Progressive blindfold chess training from square recognition to full games
Free local tracker for NBA Build-A-Bucket game runs with evidence-based analysis
Stage
Not given
Startup
Founded
Not given
2026
Based in
FR
Not given
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.
Not given
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
Track every pick with player name, trait, grade, and OVR
Compare Guard and Big attributes across 10 slots
Export runs as clean JSON for backup or sharing
Choose between Guard and Big roles and multiple game modes
Keep runs locally without account or upload
Review completeness and evidence labels for transparency
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
Evidence-based tracking that labels observed, verified, and unknown information
Local-first design with no account, upload, or official-game access required
Independent companion that does not claim access to hidden formulas
DarkSquares
Build-A-Bucket Guide