ChessKit 0.5.0

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:).

Full Changelog: 0.4.0...0.5.0

ChessKit 0.4.0

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.

Full Changelog: 0.3.2...0.4.0

ChessKit 0.3.2

Fixes

• Made file and rank public properties of Square.

Full Changelog: 0.3.1...0.3.2

ChessKit 0.3.1

Improvements

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

Full Changelog: 0.3.0...0.3.1

ChessKit 0.3.0

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.

Full Changelog: 0.2.0...0.3.0

ChessKit 0.2.0

Added

• 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

Full Changelog: 0.1.2...0.2.0

ChessKit 0.1.2

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

Full Changelog: 0.1.1...0.1.2

ChessKit 0.1.1

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

Full Changelog: 0.1.0...0.1.1

ChessKit 0.1.0

Initial public release.

Main Features

• Represent a chess board, pieces, etc in Swift code
• Parse chess notation such as PGN, FEN, SAN, etc.

Full Changelog: https://github.com/chesskit-app/chesskit-swift/commits/0.1.0