Open Source TypeScript Chess Engines

En Croissant is a free, open-source chess toolkit designed for studying games, analyzing positions, and developing opening repertoires. It provides a customizable graphical interface for working with chess engines and game databases. Users can import and analyze games from Lichess and Chess.com. The software supports multiple UCI-compatible engines, allowing detailed evaluation of positions and candidate moves. Its repertoire builder helps players organize opening variations and practice them through spaced repetition. Database tools allow searching for complete or partial board positions. En Croissant also simplifies installing and managing engines and chess databases. Built with Tauri, Rust, and React, it offers a cross-platform environment for chess training and analysis.