engine by using the "python-chess"-package My problem is that I want to add variations to games, so I used the method: add_variation(move: chess.Move, *, comment: str = '', starting_comment: str = '', nags: Iterable[int]…
laserbuddha
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Python-Chess board.is_checkmate, .is_stalemate, .is_en_passant, .is_check Always Returning True

Just downloaded the Python-Chess module and wanted to test it out; whenever I check the board state by using board.is_checkmate, board.is_stalemate, board.is_check, board.is_en_passant and a print statement, it always returns true. I'm using VSCode…
Ariel
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How to extract black and white moves separately from a Portable Game Notation (PGN) file?

I would like to extract the white moves and black moves made in a chess game seperately, by analyzing the PGN (Portable Game Notation) file, using Python. Example: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3 Be7 8. Nc3 O-O 9.…
Kapil Gund
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Get Location of Piece in Python-Chess

I am currently building a chess game using Python-Chess, and I am trying to use the SVG module to generate SVG images of the board. One of the parameters for generating an svg is check (here), which is a "square to be marked indicating a check".…
Krishnan Shankar
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Why are logical shifts used when representing a chess board for a Deep Learning task?

Recently I came across a twitch streamer who was working on his own Deep Learning based chess engine. I was going through the code I saw in the video and one thing I didn't quite understand was why he used logical shifts when he was preparing the…
cru3lgenius
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in python-chess library: "white_clock, white_inc black_clock, black_inc" is internally managed by library? or i need to update it myself?

I'm working with python-chess library, i need to know in python-chess library: "white_clock, white_inc black_clock, black_inc" is internally managed by library? or i need to update it myself? i have a code like this: limit =…
Abdul.Moqueet
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How do i get the played move by comparing two different fens?

So I have two fens. One gotten before the move and one after. How can I get the played move by comparing these 2 fens to each other and returning the answer in uci or any other format. I am using the python-chess library so maybe there is a way to…
Fancy129
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How to promote a pawn?

I put a FEN where on the next move White can promote a pawn by moving b7a8. In the library that I currently use (and that I want to replace). When doing this type of action, it returns a type of error so you ask why and then you get the indication…
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