lyuji282/chess

:sushi: Wasabi Chess Engine - written in AssemblyScript

🍣 Wasabi Chess Engine

Wasabi Chess runs as a Web App in the browser and is also available as a standalone UCI chess engine.

Play here!

The Web App embeds the engine using Web Workers to compute the AI moves in the background without blocking the main thread for the UI.

Features

• Chess engine implemented in AssemblyScript
• Computer opponent with 6 difficulty levels
• Opening Database for varied gameplay
• Move history to undo player moves
• Drag'n'Drop support to move chess pieces
• Touch support for mobile devices

UCI Engine

Wasabi Chess can be downloaded from the Releases page as a standalone UCI Engine.

The engine was tested with cutechess-cli and PyChess on Linux and Arena on Windows, but should also work with other UCI compatible clients.

Please note that the UCI engine currently has the following limitations:

• no support for pondering during opponent turns
• no multi-threading support
• ongoing searches cannot be cancelled

In order to run the engine outside a Browser environment, a WebAssembly Runtime like for example WAVM or Wasmer is required. The assets on the Releases page already bundle the very fast WAVM runtime.

Built With

• AssemblyScript - for the engine
• as-pect - to test the engine
• react - for the user interface
• react-dnd - for Drag and Drop support
• styled-components - to style React components in JS
• react-fontawesome - to add font icons
• workerize-loader - to load modules as Web Workers

License

This project is licensed under the GNU General Public License - see the LICENSE for details.

Attributions

• Images for the chess pieces come from Wikimedia Commons
• The opening book was generated from a selection of chess games from the FICS Games Database