COPYING.md
Any file in this project that does not state otherwise and is not listed as an exception below is part of lila and copyright (c) 2012-2026 the lila authors.
For a list of the authors see the commit log or https://github.com/lichess-org/lila/graphs/contributors.
Lila is free software; you can redistribute and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
Lila is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
See the LICENSE file for a copy of the GNU Affero General Public License.
| Files | Author(s) | License |
|---|---|---|
| public/font/lichess.{sfd,woff,woff2} | Dave Gandy, GitHub, Webalys, Zurb, Daniel Bruce, Shapemade, Sergey Shmidt and the Lichess authors | OFL, MIT, CC BY 3.0, AGPLv3+ |
| public/font/lichess.chess.{sfd,woff,woff2} | the pgn4web authors | GPLv2+ |
| Noto Sans in public/font | Apache 2.0 | |
| Roboto in public/font | Christian Robertson | Apache 2.0 |
| Segment7 in public/font | Cedders | SIL Open Font License |
| public/piece/horsey, public/images/emoji/horsey.webp | cham, michael1241 | CC BY-NC-SA 4.0 |
| public/images/staunton | James Clarke | MIT |
| public/images/staunton/piece/CubesAndPi | CubesAndPi | AGPLv3+ |
| public/images/trophy | James Clarke | MIT |
| public/flags | Go Squared Ltd. | MIT |
| public/flags/ES-AN.png | Miguillen | CC-BY-SA 4.0 |
| public/flags/PT-30.png | Brian Boru, Nuno Tavares | CC-BY-SA 1.0 |
| public/images/board | the lila authors and pirouetti | AGPLv3+ |
| public/images/learn/pieces | Thibault Duplessis and Colin M.L. Burnett | GPLv2+ |
| public/piece/mono | Thibault Duplessis and Colin M.L. Burnett | GPLv2+ |
| public/piece/cburnett | Colin M.L. Burnett | GPLv2+ |
| public/piece/chessnut | Alexis Luengas | Apache 2.0 |
| public/piece/letter | usolando | AGPLv3+ |
| public/piece/pirouetti | pirouetti | AGPLv3+ |
| public/piece/merida | Armando Hernandez Marroquin | GPLv2+ |
| public/piece/shapes | flugsio | CC BY-SA 4.0 |
| public/piece/pixel | therealqtpi | AGPLv3+ |
| public/piece/rhosgfx | RhosGFX | CC0 1.0 |
| public/piece/california | Jerry S. | CC BY-NC-SA 4.0 |
| public/piece/caliente | avi | CC BY-NC-SA 4.0 |
| public/piece/maestro | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/fantasy | Maurizio Monge | MIT |
| public/piece/spatial | Maurizio Monge | MIT |
| public/piece/celtic | Maurizio Monge | MIT |
| public/piece/fresca | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/cardinal | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/icpieces | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/gioco | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/tatiana | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/staunty | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/dubrovny | sadsnake1 | CC BY-NC-SA 4.0 |
| public/piece/anarcandy | caderek | CC BY-NC-SA 4.0 |
| public/piece/disguised | danegraphics | CC BY-NC-SA 4.0 |
| public/piece/kiwen-suwi | neverRare | CC BY 4.0 |
| public/piece/mpchess | Maxime Chupin | GPL3v3+ |
| public/piece/cooke | fejfar | CC BY-NC-SA 4.0 |
| public/piece/monarchy | slither77 | CC BY-NC-SA 4.0 |
| public/piece/xkcd | Randall Munroe | CC BY-NC-SA 2.5 |
| public/piece/Firi | James Faure | CC BY 4.0 |
| public/sounds/futuristic | Enigmahack | AGPLv3+ |
| public/sounds/nes | Enigmahack | AGPLv3+ |
| public/sounds/piano | Enigmahack | AGPLv3+ |
| public/sounds/sfx | Enigmahack | AGPLv3+ |
| public/sounds/lisp | EdinburghCollective | CC BY-NC-SA 4.0 |
| SVG in ui/learn/src/apple.ts | Sensa | CC0 1.0 |
| public/flair/img/symbols.neovim-mark.webp | Jason Long | CC BY 3.0 (Modified by converting to webp and resizing) |
| public/images/practice/* game-icons.net CC BY 3.0 | ||
| public/images/puzzle-themes/* game-icons.net CC BY 3.0 | ||
| translation/source/puzzleTheme.xml | the lila authors and contributors | CC0 1.0 |
| Files | Author(s) | License |
|---|---|---|
| public/logo, public/favicon.ico, public/apple-touch-icon.png | sadsnake1 | Only use to refer to lichess.org |
| public/piece/alpha | Eric Bentzen | "free for personal non commercial use" (see zip) |
| public/piece/chess7 | Style-7 | "freeware" |
| public/piece/companion | David L. Brown | "freeware" |
| public/piece/leipzig | Armando Hernandez Marroquin | "freeware" |
| public/piece/reillycraig | Reilly Craig | |
| public/piece/riohacha | ||
| public/images/staunton/piece/Staunton | Eden Murs (?) | |
| public/piece/shahi-ivory-brown | Tamer Karatekin | Free for personal and commercial use, but non-derivative non-modify license (Şahî Chess & Shatranj Font License v1.0 – https://github.com/TamerKaratekin/shahi-chess-shatranj-font/blob/main/LICENSE.txt) |
Lichess as deployed on https://lichess.org/ also uses these external services: