Repositories list

• mobile

  Public
  New Lichess mobile app in Flutter

  androiddartios+ 4mobilechessflutterlichess

  Dart

  •

  GNU General Public License v3.0

  •316•2k•338•28•Updated Nov 19, 2025Nov 19, 2025

• lila

  Public
  ♞ lichess.org: the forever free, adless and open source chess server ♞

  gametypescriptchess+ 7scalafunctional-programmingplay-frameworkfree-softwaretype-safenon-profitlichess

  Scala

  •

  GNU Affero General Public License v3.0

  •2.5k•17k•1.1k•20•Updated Nov 19, 2025Nov 19, 2025

• berserk

  Public

  lichess-org/berserk’s past year of commit activity
  Python client for the lichess API

  Python

  •

  GNU General Public License v3.0

  •64•142•6•7•Updated Nov 19, 2025Nov 19, 2025

• flutter-sound-effect

  Public

  lichess-org/flutter-sound-effect’s past year of commit activity
  Flutter plugin to play short sounds with low latency

  gamedartsound+ 5low-latencyflutteravaudioplayersoundpoollow-latency-audio

  Dart

  •

  GNU General Public License v3.0

  •3•6•3•0•Updated Nov 19, 2025Nov 19, 2025

• api

  Public
  Lichess API documentation and examples

  lichess

  TypeScript

  •

  GNU Affero General Public License v3.0

  •161•512•20•0•Updated Nov 19, 2025Nov 19, 2025

• lila-ws

  Public

  lichess-org/lila-ws’s past year of commit activity
  Lichess' websocket server

  redisstreamingreactive+ 5scalaakkawebsocketpubsublichess

  Scala

  •

  GNU Affero General Public License v3.0

  •98•169•2•0•Updated Nov 18, 2025Nov 18, 2025

• scalachess

  Public

  lichess-org/scalachess’s past year of commit activity
  Chess API written in scala. Immutable and free of side effects.

  chessfunctional-programmingbitboard+ 3lichessbitboard-datastructurescala-3

  Scala

  •

  MIT License

  •224•742•5•4•Updated Nov 18, 2025Nov 18, 2025

• chessground

  Public
  Mobile/Web chess UI for lichess.org

  typescriptuichess+ 2boardlichess

  TypeScript

  •

  GNU General Public License v3.0

  •301•1.2k•27•4•Updated Nov 17, 2025Nov 17, 2025

• compression

  Public

  lichess-org/compression’s past year of commit activity
  Chess clock and move compression algorithms for lichess.org

  Scala

  •

  GNU Affero General Public License v3.0

  •21•119•1•3•Updated Nov 16, 2025Nov 16, 2025

• fishnet

  Public

  lichess-org/fishnet’s past year of commit activity
  Distributed Stockfish analysis for lichess.org

  chessdistributed-computinglichess+ 2volunteer-computingstockfish

  Rust

  •

  GNU General Public License v3.0

  •109•840•6•2•Updated Nov 16, 2025Nov 16, 2025

• stockfish-web

  Public

  lichess-org/stockfish-web’s past year of commit activity
  A home for stockfish wasms - because we care

  Python

  •

  GNU General Public License v3.0

  •5•19•0•0•Updated Nov 15, 2025Nov 15, 2025

• lila-search

  Public
  Keep elasticsearch threads out of your web facing app, kids

  elasticsearchchessscala+ 7functional-programmingtypelevellichessscala3cats-effectsmithysmithy4s

  Scala

  •

  GNU Affero General Public License v3.0

  •27•49•2•6•Updated Nov 15, 2025Nov 15, 2025

• scalalib

  Public

  lichess-org/scalalib’s past year of commit activity
  Misc scala utilities shared by the lichess.org scala projects.

  librarychessscala

  Scala

  •

  MIT License

  •21•20•1•0•Updated Nov 15, 2025Nov 15, 2025

• lila-docker

  Public
  Lichess local development using Docker Compose.

  dockerdocker-composelichess

  Rust

  •

  GNU Affero General Public License v3.0

  •86•101•6•1•Updated Nov 15, 2025Nov 15, 2025

• broadcaster

  Public

  lichess-org/broadcaster’s past year of commit activity
  Broadcast your chess games on Lichess!

