lichess • Free Online Chess

Overview
Unleash your strategic prowess in lichess, the thriving online chess platform that's open source and eternally free, serving as a digital haven for 150,000 daily chess enthusiasts.

Key Features
1. Accommodates a vibrant community of 150,000 individual users each day.
2. Offers a variety of time controls: bullet, blitz, classical, and correspondence chess.
3. Engage in competitive arena tournaments.
4. Discover and challenge fellow players, and follow their matches.
5. Insights into game statistics and prowess.
6. Hone skills through interactive chess puzzles.
7. An array of chess variants, including Crazyhouse and Chess 960, playable online and offline.
8. Thorough game analysis backed by local and server computer evaluations.
9. Dive into an unlimited opening explorer.
10. Investigate endgame scenarios with the tablebase explorer.
11. Play against the computer without internet connectivity.
12. Initiate an Over The Board mode for in-person play.
13. Utilize a versatile chess clock with varied time formats.
14. Access a comprehensive board editor.
15. Available across 80 languages.
16. Designed for optimal use on both phones and tablets and supports landscape mode.

Interesting Gameplay
1. Navigate traditional chess rules and explore unique variants that challenge usual gameplay.
2. Surprise opponents with rare move sequences using the expansive opening explorer.
3. Progress strategic thought by analyzing your completed games to identify strengths and weaknesses.
4. Experiment with different chess disciplines through local and server-powered analyses.
5. Engage in mental battles against players worldwide or set up face-to-face duels with friends in OTB mode.