Credits
This site uses openly licensed photos and chess graphics. Thank you to their creators. The site itself is published by the team behind ChessHelper (chesshelper.ai).
Photos
All photos come from Wikimedia Commons and are used under the licenses shown.
| Photo | Author | License |
|---|---|---|
| Plastic chess pieces.jpg | W.carter | CC BY-SA 4.0 |
| Chess Electronique.JPG | Agrillo Mario Me contacter | CC BY-SA 4.0 |
| Chess pieces from Demis Hassabis at Nobel Prize Museum 2024.jpg | Kevin Payravi | CC BY-SA 4.0 |
Chess pieces
Board diagrams use the Celtic piece set by Maurizio Monge, licensed under the MIT License. The favicon is built from the same set's white queen.
Software used for checking
We verify chess lines with Stockfish, licensed under the GPLv3 (source code), and check move legality with chess.js, licensed under the BSD 2-Clause license. Neither runs on this website; they are only used to check what we publish.