ChessRank.org is an independent project and is not affiliated with, endorsed or sponsored by Chess.com, Inc., Lichess or Stockfish. All trademarks are the property of their respective owners.
Analysis runs on Stockfish 19 (stockfish.js), licensed under the GNU GPL v3. Piece sets and sounds are from Lichess; puzzles from the Lichess puzzle database (CC0). Emoji are Microsoft Fluent Emoji (MIT). Player photos (cropped) via Wikimedia Commons: Magnus Carlsen © Andreas Kontokanis (CC BY-SA 2.0), Hikaru Nakamura © Andreas Kontokanis (CC BY-SA 2.0), Levy Rozman © ChesscomRU (CC BY 3.0), Alexandra Botez © Optic Gaming (CC BY 3.0).
Piece sets: Merida © Armando Hernandez Marroquin (GPLv2+), Cburnett © Colin M.L. Burnett (GPLv2+), Maestro © sadsnake1, shading ChessRank.org (CC BY-NC-SA 4.0), Alpha © Eric Bentzen (Freeware), Gioco © sadsnake1 (CC BY-NC-SA 4.0), Kosal © philatype (CC BY 4.0), Tatiana © sadsnake1 (CC BY-NC-SA 4.0), Chessnut © Alexis Luengas (Apache 2.0), Fantasy © Maurizio Monge (MIT), Companion © David L. Brown (Freeware), Spatial © Maurizio Monge (MIT), Pixel © therealqtpi (AGPLv3+), Kiwen Suwi © neverRare (CC BY 4.0).
Usernames are checked against the List of Dirty, Naughty, Obscene, and Otherwise Bad Words (CC BY 4.0), extended with our own list.