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Credits
Piece sets
| Set | Author | Licence |
| Classic | Colin M.L. Burnett | GPLv2+ |
| Merida | Armando Hernandez Marroquin | GPLv2+ |
| Chessnut | Alexis Luengas | Apache 2.0 |
| Fantasy, Spatial, Celtic | Maurizio Monge | MIT |
Software
- chess.js by Jeff Hlywa, BSD 2-Clause licence: move generation and validation.
Fonts
- Bricolage Grotesque and IBM Plex Sans / Mono, SIL Open Font Licence.
Games
- The grandmaster games are public game records from over-the-board play.