Issues

• AtomicBoard: has_legal_en_passant(), generate_legal_ep() and fen() do not use Atomic legality

  niklasf/python-chess#1214 · Filter by author aiorla opened on Sep 30, 2026

• SQUARES_180 is a misleading name

  niklasf/python-chess#1210 · Filter by author jacksonthall22 opened on Sep 4, 2026

• Performance improvements to chess/polyglot.py (5 micro-optimisations)

  niklasf/python-chess#1191 · Filter by author shawnbale opened on Jun 5, 2026
  3

• claim-ahead rejects valid moves that deliver checkmate (or stalemate)

  niklasf/python-chess#1188 · Filter by author dlbbld opened on May 27, 2026
  3

• Get parsed comments from pgn

  niklasf/python-chess#1174 · Filter by author leszekhanusz opened on Nov 26, 2025
  1

• Feature Request: Distinguish between "pre-move" and "post-move" comments in GameNode

  niklasf/python-chess#1171 · Filter by author aslyamov opened on Nov 19, 2025

• Docstring could be more clear

  niklasf/python-chess#1167 · Filter by author Mark799 opened on Oct 27, 2025
  1

• Document info line aggregration

  engine
  niklasf/python-chess#1165 · Filter by author DanijelDomazet opened on Oct 15, 2025
  4

• Feature Request: Interactive Pygame Replay Visualizer

  niklasf/python-chess#1164 · Filter by author Mark799 opened on Oct 12, 2025

• assert while using an UCI program

  bugengine
  niklasf/python-chess#1161 · Filter by author folkertvanheusden opened on Sep 7, 2025
  5

• feautre: json export, PR proposal

  niklasf/python-chess#1159 · Filter by author benedekfazekas opened on Jul 5, 2025
  2

• feature: CachedEngine, useful for tests

  niklasf/python-chess#1157 · Filter by author kraktus opened on Jun 2, 2025

• list(board.pieces(chess.KING, chess.BLACK))[0] IndexError: list index out of range

  niklasf/python-chess#1156 · Filter by author MattisIsEpic opened on May 21, 2025
  1

• Reconsider Cython support as an Optional feature accessible from setup.py

  niklasf/python-chess#1151 · Filter by author Phillyclause89 opened on Apr 26, 2025

• Add ChessMoveHeatmap to #selected-projects of root README

  niklasf/python-chess#1149 · Filter by author Phillyclause89 opened on Apr 25, 2025

• Possible to Support Rendering Coordinates Inside the Chessboard?

  niklasf/python-chess#1145 · Filter by author plutotree opened on Apr 16, 2025
  3

• Getting ChildNode value???

  niklasf/python-chess#1144 · Filter by author oayk23 opened on Apr 9, 2025

• GameBuilder like class that raises errors?

  niklasf/python-chess#1136 · Filter by author Phillyclause89 opened on Jan 26, 2025

• Board.fen() didn't update when ep_square is updated

  question
  niklasf/python-chess#1134 · Filter by author winapiadmin opened on Jan 19, 2025
  2

• Help with PGN to FEN strings with move list

  niklasf/python-chess#1120 · Filter by author atenonai opened on Nov 24, 2024
  1

• AssertionError is thrown if async analysis is cancelled too soon

  bugengine
  niklasf/python-chess#1116 · Filter by author mooskagh opened on Oct 26, 2024
  1

• Can you put my bot in the examples?

  niklasf/python-chess#1111 · Filter by author 42-AH opened on Oct 6, 2024
  1

• Update to have Stockfish 17 Win-Draw-Loss Model

  niklasf/python-chess#1108 · Filter by author MX6464 opened on Sep 23, 2024 · v2.0.0
  4

• BinaryFen in python-chess

  niklasf/python-chess#1099 · Filter by author Torom opened on Jul 22, 2024
  4

• chess.pgn.read_headers inserts empty header entries related to newlines and empty movetext

  niklasf/python-chess#1087 · Filter by author MatijaSi opened on Jun 7, 2024 · v2.0.0
  6