Blackbox Chess vs Chessigma: Which One Fits How You Improve?
Checked on November 9, 2026. Prices are from each site's pricing page on that date.
Chessigma has grown fast by giving away something people want: unlimited free game review that feels a lot like Chess.com's. Blackbox Chess takes a different angle. Here is what each one actually gives you.
What Chessigma does
You enter your Chess.com or Lichess username, pick a game, and get a review: every move graded, an accuracy score, and the engine's top choices. The free tier also includes unlimited puzzles, some opening trainer lines, a couple of computer opponents that play like humans, and an AI coach with a monthly message limit.
The paid plan adds a personalized daily training plan, a "Chess DNA" report, unlimited opening trainer lines, more computer opponents, Woodpecker-style puzzle sets, more coach messages and no ads. When we went through their sign-up flow in October 2026, it analyzed 25 of our recent games to build that plan.
- Free: unlimited single-game review and puzzles, with ads.
- Paid: $14 a month, $97 a year, or $490 once for life, with a 7-day money-back guarantee.
What Blackbox Chess does
Blackbox Chess pulls your recent games, runs the Stockfish engine over every move, and groups your mistakes by type: named habits like leaving a piece where it can be taken for free, missing a fork (one piece attacking two at once), or a weak back rank. It ranks them by how often they happen and what they cost, so you know which one to work on first.
- Free: your last 10 games and your number one mistake type, named and explained. No account and no card.
- $10 one-off report: 100 games, every mistake type ranked, three of your own games where it happened, and a fix course built from your own positions. Full refund within 7 days if it is not useful.
- $12 a month or $99 a year: up to 500 games to start, then every new game analyzed weekly, a training library that brings your mistakes back until you get them right, an endgame trainer that plays perfect defense, 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
Chessigma's free side is about single games: review one, then the next. Its paid side is a broad training app with many tools. Blackbox Chess is narrower. It starts from the question "what do I keep doing wrong?", answers it from your whole recent history, and builds the training around that one answer.
Where Chessigma is better
- Free, unlimited single-game review with no sign-up.
- More kinds of training in one place: computer opponents, puzzle sets and an AI coach.
- A mobile app.
Where Blackbox Chess is different
- A free check needs no account and names your top mistake type from 10 games in about a minute.
- A one-off $10 option if you do not want a subscription.
- Every drill comes from your own games and is checked by Stockfish before you see it.
- An endgame trainer built from the endgames you actually misplayed.
- Personalized opening videos made from your own games.
Which should you pick?
If you want a free place to review every game and a big toolbox of training, Chessigma is a reasonable choice. If you want to know the one or two mistakes costing you the most games, and train on your own positions until they stop, that is what Blackbox Chess was built for.
You can see your own number one mistake type now, free, from your last 10 games. Analyze your games free.