Thanks
Sparring Chess wouldn't be possible without the incredible work of the open-source community and the generous organizations that share their resources freely.
Lichess.org
We extend our deepest gratitude to Lichess for creating one of the most incredible chess platforms in the world, completely free and open-source.
Sparring Chess uses the Lichess Opening Explorer API to provide sparring moves based on real game statistics. This powerful database contains millions of games and allows us to show you the moves that players at your rating level actually play in your positions.
The Lichess team has built something truly special: a world-class chess server that respects its users, shares its code, and provides its data freely. Their commitment to the chess community is an inspiration.
Stockfish
The analysis engine powering our position evaluation is Stockfish, the strongest open-source chess engine in the world. Thanks to the Stockfish team and the countless contributors who have made it possible to run this incredible engine directly in your browser.
Chess.js & Chessground
Our interactive chess board is powered by Chessground, the beautiful and performant board library developed by Lichess. Move validation and game logic are handled by Chess.js.
The Open-Source Community
Thank you to all the developers, designers, and chess enthusiasts who contribute to open-source projects. Your work makes tools like Sparring Chess possible.
Our Users
Finally, thank you to everyone who uses Sparring Chess. Your feedback, bug reports, and feature suggestions help us improve and build a better training tool for the chess community.