Your AI Chess Coach
ChessMentor AI is the AI chess coach that analyses every move of your Chess.com and Lichess games with free Stockfish 18 analysis, detects your blunder patterns, and coaches you in plain words — so you fix mistakes and climb the rating ladder faster.
No account needed · go to my games →
35K+
games analysed
18
patterns detected
100%
in-browser
87%
Accuracy
63%
Win rate
1.2
Blunders/game
Detected patterns
Not engine lines.
Words.
Every mistake in your games is explained like a grandmaster would in a face-to-face lesson — plans, key squares, structures. No centipawns to decipher.
Best lines
Bd3 is premature — the bishop attacks nothing and blocks d3 where the queen may want to go. Nc3 was the right move: it defends d4, prevents Black's ...e5 counterplay, and leaves the bishop free to settle on Be3 or Be2 depending on Black's plan.
ChessMentor — Stockfish sees −0.89. Your coach tells you why — and what it means for your plan.
Get started now
Import your games
Enter your Lichess or Chess.com username to get started
Everything you need to improve
Free Online Stockfish Analysis
World's #1 chess engine, version 18 WASM. Analyze your chess games online for free — up to 4 games in parallel, right in your browser.
The coach comments every move
The AI coach annotates your games move by move, in plain words: plans, key squares, structures. Understand why a move is a mistake — not just that it is one.
Automatic error classification
Every move is classified: brilliant, good, inaccuracy, mistake or blunder — with the eval drop measured by Stockfish.
Per-game accuracy and stats
Move-by-move accuracy, blunders and mistakes per game, breakdown by game phase. A clear diagnosis of every game.
Multi-Platform Import
Import chess games from Lichess and Chess.com into the same profile. Analyze thousands of games online for free.
Local analysis
Stockfish runs in your browser. Your games never leave your machine for the analysis step.
How to Play Chess Online and Improve
Create a profile and add your accounts
Connect your Lichess, Chess.com account, or both. The system automatically imports your online chess games.
Run the free Stockfish analysis
Choose the number of cores and analysis depth. All your chess games are processed for free in the background.
Replay your games with the coach's comments
Every key move is annotated in plain words: why it's a mistake, what the right plan was. Relive your games like a lesson with a trainer.
Testimonials
Players who levelled up
"The AI coach pinpointed exactly why I was losing in the endgame. Within 3 weeks my win rate jumped 14 points."
Lucas M.
Lichess · 1650 → 1820
"I'd tried every puzzle app. ChessMentor is different — it analyses YOUR games and tells you YOUR mistakes. Game changer."
Sophie R.
Chess.com · 1420 → 1580
"The Stockfish WASM is insanely fast. I analysed 500 games overnight and by morning every mistake had a comment from the coach."
Matteo F.
Lichess · 1280 → 1410
Thousands of chess games analyzed for free online
Import your chess games from Lichess and Chess.com, then run free Stockfish 18 WASM analysis directly in your browser. No server, no limits.
35 447
games
12 847
Lichess
22 600
Chess.com
14 203
analysed
Ready to discover your mistakes? Import your games now.
Simple and transparent
Stockfish analysis is free. The AI coach is $14.99/mo — or $8.99/mo billed annually.
Free
Unlimited Stockfish analysis
- Import from Lichess & Chess.com
- Stockfish 18 analysis (unlimited)
- Interactive game viewer
- 1 game annotated by the AI coach
Pro
The AI coach annotates all your games
- Everything in Free included
- The AI coach annotates all your games
- Every mistake explained in plain words
- On-demand coach on any move
No charge for 15 days
Frequently asked questions
How do I import my games?
Is the analysis really free?
How is this different from Chess.com or Lichess?
Is my data secure?
Analyze your chess games online for free
Enter your Chess.com or Lichess username to analyze your chess games for free with Stockfish 18.
Everything about online chess
ChessMentor AI is your online AI chess coach. Whether you want to play chess better, analyze your chess games, or master chess openings, our tool guides you every step of the way.
Import your online chess games from Chess.com and Lichess, and let Stockfish 18 analyze every move on the chess board. The AI coach detects your recurring mistakes — whether it's hanging chess pieces, missed forks, or opening errors.
Unlike a regular chess game or chess set, ChessMentor AI teaches you how to improve. It's the best way to get better at chess — for free, with no limits.
ChessMentor AI
Ready to improve?
No charge for 15 days · Cancel anytime