How to Analyze Your Chess.com Games with Stockfish (Free)

A simple, free way to run a full Stockfish analysis on any Chess.com game, read the report, and find the mistakes that actually cost you rating.

Chess.com’s built-in Game Review is good, but the deepest engine features sit behind a Diamond membership, and it only reviews games you played on Chess.com. The good news: you can get a full Stockfish analysis of any Chess.com game for free, read it in a few minutes, and walk away knowing exactly where the game turned. Here is how.

What you need

Just your Chess.com username, or the PGN of a single game. No account, no payment, and nothing to install. Stockfish itself is free and open source, and modern tools run it for you, either in your browser or on a server, so you never touch a command line.

Step 1: Load the game

Type your Chess.com username and pick the game you want from your recent history, or paste a PGN if you exported one. The position list and the moves both come straight from the game record, so the analysis matches exactly what you played.

Step 2: Run the analysis

The engine evaluates every position in the game and reports a score for each move, measured from White’s point of view. Higher depth means a stronger, more reliable verdict. A full-game scan at a solid depth takes seconds to a minute, depending on the game length, and you can replay the board while it works.

Step 3: Read the report

There are three things worth looking at first:

• Accuracy: a single percentage per player that summarizes how close your moves were to the engine’s preferences. See what counts as a good accuracy for context.
• The evaluation graph: the shape of the game. Sharp cliffs are where the advantage swung. Click a cliff to jump to that move.
• Move classifications: each move labeled Best, Good, Inaccuracy, Mistake, or Blunder. These are explained in detail here.

Step 4: Turn the mistakes into practice

Seeing a blunder is not the same as fixing it. The real improvement comes from replaying the losing position yourself and finding the move you missed. That is the difference between reviewing a game and training from it: one tells you what happened, the other changes what you do next time.

How deep should the analysis go?

Depth is a trade-off between speed and certainty. A shallow search is fast but can misjudge sharp tactical positions, sometimes recommending a move that a deeper search later refutes. A deep search is more trustworthy but slower. For a casual review, a moderate depth is enough to catch every real blunder and mistake; you only need maximum depth when you are trying to settle a genuinely close call in a complicated middlegame, which is rare in club-level games.

Common pitfalls when reading the report

Two mistakes are easy to make. The first is treating every Inaccuracy as important — most are noise, and chasing all of them wastes the time better spent on your two or three real Mistakes and Blunders. The second is only looking at your losses. Reviewing a game you won can reveal that you were actually lost at some point and your opponent handed the game back; that is just as valuable a lesson as a loss, and it is easy to skip because the result feels fine.

A note on privacy

You do not need to log in to your Chess.com account to analyze a game. Public game data is enough. With Chesslume, the live board analysis runs locally in your browser, and full game reports run on our Stockfish server. We never ask for your password.

Ready to try it? Run a free Stockfish review of your Chess.com game and see where the points went.