Find the crosses hidden in the colours — and unbuild them in reverse.
Progressive blindfold chess training from square recognition to full games
Stage
Not given
Not given
Founded
Not given
Not given
Based in
Not given
FR
Pricing model
Freemium
Freemium
Pricing
Free with ads; premium one-time purchase removes advertising and unlocks larger boards.
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
Reverse-order puzzle solving with visual stack unwinding
Budget-based scoring system with vessel metaphor
Two-tap control interface with visual feedback
Difficulty selection with variable cross counts
Musical scale progression during gameplay
Hint system with cross visualization
Six language interface support
Interactive help tour
Adjustable board size for varied challenge
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
Plays the game's deal sequence backwards as sound when solving
One-time purchase with no subscriptions or additional in-app purchases
Score system uses visual vessel metaphor instead of climbing counter
Clean minimalist UI with readable typography and strong UX
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
DarkSquares