chessrank.org
Opponent Prep
Analyze your opponent's opening repertoire, spot weaknesses and play against their Ghost Bot.
Play Bots
Play chess against a ladder of bots from 200 to 2000 ELO, with Coach Moji hints in your corner. No clock, take moves back, and get a full game review when you finish.
Game Analysis
Free move-by-move analysis of any of your games. It shows your accuracy, your blunders and the best moves, so you learn from your own mistakes.
Report
Your personal chess dashboard: how your rating changes over time, your accuracy, your win rate and which openings you play best and worst, and much more.
Blunder Puzzles
Replay the blunders from your own games as puzzles, until you stop repeating them.
Puzzles
Rated tactics puzzles, completely free. Solve the whole line, not just one move.
Board Analysis
Set up any position and study it move by move with Stockfish, the strongest chess engine in the world.
Blog
Chess tips, guides and the latest updates from chessrank.org.
Brilliant Leaderboard
See who has found the most Brilliant moves — and replay their sharpest moments.
Behind chessrank.org
The story of chessrank.org, solo developer, mathematical models, tech stack and milestones.
More
chess9 — chess profile on chessrank.org
chessrank.org