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ChessKit 0.13.0

Released Thursday, October 3, 2024.

New Features

  • BoardDelegate now notifies when king is in check, and provides the color of the checked king, see Issue #38.
  • Move.checkState and Move.disambiguation are now publicly accessible, see Issue #38.

Technical Changes

  • Enable Swift 6 language mode package-wide.
  • Game and MoveTree are now Sendable types.

ChessKit 0.12.1

Released Wednesday, September 11, 2024.

Bug Fixes

  • Fix MoveTree.fullVariation(for:) returning blank array when .minimum is passed as the index.
    • If this index is passed, it will automatically start from the next (valid) index and return the moves for that index.
    • In practice this will mean the main variation will be returned (starting from white's first move).

ChessKit 0.12.0

Released Wednesday, August 21, 2024.

Improvements

  • Conform more types to Hashable such as Game and MoveTree.
  • Game.Tag now publicly exposes name.
  • Game.Tags is now Hashable and Sendable.

ChessKit 0.11.0

Released Monday, August 5, 2024.

New Features

  • A draw result is now published by BoardDelegate when the board encounters a threefold repetition (by @joee-ca).
  • Convenience directional properties added to Square such as up, down, left, and right to obtain squares in relation to the given Square.

Bug Fixes

  • File.init(_ number: Int) now correctly bounds invalid values.
    • i.e. Values less than 1 become File.a and values greater than 8 become File.h.

Technical Changes

  • Test coverage has been improved.
  • Parsers (EngineLANParser, FENParser, PGNParser, SANParser) have been converted from classes to caseless enums.
    • This should have no effect on existing code since the class versions had private initializers.

ChessKit 0.10.0

Released Friday, June 21, 2024.

Improvements

  • Update tools version to Swift 5.9 (requires Xcode 15.0 or greater).
  • Conform to Swift strict concurrency and add Sendable conformance to most objects

Breaking Changes

  • Game is now a struct and no longer conforms to ObservableObject.
    • If observation semantics are required, consider using didSet property observers or an object that utilizes the @Observable macro.

ChessKit 0.9.0

Released Saturday, June 15, 2024.

Improvements

  • MoveTree now conforms to BidirectionalCollection, allowing for more standard collection-based semantics in Swift.
    • Should not affect any existing functionality or API usage.
    • Several methods on MoveTree have been deprecated in favor of their Collection counterparts:
      • previousIndex(for:) → index(before:) / hasIndex(before:)
      • nextIndex(for:) → index(after:) / hasIndex(after:)
      • move(at:) → subscript(_:) (e.g. tree[index])
  • MoveTree.annotate() now optionally returns the Move object after annotation.
  • MoveTree.path() now returns tuple with named parameters (direction and index).

Bug Fixes

  • Removed CustomDebugStringConvertible conformance from Bitboard to avoid affecting all UInt64 debug prints.
    • To print the string representation of Bitboard use Bitboard.chessString().

ChessKit 0.8.0

Released Friday, June 7, 2024.

Improvements

  • Add support for draw by insufficient material (by @joee-ca).
    • Once this condition is reached .draw(.insufficientMaterial) will be published via the BoardDelegate.didEnd(with:) method.
  • Add unicode variant selector when printing black pawn icon to avoid displaying emoji (by @joee-ca).

Bug Fixes

  • Fix issue where king could castle through other pieces (by @TigranSaakyan).

ChessKit 0.7.1

Released Monday, May 6, 2024.

  • Fix MoveTree.previousIndex(for:) when provided index is one after minimumIndex.

ChessKit 0.7.0

Released Monday, April 29, 2024.

Improvements

  • Add startingIndex and startingPosition to Game.
    • startingIndex takes into account the sideToMove of startingPosition.

Bug Fixes

  • Fix rare en passant issue that could allow the king to be left in check, see Issue #18.

ChessKit 0.6.0

Released Friday, April 19, 2024.

Improvements

  • Enable chesskit-swift to run on oldest platform possible without code changes.
    • Now works on iOS 13+, macOS 10.15+, tvOS 13+, watchOS 6+.
  • Annotations on moves in the MoveTree can now also be updated via Game.annotate(moveAt:assessment:comment:).