  Vue

  •

  GNU Affero General Public License v3.0

  •10•21•9•0•Updated Nov 15, 2025Nov 15, 2025

• chess-openings

  Public

  lichess-org/chess-openings’s past year of commit activity
  An aggregated data set of chess opening names

  chessdatasetlichess

  Python

  •

  Creative Commons Zero v1.0 Universal

  •111•453•5•4•Updated Nov 14, 2025Nov 14, 2025

• op1

  Public

  lichess-org/op1’s past year of commit activity
  Probe Marc Bourzutschky's partial 8-piece tablebase, op1

  C

  •

  GNU Affero General Public License v3.0

  •0•1•0•0•Updated Nov 13, 2025Nov 13, 2025

• lila-fishnet

  Public
  Proxy between lila and fishnet move clients

  catschessfunctional-programming+ 4typelevellichessfishnetcats-effect

  Scala

  •

  GNU Affero General Public License v3.0

  •29•47•0•3•Updated Nov 13, 2025Nov 13, 2025

• papers

  Public

  lichess-org/papers’s past year of commit activity
  Papers that use Lichess data, study Lichess, or cite Lichess

  chessbibliographypublications+ 1lichess

  TeX

  •

  Creative Commons Zero v1.0 Universal

  •4•31•3•0•Updated Nov 11, 2025Nov 11, 2025

• lila-tablebase

  Public

  lichess-org/lila-tablebase’s past year of commit activity
  Tablebase server

  rustchesslichess+ 3http-apisyzygytablebase

  Rust

  •

  GNU Affero General Public License v3.0

  •15•92•0•1•Updated Nov 8, 2025Nov 8, 2025

• lila-db-seed

  Public
  Sample database data for lila development

  Python

  •

  MIT License

  •19•23•1•0•Updated Nov 7, 2025Nov 7, 2025

• pgn-viewer

  Public

  lichess-org/pgn-viewer’s past year of commit activity
  PGN viewer widget

  javascripttypescriptchess+ 3viewerpgnlichess

  TypeScript

  •

  GNU General Public License v3.0

  •32•134•4•4•Updated Nov 6, 2025Nov 6, 2025

• zulip

  Public

  lichess-org/zulip’s past year of commit activity
  Zulip server and web app—powerful open source team chat - slightly hacked by and for lichess.org

  Python

  •

  Apache License 2.0

  •8.9k•6•0•0•Updated Nov 3, 2025Nov 3, 2025

• lila-openingexplorer

  Public

  lichess-org/lila-openingexplorer’s past year of commit activity
  Opening explorer for lichess.org that can handle all the variants and trillions of unique positions

  chesslichesshttp-api+ 1chess-database

  Rust

  •

  GNU Affero General Public License v3.0

  •39•148•2•6•Updated Nov 1, 2025Nov 1, 2025

• lila-gif

  Public

  lichess-org/lila-gif’s past year of commit activity
  Webservice to render Gifs of chess positions and games, and stream them frame by frame

  chessgiflichess+ 1http-api

  Rust

  •

  GNU Affero General Public License v3.0

  •24•110•6•8•Updated Nov 1, 2025Nov 1, 2025

• fishnet-builder

  Public

  lichess-org/fishnet-builder’s past year of commit activity
  Docker image for an environment that can produce fully static Stockfish builds

  C

  •0•2•0•0•Updated Oct 24, 2025Oct 24, 2025

• chessground-examples

  Public

  lichess-org/chessground-examples’s past year of commit activity
  Usage examples for chessground

  TypeScript

  •

  GNU General Public License v3.0

  •35•62•1•1•Updated Oct 22, 2025Oct 22, 2025

• api-ui

  Public

  lichess-org/api-ui’s past year of commit activity
  some web UIs on top of the Lichess API

  lichess-apilichess

  TypeScript

  •

  GNU Affero General Public License v3.0

  •4•22•0•0•Updated Oct 18, 2025Oct 18, 2025

• lila-http

  Public

  lichess-org/lila-http’s past year of commit activity
  Handle some https://lichess.org/tournament load

  lichess

  Rust

  •

  GNU Affero General Public License v3.0

  •13•40•0•5•Updated Oct 18, 2025Oct 18, 2025

• fishnet-assets

  Public

  lichess-org/fishnet-assets’s past year of commit activity
  NNUE files built into https://github.com/lichess-org/fishnet

  chesslichessstockfish

  0•0•0•0•Updated Oct 12, 2025Oct 12, 2025