Chess Non Stop
Chess Analysis & Game Review
Get an instant, deep analysis of your games. Paste a PGN or set up a position to find mistakes, learn from the engine, and improve your strategy.
Analyze a Position
Analyze a Full Game
Your game moves will appear here.
Turn Your Games into Powerful Lessons
Pinpoint Your Mistakes
Our PGN analyzer reviews every move, highlighting blunders and inaccuracies. Understand the exact moment a game turned and see the true cost of a bad move.
Discover Missed Tactics
It's not just about what you did wrong, but what you could have done right. Our tool reveals the best moves and hidden tactics you overlooked, complete with the engine's top suggested lines. [12]
Build Winning Habits
By consistently reviewing games with our chess analysis tool, you'll recognize recurring patterns. This is the fastest way to build intuition and make better decisions over the board.
Practice Specific Scenarios
Use the board editor to set up any position. Analyze tough endgames, practice opening lines, or review critical moments from grandmaster games to prepare for your next match.
Simple and Instant Analysis
Get immediate Stockfish analysis without ads, logins, or navigating complex interfaces. Just paste your game and get results. [17]
Get Your Free Game Analysis in 3 Simple Steps
1. Import Your Game or Position
Paste your full game PGN, use a FEN for a specific position, or use the board editor to create any scenario you want to analyze. [3]
2. Run the Instant Analysis
The moment a position is on the board, our integrated Stockfish engine starts working. The evaluation bar provides real-time feedback, and top moves are shown with arrows.
3. Review, Learn, and Improve
Navigate your game move-by-move. Our analyzer automatically annotates blunders and mistakes. Click any move to see the position and what the engine recommended instead.
How to Understand the Engine Analysis
Understanding the engine's output is the key to improvement. Here’s a quick guide:
The Evaluation Score (e.g., +1.5)
This number shows who has the advantage. A positive score (+1.5) means White is winning by the equivalent of 1.5 pawns. A negative score means Black is better, and 0.00 is an equal position.
Move Annotations (??, ?!)
We flag moves based on how much they worsen your position (centipawn loss). A major drop in the evaluation is marked as a Blunder (??), while smaller errors are Mistakes (?) or Inaccuracies (?!).
Analysis Depth
This indicates how many moves ahead the engine has calculated. A higher depth (e.g., 20+) means the evaluation is more accurate and reliable, especially in complex positions.
Frequently Asked Questions
What engine does this chess analyzer use?
Our tool uses a recent version of the world-class Stockfish chess engine, trusted by grandmasters for its accuracy. [16]
How do I analyze my entire chess game?
From the website you played on (like Lichess or Chess.com), find the option to export or share the game as a PGN. Copy the text and paste it into the "Paste Your PGN" box on our tool. [17]
Is my chess analysis private?
Yes, completely. We do not save or view your PGNs or the positions you analyze. Everything is processed in your browser session.
Can I share my analysis with someone?
Absolutely. Once a position is on the board, click the "Share Analysis" button. This copies a unique link to your clipboard that you can send to anyone.
How is this different from Lichess or Chess.com analysis?
Our tool is built for speed and simplicity. You get the power of the same Stockfish engine with zero ads, no required login, and a more streamlined interface for quick analysis. [5, 17]
Can I use this on my phone?
Yes! Our tool is fully responsive and works on all modern devices, allowing you to analyze games on your phone or tablet. [11]