Progressive blindfold chess training from square recognition to full games
Games and apps for iOS, Android and the browser
Stage
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Founded
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Based in
FR
RO
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
Native iOS and Android apps with Swift/SwiftUI and Kotlin/Jetpack Compose
Flutter and cross-platform development
Full product lifecycle from idea to App Store and Google Play
UX and interface design
Backend and API development
HTML5 browser games with cloud sync
Free-to-download apps with optional in-app upgrades
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
Small independent studio shipping published games and apps to millions
15 titles live in stores plus 6 free browser games
Full in-house product ownership from design through store launch
Client work published and maintained from the studio's developer account
DarkSquares
HashCoreAI