Bug Fixes

  • Fix MoveTree not properly publishing changes via Game.
  • Fix Board.EndResult.repetition spelling.
    • This isn't made available yet but will be implemented in an upcoming release.

ChessKit 0.5.0

Released Sunday, April 14, 2024.

Improvements

  • PGN parsing now supports tag pairs (for example [Event "Name"]) located at the top of the PGN format, see Issue #8.

Bug Fixes

  • Fix issue where king is allowed to castle in check, see Issue #11.

Breaking Changes

  • Remove color parameter from Move.init(san:color:position:) initializer.
    • It was not being used, can be removed from any initializer call where it was included.
    • The new initializer is simply Move.init(san:position:).

ChessKit 0.4.0

Released Saturday, April 13, 2024.

Improvements

  • Board move calculation and validation performance has greatly increased.
    • Performance has improved by over 250x when simulating a full game using Board.
    • Underlying board representation has been replaced with much faster bitboard structures and algorithms.
  • Add CustomStringConvertible conformance to Board and Position to allow for printing chess board representations, useful for debugging.
  • Add ChessKitConfiguration with static configuration properties for the package.
    • Currently the only option is printMode to determine how pieces should be represented when printing Board and Position objects (see previous item).

Breaking Changes

  • EnPassant has been made an internal struct. It is used interally by Position and Board.

Deprecations

  • Position.toggleSideToMove() is now private and handled automatically when calling move(). The public-facing toggleSideToMove() has been deprecated.

ChessKit 0.3.2

Released Saturday, December 2, 2023.

Fixes

  • Made file and rank public properties of Square.

ChessKit 0.3.1

Released Friday, November 24, 2023.

Improvements

  • Add CaseIterable conformance to several Piece and Square enums:
    • Piece.Color
    • Piece.Kind
    • Square.Color

ChessKit 0.3.0

Released Wednesday, June 21, 2023.

New Features

  • Add future(for:) and fullVariation(for:) methods to MoveTree.
    • future(for:) returns the future moves for a given index.
    • fullVariation(for:) returns the sum of history(for:) and future(for:).

Improvements

  • Simplify PGNElement to just contain a single .move case.
    • i.e. .whiteMove and blackMove have been removed and consolidated.

Fixes

  • Fix behavior of previousIndex(for:) and nextIndex(for:) in MoveTree.
    • Especially when the provided index is equal to .minimum.

ChessKit 0.2.0

Released Wednesday, May 31, 2023.

New Features

  • MoveTree and MoveTree.Index objects to track move turns and variations.

    • Game.moves is now a MoveTree object instead of [Int: MovePair]
    • MoveTree.Index includes piece color and variation so it can be used to directly identify any single move within a game
    • Use the properties and functions of MoveTree to retrieve moves within the tree as needed

  • make(move:index:) and make(moves:index:) with ability to make moves on Game with SAN strings for convenience

    • For example: game.make(moves: ["e4", "e5"])

  • PGNParser.convert(game:) now returns the PGN string for a given game, including variations.

    • Note: PGNParser.parse(pgn:) still does not work with variations, this is coming in a future update.

  • Game.positions is now public

    • Contains a dictionary of all positions in the game by MoveTree.Index, including variations

Removed

  • Game.annotateMove
    • Modify Move.assessment and Move.comment directly instead
  • MovePair
    • Use Move in conjuction with MoveTree.Index to track move indicies
  • color parameter from SANParser.parse()
    • The color is now obtained from the sideToMove in the provided position

ChessKit 0.1.2

Released Thursday, May 11, 2023.

  • Add documentation for all public members
  • Add default starting position for Game initializer
  • Add ability to annotate moves via Game

ChessKit 0.1.1

Released Wednesday, April 12, 2023.

  • Downgrade required Swift version to 5.7
    • Allows use with Xcode 14.2 on GitHub Actions

ChessKit 0.1.0

Released Tuesday, April 11, 2023.

  • Initial release