Changelog for python-chess¶
New in v1.3.1¶
Bugfixes:
chess.pgn.read_game()
now properly detects variant games with Chess960 castling rights (as well as mislabeled Standard Chess960 games). Previously all castling moves in such games were rejected.
New in v1.3.0¶
Changes:
Introduced
chess.pgn.ChildNode
, a subclass ofchess.pgn.GameNode
for all nodes other than the root node, and convertedchess.pgn.GameNode
to an abstract base class. This improves ergonomics in typed code.The change is backwards compatible if using only documented features. However, a notable undocumented feature is the ability to create dangling nodes. This is no longer possible. If you have been using this for subclassing, override
GameNode.add_variation()
instead ofGameNode.dangling_node()
. It is now the only method that creates child nodes.
Bugfixes:
Removed broken
weakref
-based caching inchess.pgn.GameNode.board()
.
New features:
Added
chess.pgn.GameNode.next()
.
New in v1.2.1¶
Changes:
The primary location for the published package is now https://pypi.org/project/chess/. Thanks to Kristian Glass for transferring the namespace.
The old https://pypi.org/project/python-chess/ will remain an alias that installs the package from the new location as a dependency (as recommended by PEP423).
ModuleNotFoundError: No module named 'chess'
after upgrading from previous versions? Runpip install --force-reinstall chess
(due to https://github.com/niklasf/python-chess/issues/680).
New in v1.2.0¶
New features:
Added
chess.Board.ply()
.Added
chess.pgn.GameNode.ply()
andchess.pgn.GameNode.turn()
.Added
chess.engine.PovWdl
,chess.engine.Wdl
, and conversions from scores:chess.engine.PovScore.wdl()
,chess.engine.Score.wdl()
.Added
chess.engine.Score.score(*, mate_score: int) -> int
overload.
Changes:
The
PovScore
returned bychess.pgn.GameNode.eval()
is now always relative to the side to move. The ambiguity around[%eval #0]
has been resolved toMate(-0)
. This makes sense, given that the authors of the specification probably had standard chess in mind (where a game-ending move is always a loss for the opponent). Previously, this would be parsed asNone
.Typed
chess.engine.InfoDict["wdl"]
as the newchess.engine.PovWdl
, rather thanTuple[int, int, int]
. The new type is backwards compatible, but it is recommended to use its documented fields and methods instead.Removed
chess.engine.PovScore.__str__()
. String representation falls back to__repr__
.The
en_passant
parameter ofchess.Board.fen()
andchess.Board.epd()
is now typed asLiteral["legal", "fen", "xfen"]
rather thanstr
.
New in v1.1.0¶
New features:
Added
chess.svg.board(..., orientation)
. This is a more idiomatic way to set the board orientation thanflipped
.Added
chess.svg.Arrow.pgn()
andchess.svg.Arrow.from_pgn()
.
Changes:
Further relaxed
chess.Board.parse_san()
. Now accepts fully specified moves likee2e4
, even if that is not a pawn move, castling notation with zeros, null moves in UCI notation, and null moves in XBoard notation.
New in v1.0.1¶
Bugfixes:
chess.svg
: Restored SVG Tiny compatibility by splitting colors like#rrggbbaa
into a solid color and opacity.
New in v1.0.0¶
See CHANGELOG-OLD.rst
for changes up to v1.0.0.