Credits

This product is built on open-source software and open data. Thank you to their authors.

• Stockfish (GPL-3.0) — Engine analysis (run as a separate program on our servers).
• Lichess chess-openings (CC0-1.0) — Opening names and ECO codes.
• cm-chessboard (MIT) — Interactive board and piece set.
• chess.js (BSD-2-Clause) — Move notation in the browser.
• Apache ECharts (Apache-2.0) — Charts.
• TanStack Query, Table and Virtual (MIT) — Data loading and tables.
• Lucide (ISC) — Icons.