Lichess: How the Open Source Community is Revolutionizing Chess
A deep dive into the world’s most popular open-source chess platform, its impact, and how you can be part of its future.
The Chess Revolution
In 2010, a programmer named Thibault Duplessis had a simple yet powerful vision: create a chess platform that would be completely free, open-source, and accessible to everyone. Today, that vision has evolved into Lichess (pronounced “lee-chess”), a platform that serves millions of players daily and hosts billions of games annually. The name itself reflects its technical roots: “lila” = lichess in Scala.
“Lichess started as a weekend project. I never imagined it would become what it is today – a platform that makes high-level chess accessible to everyone, everywhere.” - Thibault Duplessis, Lichess Founder
Why Lichess Matters
In a world where most chess platforms lock advanced features behind paywalls, Lichess stands apart with its commitment to being completely free and open source. This isn’t just about chess – it’s about democratizing access to knowledge and tools that were once available only to elite players.
The Numbers Tell the Story
- Over 10 billion games played
- 9+ million monthly active users
- Available in 140+ languages
- 1200+ daily analysis hours contributed
- 350+ code contributors
- $0 cost to users for all features
What Makes Lichess Different
1. True Open Source Foundation
# The entire platform is open source
git clone https://github.com/lichess-org/lila.git
cd lila
# Even the analysis engine is open
git clone https://github.com/niklasf/fishnet.git
cd fishnet
2. Community-Powered Analysis
Every day, thousands of volunteers share their computing power through the Fishnet network, providing free computer analysis to players worldwide. This distributed system allows Lichess to offer unlimited analysis – a feature that usually costs money on other platforms.
3. Privacy-First Approach
- No advertisements
- No user tracking
- No data selling
- No premium features
- No hidden costs
Technical Architecture
The platform is built on a modern, scalable stack:
- Backend: Scala with Play Framework
- Frontend: TypeScript and Mithril.js
- Database: MongoDB and Redis
- Real-time: WebSocket
- Analysis: Distributed Stockfish instances
Feature Comparison with Other Platforms
Lichess
- Analysis: Unlimited free analysis
- Cost: Completely free
- Open Source: Yes
- Privacy: Full privacy protection
- Tournaments: Free unlimited access
- Learning Tools: Free comprehensive tools
- Mobile App: Full-featured free app
Commercial Platforms
- Analysis: Limited or paid
- Cost: Freemium or subscription-based
- Open Source: No
- Privacy: Limited protections
- Tournaments: Often paywalled
- Learning Tools: Premium features
- Mobile App: Varies by platform
How to Contribute
1. Development Environment Setup
# Prerequisites
sudo apt-get install mongodb-org nodejs git python3 java-11-openjdk
# Clone and run
git clone https://github.com/lichess-org/lila.git
cd lila
./ui/build
sbt run
2. Running a Fishnet Node
# Contribute to the analysis network
git clone https://github.com/niklasf/fishnet.git
cd fishnet
cargo run --release
3. Non-Code Contributions
- Translations via Crowdin
- Community moderation
- Bug reporting and testing
- Documentation improvements
- Creating educational content
Platform Impact & Community Growth
Lichess has transformed online chess by offering a free, open-source platform that serves millions globally. Here’s how it stands out:
Educational Access
Lichess provides free tools for all players, including:
- Unlimited puzzles, game analysis, and an opening explorer
- A study feature for creating and sharing lessons
- Position training against AI
These tools make high-quality chess education accessible to everyone. (source)
Tournament Platform
Lichess is a major hub for competitive online chess:
- Hosts Arena, Swiss, and simultaneous tournaments
- Offers private tournaments for clubs and schools
- Runs regular titled player events
Built-in anti-cheating measures ensure fair play. (source)
Open Source Community
Lichess’s open-source model encourages global collaboration:
- 400+ contributors on GitHub (source)
- AGPL-licensed code and an active developer Discord
Regular user contributions reflect a transparent and evolving platform.
Technical Impact
Lichess has advanced chess tech with:
- A public API for developers, a distributed analysis network, and real-time event broadcasting
- An open game database supporting research and innovation
These features demonstrate Lichess’s commitment to a free, community-driven chess experience, backed by a transparent, open-source approach.
Getting Started
As a Player
- Visit lichess.org
- No registration required to play
- Full access to all features
As a Developer
- Check GitHub issues
- Join Discord community
- Review contribution guidelines
As a Contributor
- Run a Fishnet node
- Help with translations
- Create educational content
Resources
Call to Action
Lichess proves that a community-driven, open-source project can revolutionize an entire field. Whether you’re a developer, chess enthusiast, or someone who believes in open source, there’s a place for you in this revolution.
Join us in keeping chess free, open, and accessible to everyone.
This blog post was last updated: November 2024