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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) 2012-2023 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.

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 license, 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)

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 Google 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.png 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/images/flags Go Squared Ltd. MIT
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/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/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/libra 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/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

Exceptions (non-free)

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/fantasy Maurizio Monge "give credit in a suitable way"
public/piece/leipzig Armando Hernandez Marroquin "freeware"
public/piece/spatial Maurizio Monge "give credit in a suitable way"
public/piece/reillycraig Reilly Craig
public/piece/riohacha
public/piece/celtic Maurizio Monge "give credit in a suitable way"
public/images/staunton/piece/Staunton Eden Murs (?)
  • 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: