Lichess

Overview

Lichess is a 100% free, ad‑free, and open‑source online chess server where users can play live or correspondence chess, solve puzzles, analyze games with powerful tools, join tournaments, and explore variants. All features are available without payment and the project is funded by donations.

Key features

• Live chess
• Correspondence chess
• Chess variants
• Tournaments
• Puzzles
• Game analysis
• Opening explorer
• Studies & lessons
• Rating system
• Friends & challenges
• Mobile apps