Progressive blindfold chess training from square recognition to full games
Stage
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Founded
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Based in
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FR
Pricing model
Freemium
Freemium
Pricing
Not given
Free: €0 forever with unlimited exercises, games vs AI, and access to levels 1-3. Pro Lifetime: €39 one-time payment for all 7 levels, all 8 AI difficulties, famous games library, endgame training, and intermediate tactics.
Key features
Spaced repetition with FSRS algorithm
Repertoire builder
Opening trainer with instant feedback
Game import from Lichess and Chess.com
Deviation detection
Course library with opening courses
iOS and Android mobile apps
Multiple language support
7 progressive training levels from square colors to full blindfold games
Unlimited exercises and games against AI
Voice-controlled play in 6 languages
Progress tracking and achievement system
Cross-device synchronization
Famous grandmaster games to replay blindfolded
Endgame training module
Multiple board visibility modes
Tactical puzzles and exercises
What makes it different
FSRS algorithm schedules reviews 15-30% more efficiently than SM2
Automatic deviation detection from Lichess and Chess.com games
Full repertoire builder in free tier with no course purchase required
Systematic progression from fundamentals to blindfold mastery, not just a side effect of puzzle training
Free tier is genuinely free with no dark patterns or engagement manipulation
One-time €39 lifetime payment with no subscription required
Built and maintained by a single indie developer actively improving the product
Available across web, iOS, and Android with unified account
ChessAtlas
DarkSquares