Blackbox Chess vs Chess.com Game Review and Insights
Checked on November 9, 2026. Plans and limits change, so check each site before you pay.
If you play on Chess.com, you already have Game Review one click away after every game. So the fair question is: why would you use anything else? The short answer is that Game Review and Blackbox Chess answer two different questions. Game Review asks "what went wrong in this game?" Blackbox Chess asks "what keeps going wrong in all of them?"
What Chess.com Game Review does
Game Review runs the Stockfish chess engine over a single game. It labels each move (from "Brilliant" down to "Blunder"), gives you an accuracy score, and shows the engine's better move wherever you went wrong. It lives right where you play, it is fast, and for one game it is very good.
What you get depends on your membership, according to Chess.com's own help page:
- Free: one full Game Review per day.
- Platinum: unlimited Game Review.
- Diamond: unlimited Game Review, coach explanations for every move, and Insights.
Insights is Chess.com's stats page across all your games: things like how you score with each opening, how your accuracy changes by game phase, and how you use your clock. It shows you numbers. It does not tell you which specific mistake is behind them.
What Blackbox Chess does
Blackbox Chess pulls your recent Chess.com or Lichess games, runs Stockfish over every move, and then groups your mistakes by type. A "type" is a named habit, such as leaving a piece where it can be taken for free, missing a fork (one piece attacking two of yours at once), or a weak back rank (your king stuck on the bottom row with no escape square). It then ranks those types by how often they happen and how much they cost you, so the first thing you see is the one to work on first.
- Free: your last 10 games, your number one mistake type named and explained. No account and no card.
- $10 one-off report: your last 100 games, every mistake type ranked, three of your own games where it happened with the moves shown, and a short fix course built from your own positions. Not useful? Email within 7 days for a full refund.
- $12 a month or $99 a year: every new game you play is analyzed each week, your mistakes become a training library that brings positions back on a schedule until you get them right, an endgame trainer, and one personalized opening video a week. You also see how often your number one mistake happens now compared with when you started.
The real difference
Game Review is a microscope. It is the right tool when you just lost a game and want to know exactly where it turned. The trouble is that one game rarely shows a pattern. You can review twenty games in a row, see twenty different "best moves," and still not notice that eleven of those losses started the same way.
Blackbox Chess is built for that second job. It reads the games together so you do not have to, and it turns your Chess.com history into a ranked list of the mistakes you repeat. Insights comes closest on Chess.com's side, but it reports statistics. It does not name the habit or give you drills from the positions where it happened.
Where Chess.com is better
- It is already built into the site where you play, with nothing to sign up for.
- Game Review is instant after each game, and the move-by-move explanations on Diamond are good for learning one game in depth.
- Chess.com has a huge library of lessons, puzzles and courses that Blackbox Chess does not try to copy.
Where Blackbox Chess is different
- It looks across 10 to 100 games at once (up to 500 when you subscribe), not one at a time.
- It names the mistake type and ranks it, instead of only listing better moves.
- Drills come from your own games, and every one is checked by Stockfish before you see it.
- It works with Lichess too, and the free check needs no account.
Which should you use?
Use both. Keep using Game Review right after a game while it is fresh. Every few weeks, step back and look at the whole picture, because that is where the mistake costing you the most games usually hides.
You can see your own number one mistake type now, from your last 10 games, free and with no account. Analyze your games free.