ChessKitEngine 0.7.0

Improvements

• Commands and responses are now logged using their own synchronous queue to prevent unreadable output when commands and responses were sent simultaneously.
• setLoggingEnabled(loggingEnabled:) has been renamed set(loggingEnabled:) async.
  • The original function remains but is deprecated.
• Change default coreCount in Engine.start() to one less than the device's core count (minimum of 1).
  • This allows a free core for other processing tasks in a multicore environment.
  • Can still be changed with the coreCount parameter if desired.
• Engine now automatically stops related processes when it is deinitialized.

Full Changelog: 0.6.0...0.7.0

ChessKitEngine 0.6.0

Breaking Changes

• ChessKitEngine now supports Swift 6 concurrency (by @Amir-Zucker).
  • Starting and stopping engine, as well as sending commands must now be done using async/await.

New Contributors

• @Amir-Zucker made their first contribution in #21

Full Changelog: 0.5.0...0.6.0

ChessKitEngine 0.5.0

Engine Upgrades

• Update to Stockfish 17.
  • See new recommended NNUE files EvalFile and EvalFileSmall
• Update to LeelaChessZero 0.31.1.

Improvements

• Engine.type is now exposed publicly.

Full Changelog: 0.4.1...0.5.0

ChessKitEngine 0.4.1

Bug Fixes

• Fix issue where engine responses containing a newline character would not be parsed correctly.

Full Changelog: 0.4.0...0.4.1

ChessKitEngine 0.4.0

Engine Upgrades

• Update to Stockfish 16.1.
  • ⚠️ Stockfish now requires EvalFile and EvalFileSmall options to be set after launch, with a path to the *.nnue files provided.
  • Currently chesskit-engine assumes nn-baff1ede1f90.nnue, nn-b1a57edbea57.nnue are available in your app's Bundle.main.
  • Click the file names in the previous line to access the download pages.
  • Any other files can be added via .setoption(id:value:) engine commands.
• Update to LeelaChessZero 0.30.
  • ⚠️ Lc0 requires WeightsFile options to be set after launch, with a path to a neural network file provided.
  • Currently chesskit-engine assumes 192x15_network is available in your app's Bundle.main.
  • Network files can be downloaded from lczero.org.
  • Any other files can be added via .setoption(id:value:) engine commands.
  • Currently there are some performance issues using lc0 in an app; this is being investigated but any contributions (via PRs or issues) are appreciated.

Improvements

• Engine.start() now takes a completion handler.
  • This is called once the engine has finished initializing.
  • Engine commands (i.e. setting options or requesting evaluations) should not be sent until this completion handler is called.
• EngineMessenger now sends commands to the engines via stdin, see Issue #11.
  • This will allow for much simpler upgrades to existing engines, as well as the inclusion of new engines in the future.
  • Special thanks @dehlen.

Full Changelog: 0.3.0...0.4.0

ChessKitEngine 0.3.0

Improvements

• Add background engine processing for better performance.
• Remove neural network resource files for greatly reduced package size.
  • These can be added manually by bundling the desired files and setting the appropriate engine to use them (see Resources directory).
  • For Stockfish 15.1 (nn-1337b1adec5b.nnue):

    engine.send(command: .setoption(id: "EvalFile", value: evalFileURL))
    engine.send(command: .setoption(id: "Use NNUE", value: "true"))

  • For LeelaChessZero 0.29 (192x15_network):

    engine.send(command: .setoption(id: "WeightsFile", value: weightsFileURL))

Full Changelog: 0.2.2...0.3.0

ChessKitEngine 0.2.2

• Replaced submodule URLs with HTTPS instead of SSH

Full Changelog: 0.2.1...0.2.2

ChessKitEngine 0.2.1

Improvements

• Removed unsafe flags from Package.swift

Full Changelog: 0.2.0...0.2.1

ChessKitEngine 0.2.0

New Features

• Add LeelaChessZero (lc0) engine
  • Currently comes bundled with a neural network weights file 192x15_network

Improvements

• Engine initializer no longer has a default engineType (previously .stockfish)
  • Type must be specified using Engine(type: <engine type>)
• Add Stockfish EvalFile as Swift package resource

Full Changelog: 0.1.3...0.2.0

ChessKitEngine 0.1.3

Improvements

• Add default nil value for value parameter in EngineCommand.setoption(id:value:)

Bug Fixes

• Fix loggingEnabled default value to match documentation
• Fix EngineCommand.PositionString(rawValue:) when passing a FEN string

Technical Improvements

• Simplify internal Obj-C and C++ targets
• Increase test coverage

Full Changelog: 0.1.2...0.1.3