Free alternative to Chess.com Game Review
Blunderland is a free chess trainer that pulls your Chess.com or Lichess games, analyses them with Stockfish inside your browser and hands every blunder back as a puzzle to replay. No subscription, no cap on how many games you analyse, no account required.
The short answer
If you only want to know where a game went wrong, Lichess analysis is free and unlimited, and Chess.com Game Review does the job very well if you are a paying member.
If you want to stop making the same mistake, you need something else: replaying your failed positions, days later, until the reflex sticks. That is exactly what Blunderland does, for free and across all your games, not just the one you finished a minute ago.
What Chess.com Game Review does
Game Review walks through your game move by move, gives an accuracy score, labels your moves (brilliant, mistake, blunder) and adds a coach comment.
Its limit is commercial: at the time of writing, a free account gets one review per day, the rest sitting behind a paid membership. Its limit is also methodological: it narrates a game, it does not drill you. Once you close the review, nothing brings that position back next week.
What Lichess analysis does
Lichess is free and intends to stay that way: computer analysis is unlimited, and the “learn from your mistakes” mode replays the mistakes of the game you just opened. That is already a lot, and it deserves to be said plainly.
What is missing is long memory. Mistakes are not pooled into one queue across all your games, they do not come back at growing intervals, and nothing tells you that hanging a piece is three times more frequent for you than any other pattern.
The comparison
Three tools, three different jobs. The table below compares what matters when the goal is to remove blunders rather than to comment on a game.
| Criterion | Blunderland | Chess.com Game Review | Lichess analysis |
|---|---|---|---|
| Price | Free, no paid tier | One game a day for free, then membership | Free |
| Games you can analyse | Unlimited | Capped without a membership | Unlimited |
| Puzzles from your own games | Yes, every blunder becomes a puzzle | No | Mistake replay, one game at a time |
| Spaced repetition | Yes, SM-2 algorithm | No | No |
| Recurring patterns, measured | Yes, ranked by tactical pattern | Partial | No |
| Account required | No, a username is enough | Yes | Yes to analyse your games |
| Where analysis runs | In your browser, Stockfish WebAssembly | On Chess.com servers | On Lichess servers |
| Game sources | Chess.com and Lichess | Chess.com | Lichess |
When to stay on Chess.com or Lichess
Blunderland replaces neither, and does not try to. It hosts no games, offers no online play and no official rating, does not review openings and gives no positional assessment.
- To play, stay on Chess.com or Lichess: that is where your games live.
- To understand one specific game move by move, their built in analysis is richer.
- To study openings or endgames, other tools are better, and Blunderland is not one of them.
- To stop giving pieces away, that is Blunderland: it is the only niche it occupies, and it does it for free.
How to switch, in a minute
Nothing to install, no password to hand over. Games are read through the public Chess.com and Lichess APIs, from your username alone.
- Pick Chess.com or Lichess, type your username.
- Let Stockfish analyse your recent games inside your browser.
- Replay every blunder it found, then come back when the daily queue asks for them again.
Frequently asked questions
Is there a free alternative to Chess.com Game Review?
Yes. Blunderland analyses as many Chess.com games as you like, with no membership and no daily cap, and hands every blunder back as a puzzle. Lichess analysis is another free option, but it only covers games played on Lichess.
Does Blunderland replace Lichess or Chess.com?
No. You play your games there, and Blunderland picks them up afterwards for training. It offers no online play, no official rating and no opening courses.
Do I have to give my Chess.com or Lichess password?
Never. Only the username is asked for: public games are fetched through the official APIs of both sites.
How many games can I analyse for free?
As many as you want. Analysis runs on your machine with Stockfish compiled to WebAssembly, so one more player costs us nothing and there would be no reason to ration it.
How is this different from the Lichess “learn from your mistakes” mode?
That mode replays the mistakes of a single game, right after analysing it. Blunderland pools blunders from all your games into one queue and brings them back at growing intervals, with a ranking by tactical pattern so you can see what keeps coming back.
Do I need a Blunderland account?
No. Without an account, puzzles are stored in your browser. An account, opened with a code sent by email, only exists to carry your progress to another device.
Try it on your own games
Type your Chess.com or Lichess username: analysis starts right away, free, with no account and no cap.
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