Accessibility: Enable blind mode
lichess
.org
Play
lichess.org
Create a game
Arena tournaments
Swiss tournaments
Simultaneous exhibitions
Puzzles
Puzzles
Puzzle Dashboard
Puzzle Streak
Puzzle Storm
Puzzle Racer
Learn
Chess basics
Practice
Coordinates
Study
Coaches
Watch
Broadcasts
Lichess TV
Current games
Streamers
Video library
Community
Players
Teams
Forum
Blog
Tools
Analysis board
Openings
Board editor
Import game
Advanced search
Donate
Sign in
Hot
Hot
Date added (newest)
Date added (oldest)
Recently updated
Most popular
Alphabetical
ScienceYo's Study
1 • ScienceYo •
Chapter 1
ScienceYo