Progressive blindfold chess training from square recognition to full games
Challenge a friend to wake up, do the work, and beat them
Stage
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Founded
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Based in
FR
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Pricing model
Freemium
Free
Pricing
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.
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Key features
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
Real system alarm that starts the race
Camera-based rep counting for squats and exercises
Barcode scanning for proof of completion
Photo evidence verification
Hidden time scoring until both players finish
Series score and win streak tracking
Did Not Start tracking for missed challenges
Offline-capable with server synchronization
No video recording or transmission
Self-report verification option
What makes it different
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
Times stay completely hidden until both players finish, eliminating spoilers
Fair scoring based on personal alarm time regardless of wake-up hour
No video ever recorded, stored or transmitted for privacy
Works fully offline without requiring signal
Tamper-proof with server-side timestamp verification
DarkSquares
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