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# Copying Lila
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) 2012-2021 the lila authors.
For a list of the authors see the commit log or
https://github.com/ornicar/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_.
## Additional permission under GNU AGPL version 3 section 7
If you modify this Program, or any covered work, by linking or combining it
with Highcharts (or a modified version of that library), containing parts
covered by the terms of the _Creative Commons (CC) Attribution-NonCommercial_
licence, the licensors of this Program grant you additional permission to
convey the resulting work. Corresponding Source for a non-source form of such a
combination shall include the source code for the parts of Highcharts used as
well as that of the covered work.
## Exceptions (free)
<!-- prettier-ignore -->
Files | Author(s) | License
--- | --- | ---
public/font/lichess.{sfd,woff,woff2} | [Dave Gandy](http://fontawesome.io/), [GitHub](https://github.com/primer/octicons), [Webalys](http://www.webalys.com/), [Zurb](http://zurb.com/playground/foundation-icon-fonts-3), [Daniel Bruce](http://www.entypo.com/), [Shapemade](http://steadysets.com/), [Sergey Shmidt](http://designmodo.com/linecons-free/) and the Lichess authors | [OFL](http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL), [MIT](https://github.com/primer/octicons/blob/master/LICENSE), [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/), AGPLv3+
public/font/lichess.chess.{sfd,woff,woff2} | the [pgn4web](http://pgn4web.casaschi.net/home.html) authors | [GPLv2+](https://www.gnu.org/licenses/gpl-2.0.txt)
Noto Sans in public/font | [Google](https://fonts.google.com/specimen/Noto+Sans) | [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0)
Roboto in public/font | [Christian Robertson](https://fonts.google.com/specimen/Roboto) | [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0)
Segment7 in public/font | [Cedders](https://www.fontspace.com/cedders) | [SIL Open Font License](https://www.fontspace.com/help#license-17)
public/piece/horsey, public/images/emoji/horsey.png | cham, michael1241 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/images/staunton | [James Clarke](https://github.com/clarkerubber/Staunton-Pieces) | [MIT](https://github.com/clarkerubber/Staunton-Pieces/blob/master/LICENSE)
public/images/staunton/piece/CubesAndPi | CubesAndPi | AGPLv3+
public/images/trophy | [James Clarke](https://github.com/clarkerubber/Staunton-Pieces/tree/master/Trophies) | [MIT](https://github.com/clarkerubber/Staunton-Pieces/blob/master/LICENSE)
public/images/flags | [Go Squared Ltd.](https://www.gosquared.com/resources/flag-icons/) | [MIT](https://github.com/gosquared/flags/blob/master/LICENSE.txt)
public/images/board | the lila authors and [pirouetti](https://lichess.org/@/pirouetti) | AGPLv3+
public/images/learn/pieces | Thibault Duplessis and [Colin M.L. Burnett](https://en.wikipedia.org/wiki/User:Cburnett) | [GPLv2+](https://www.gnu.org/licenses/gpl-2.0.txt)
public/piece/mono | Thibault Duplessis and [Colin M.L. Burnett](https://en.wikipedia.org/wiki/User:Cburnett) | [GPLv2+](https://www.gnu.org/licenses/gpl-2.0.txt)
public/piece/cburnett | [Colin M.L. Burnett](https://en.wikipedia.org/wiki/User:Cburnett) | [GPLv2+](https://www.gnu.org/licenses/gpl-2.0.txt)
public/piece/chessnut | [Alexis Luengas](https://github.com/LexLuengas) | [Apache 2.0](https://github.com/LexLuengas/chessnut-pieces/blob/master/LICENSE.txt)
public/piece/letter | [usolando](https://lichess.org/@/usolando) | AGPLv3+
public/piece/pirouetti | [pirouetti](https://lichess.org/@/pirouetti) | AGPLv3+
public/piece/merida | Armando Hernandez Marroquin | [GPLv2+](https://www.gnu.org/licenses/gpl-2.0.txt)
public/piece/shapes | [flugsio](https://github.com/flugsio/chess_shapes) | [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
public/piece/pixel | [therealqtpi](https://twitter.com/therealqtpi) | AGPLv3+
public/piece/california | [Jerry S.](https://sites.google.com/view/jerrychess/home) | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/maestro | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/fresca | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/cardinal | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/icpieces | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/gioco | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/tatiana | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/staunty | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/dubrovny | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/piece/libra | sadsnake1 | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
public/sounds/futuristic | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
public/sounds/nes | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
public/sounds/piano | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
public/sounds/sfx | [Enigmahack](https://github.com/Enigmahack) | AGPLv3+
public/sounds/lisp | [EdinburghCollective](http://lichess.org/@/EdinburghCollective) | [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
## Exceptions (non-free)
<!-- prettier-ignore -->
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](http://www.enpassant.dk/chess/downl/alpha.zip))
public/piece/chess7 | [Style-7](http://www.styleseven.com/) | "freeware"
public/piece/companion | David L. Brown | ["freeware"](http://www.enpassant.dk/chess/fonteng.htm#GC)
public/piece/fantasy | [Maurizio Monge](http://poisson.phc.unipi.it/~monge/chess_art.php) | "give credit in a suitable way"
public/piece/leipzig | Armando Hernandez Marroquin | ["freeware"](http://www.enpassant.dk/chess/fonteng.htm#LEIPZIG)
public/piece/spatial | [Maurizio Monge](http://poisson.phc.unipi.it/~monge/chess_art.php) | "give credit in a suitable way"
public/piece/reillycraig | [Reilly Craig](https://instagram.com/fader_) |
public/piece/riohacha | |
public/images/staunton/piece/Staunton | [Eden Murs](https://userstyles.org/styles/134558/lichess-pieces-3d-staunton) (?) |
- The other sounds in public/sound.
- The other artwork in public/images.
## External services
Lichess as deployed on https://lichess.org/ also uses these external services:
- [Cloudflare](https://www.cloudflare.com/) to serve static assets, DNS lookups for email validation
- [prismic.io](https://prismic.io/) for help/documentation pages and the blog
- [twitch](https://www.twitch.tv/) for featured livestreams
- [YouTube](https://www.youtube.com) for featured livestreams and the [Video library](https://lichess.org/video)
- [stripe](https://stripe.com/) and [PayPal](https://www.paypal.com) for [Patron donations](https://lichess.org/patron)
- [openexchangerates.org](https://openexchangerates.org/) for donations in local currencies
- [Spreadshirt](https://shop.spreadshirt.com/lichess-org) for the [Swag store](https://lichess.org/swag)
- [mailcheck.p.rapidapi.com](https://rapidapi.com/Top-Rated/api/e-mail-check-invalid-or-disposable-domain)
- [Amazon SES](https://aws.amazon.com/ses/) for transactional email
- [check.torproject.org](https://check.torproject.org/torbulkexitlist) for a list or Tor exit nodes
- [detectlanguage.com](https://detectlanguage.com/)
- [Google Cloud Messaging](https://developers.google.com/cloud-messaging/) for mobile notifications
- [hCaptcha](https://hcaptcha.com)
- [PeerJS](https://peerjs.com/) for voice chat
- [crowdin](https://crowdin.com/project/lichess) for localization
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