Lichess (/'liː-tʃɛs/ (help·info)) is an Internet chess server. Anyone can play anonymously, although players may register an account on the site to play rated games. All features are available for free, as the site is funded by donations.
Type of site
|Internet chess server|
|Created by||Thibault Duplessis|
|Alexa rank||1,268 (February 2019[update])|
|Commercial||Non-profit and donation-only|
|Launched||20 June 2010|
As of February 10, 2019, lichess.org had a global rank of 1,268 at Alexa, with most of its visitors coming from the United States, United Kingdom, Germany, Russia, and Canada. According to the Alexa rank, Lichess is ranked second only to Chess.com as one of the most popular online chess servers in the world.
Being ad-free, Lichess relies on donated money to maintain over a dozen servers with over a hundred processor cores while paying programmers.
The website allows users to play games of live and correspondence chess against other players at different time controls. It has training features, including chess basics, tactics training, chess coordinates, chess video library, Chess insights, opener explorer, and studies. It also has a section where chess coaches can advertise their services to users.
- Antichess (Losing chess)
- Atomic chess
- Chess960 (Fischer Random Chess)
- Crazyhouse 
- Horde (a variant of Dunsany's chess)
- King of the Hill
- Racing Kings
- Three-check chess
Users can also play games against the Stockfish chess engine at a number of difficulty levels. They may also analyze specific positions from standard chess or any of the supported chess variants. The website implements a version of the Stockfish engine that runs on the user's local machine within the user's web browser for limited or infinite analysis, which will calculate best lines of play or major opponent threats. An opening book based on games played on the site or a database of two million games played by FIDE titled players is available. In Antichess variant, users can switch for Mark Watkins's antichess solution database.
For registered players, Lichess employs a rating system, and grants the ability to compete in tournaments, post in the forums, and request a server-side full game analysis for any finalized game. The ratings for standard chess are categorized into Ultrabullet, Bullet, Blitz, Rapid, or Classical, depending on the game's total time or estimated total time (if using Fischer time control which increments time after each move).
Lichess runs live tournaments both in standard chess and in variant chess, and at different time controls, with the slowest not custom-made time control being 15 minutes per game with a 15 second increment per move. Where it differs from other online chess tournaments is they are run in an arena format where a member can join and leave at any time, and their score is retained if they rejoin during the tournament. In order to join a tournament, there is a requirement for the user to have played a sufficient number of games (in the same time control or the same variant).
- "Lichess Site Info". Alexa Internet. Retrieved February 11, 2019.
- Duplessis, Thibault (2014-08-05). "How old is lichess?". Lichess.org. Retrieved 12 June 2018.
- Duplessis, Thibault. "README". GitHub. Retrieved 14 August 2015.
- "How do you pronounce Lichess?". Lichess.org. Retrieved 2018-10-07.
- "Why is lichess free?". Lichess.org. Retrieved Jul 2, 2014.
- "Lichess Features". Lichess.org. Retrieved 5 December 2016.
- "Become a Patron of lichess.org". Lichess. Retrieved 22 November 2017.
We are a non‑profit association because we believe in a free, world-class chess experience for anyone, anywhere. We rely on support from [lichess users] to make it possible. If you've gotten something out of lichess, please take a second to pitch in!
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- Duplessis, Thibault. "LICENSE". GitHub. Retrieved 25 October 2016.
- "Android apps in Google Play". Retrieved 21 February 2016.
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- "Lichess detailed cost breakdown official spreadsheet". Docs.google.com.
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- "Play chess for free". Liverpool Daily Post. Liverpool, UK. December 11, 2010. Archived from the original on December 1, 2017. Retrieved 20 November 2017. Cite uses deprecated parameter
- "Certified Coaches". Lichess.org. Retrieved 7 October 2018.
- "Lichess embraces blind players with new chess site features". slashgear.com. Retrieved 7 August 2016.
- "Lichess variants • lichess.org". Lichess.org. Retrieved 2017-05-31.
- "Atomic Chess! And more". lichess.org. Retrieved 2019-06-14.
- "OMG Crazyhouse!". lichess.org. Retrieved 2016-01-25.
- "Accessibility for blind players". lichess.org. Retrieved 2019-06-14.
- Torres, JC (23 June 2014). "Lichess embraces blind players with new chess site features". Slashgear.com. Retrieved 14 August 2015.
- Leyden, John (14 March 2013). "We shall CRUSH you, puny ROBOT... with CHESS". The Register. Retrieved 20 August 2015.
- Araújo, Santi (2017). "Captcha de ajedrez: la mejor jugada contra los bots". Genbeta.com (in Spanish). Retrieved 20 November 2017.
- "Сайт дня: Lichess.org - чёрное и белое онлайн". Ferra.ru (in Russian). 2014. Retrieved 20 November 2017.
- "Recent Improvements". Lichess.org. Retrieved Feb 2, 2017.
- "Opening Explorer". Lichess.org. Retrieved Feb 26, 2016.
- Watkins, Mark. "Losing Chess: 1. e3 wins for White" (PDF). Retrieved 17 January 2017.
- "what's a berserk game?". Lichess.org. Retrieved 1 April 2019.
- "Mobile • lichess.org". Retrieved 5 June 2017.