ChessKit 0.13.0

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.

Full Changelog: 0.12.1...0.13.0

ChessKit 0.12.1

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).

Full Changelog: 0.12.0...0.12.1

ChessKit 0.12.0

Improvements

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

Full Changelog: 0.11.0...0.12.0

ChessKit 0.11.0

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.

Full Changelog: 0.10.0...0.11.0

ChessKit 0.10.0

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.

Full Changelog: 0.9.0...0.10.0

ChessKit 0.9.0

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().

Full Changelog: 0.8.0...0.9.0

ChessKit 0.8.0

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).

New Contributors

• @joee-ca made their first contribution in #26
• @TigranSaakyan made their first contribution in #28

Full Changelog: 0.7.1...0.8.0

ChessKit 0.7.1

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

Full Changelog: 0.7.0...0.7.1

ChessKit 0.7.0

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.

New Contributors

• @srushe made their first contribution in #19

Full Changelog: 0.6.0...0.7.0

ChessKit 0.6.0

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.

Full Changelog: 0.5.0...0.6.0