Free Lichess game analysis: how to find the mistakes you keep repeating
Lichess gives you more free analysis than almost any chess site. The catch is that its tools look at one game at a time, while the mistakes that cost you rating are the ones you repeat across many games. Here is how to use the free Lichess tools well, and how to spot your patterns.
1. Request a computer analysis after each game
On any finished Lichess game, open the game page and use Request a computer analysis. Lichess runs Stockfish on its servers and marks inaccuracies, mistakes and blunders on the move list, with an evaluation graph that shows exactly where the game turned. It is free.
2. Use "Learn from your mistakes"
Once a game has computer analysis, Lichess offers Learn from your mistakes. It takes you back to each position where you went wrong and asks you to find a better move yourself before showing the engine's answer. This is far more useful than just reading the engine line, because you have to see the idea on your own.
3. Explore lines on the analysis board
The analysis board (lichess.org/analysis) runs Stockfish locally in your browser. Try the move you wanted to play and see the refutation. Ask: what did I miss, a check, a capture or a threat? That question is the core of a good blunder check.
4. Check your openings with the opening explorer
In the analysis board, the opening explorer shows what masters and Lichess players play in a position, and how those moves score. If you keep getting bad positions out of the opening, compare your moves with the common ones at the point where your game left them.
5. Look at Lichess Insights for big-picture trends
Lichess Insights (on your profile, or lichess.org/insights/your-username) lets you chart your own results by opening, piece, game phase, time of move and more. It is powerful but you have to know which question to ask, and it can take some time to set up the right chart.
Why one game at a time is not enough
A single game review tells you that move 23 was a blunder. It does not tell you that you hang pieces in the middlegame in two out of three losses, or that you throw away winning positions in blitz, or that one opening keeps costing you points as Black. Those are the patterns worth training, and you only see them by looking at many games together.
A simple weekly routine
- After every serious game: request computer analysis and do Learn from your mistakes.
- Once a week: look across your recent games for the same kind of mistake (same phase, same piece left hanging, same opening).
- Pick one pattern and train it for a week: tactics on that theme, slower games, a blunder check on every move.
Get a pattern report from your Lichess games
BlunderLens reads your recent public Lichess games through the official Lichess API (with clock times), runs Stockfish in your browser and groups your biggest mistakes: game phase, missed punishments, thrown wins, time trouble and openings by colour. You get your top 3 repeated mistakes with a short explanation, a fix and a drill for each. No login, no PGN upload, and your Lichess account is never touched.
See which of these mistakes you actually make
Enter your Lichess username. Stockfish checks your recent games in your browser and shows the 3 mistakes you repeat most. Free, no signup.
FAQ
Is Lichess computer analysis free?
Yes. Lichess is free and open source, and you can request server-side Stockfish analysis on your finished games and use the in-browser analysis board without paying.
What does Learn from your mistakes do on Lichess?
After a game has computer analysis, it takes you back to each position where you made a mistake or blunder and asks you to find a better move before revealing the engine's suggestion.
How is BlunderLens different from Lichess analysis?
Lichess analyses one game at a time. BlunderLens looks at your recent games together and counts which kinds of mistakes you repeat most, so you know what to train first. It uses only public game data.
Do I need to log in or connect my Lichess account?
No. BlunderLens only needs your Lichess username and reads your public games through the official Lichess API.