Progressive blindfold chess training from square recognition to full games
A merge game with real physics where you combine balls to create gold
Stage
Not given
Startup
Founded
Not given
2026
Based in
FR
BG
Pricing model
Freemium
Not given
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
Real physics: balls fall with true weight and settle naturally into a glass jar
Eleven ball sizes from Moonstone to Aurum, with five falling and six created by merging
Six original musical pieces where every merge plays a note on beat
Progress tracking with sixty-four stars across four skies
Twenty-two visual sets that transform balls, jar, background and sound
Four game modes: sixty-four stages, Endless, daily challenge, and Zen
Friend codes and competitive weekly tournaments with medals
No ads and no ad SDK; purchases only affect appearance, never gameplay
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
Real physics engine where balls fall and settle naturally instead of snapping
Music integrated into gameplay: every merge plays a note that lands on the beat
No advertisements and no ad SDK in the entire build
Purchases only change appearance and sound, never game balance or outcomes
Permanent progression: every stage completion lights a star forever in the sky
DarkSquares
AURUM